# L3 Energy Construction — the full text (llms-full.txt)
> Water in the house? L3 Energy Construction finds the source and repairs it: roof, window, deck and stucco leaks, damp slab floors, drainage, mold and emergency dry-out on the Southern California coast, Malibu to La Jolla. CSLB #1149191. Call (949) 612-4046.
Canonical page: https://l3energyconstruction.com/ · structured data: GeneralContractor, WebSite, WebPage, FAQPage, HowTo · city pages: https://l3energyconstruction.com/capistrano-beach, https://l3energyconstruction.com/long-beach-peninsula, https://l3energyconstruction.com/newport-beach, https://l3energyconstruction.com/malibu, https://l3energyconstruction.com/laguna-beach, https://l3energyconstruction.com/san-clemente · machine-readable log: https://l3energyconstruction.com/siege-log.json
## The promise
The ocean doesn't stop at the seawall. It comes in underneath.
Water-intrusion forensics and licensed repair for coastal homes, Malibu to La Jolla. We find every path the water took, document it for your insurer and the City, and close it.
### In the Engineer register
Hydrostatic siege. Structural equilibrium for tidally influenced soils.
Forensic diagnosis and remediation of envelope and below-grade intrusion under tidal, surge and elevated-groundwater loading. Licensed general contractor, Hydrotech lineage since 1999.
## Common leaks
Not on the sand? Most water problems aren't.
You do not need an ocean view to have water in the house. These are the calls L3 Energy Construction takes most, from the beachfront to the low blocks behind it. Each one starts the same way: we find where the water gets in before anything is torn out.
stain on the ceiling after rain
Roof and flashing leaks
The stain is rarely under the hole. Water runs along the framing before it drops. We trace it back with a controlled water test and fix the entry point, not the paint.
water at a window or slider
Windows and sliding doors
It shows up on the sill or the floor in a wind-driven rain. Usually it is the flashing around the opening, not the glass. We spray-test it to prove which joint leaks.
drip or stain below a deck
Decks and balconies
A deck over a room is a roof you walk on. When its membrane or drains fail, the ceiling below tells you. We find the breach without flooding the deck or tearing it up.
cracks, bubbles, rust streaks
Stucco and exterior walls
Stucco is meant to get wet and drain. When the paper behind it fails or its bottom edge is buried, the wall holds water and the framing pays for it.
damp floors, lifting planks, white powder
Slab foundations
Most California homes sit on a concrete slab. Concrete is not waterproof: ground moisture comes up through it, fastest at cracks and joints. Flooring cups, glue lets go, a white salt crust appears.
puddles against the house
Drainage and sump pumps
Water that sits against a foundation finds a way in. We regrade, install French drains and sump pumps, and give the water somewhere else to go.
musty smell, spots on walls
Mold
Mold means something has been wet for a while. We remove it and fix what is feeding it. Cleaning mold without fixing the leak buys a few months.
water on the floor right now
Emergency dry-out
We pull the water, set drying equipment, and record what got wet before it dries, so your claim has evidence behind it.
A pipe leaking under the slab is a plumber's repair. Not sure whether it is a pipe, rain or groundwater? Call us first. We find the source, then make the repair or bring in the right trade.
## Six places the water gets in
On the water: six places it gets in. We've opened all of them.
On an oceanfront lot, rain is the smaller problem. Tide is the bigger one. It arrives from the front, from below, and from the soil against the house, and it leaves salt behind.
deck ledger line · at FFE
Deck ledger and flashing
Where the deck bolts to the house. The single most common source of water inside coastal walls, and it rots from the inside.
slab edge · cold joints
Slab edge and cold joints
Water wicks up through the slab edge and every joint in the concrete. Floors blister, baseboards swell, nothing on the surface explains it.
below-grade walls · −9 ft
Lower levels and sunken garages
A lower level becomes a bathtub when the water table rises. On a king tide it can come up through the floor with no rain at all.
planters · retaining walls
Planters and retaining walls
A planter against the house holds water against the wall around the clock. Retaining walls fail from the water behind them, not the dirt.
sills · thresholds at grade
Windows and doors at grade
Sills and thresholds a few inches above a patio that floods. Spray finds the gap the installer left.
crawlspace · subgrade
Under the house
Crawlspaces fill from below. You smell it before you see it, and by then the framing has been wet for weeks.
## Behind the beachfront
The sea doesn't stop at the first row of houses.
Near the coast, the groundwater under your street floats on seawater. When the sea rises, the water table rises with it, blocks inland, with no wave in sight. It pushes up on every slab it reaches.
The water table follows the sea. Daily tides fade within a short distance of the shore. A rise that lasts for months, like this winter's, carries farther inland.
What it looks like
A slab or garage floor that sweats. Flooring that lifts or cups. A white salt line at the base of walls. Rust at the bottom of door frames and posts. A sump pump that runs in dry weather.
Why this winter is worse
El Niño adds up to a foot of sea level on the Southern California coast and holds it there until spring. King tides stack on top on Nov 24–26, Dec 23–25 and Jan 21–22. The ground behind the beach is lowest on harbor islands, peninsulas, bayfront streets and old marsh.
What we do about it
Measure first: the water table, and the moisture in the slab. Then relieve it, with drainage and a sump where the ground allows, sealed joints and cracks, and a moisture barrier under the new floor.
Source: U.S. Geological Survey, Befus and others, Nature Climate Change, 2020. Rising sea level raises coastal water tables in California, because shallow groundwater floats on the seawater beneath it. Read the USGS summary.
## For the professionals on the file
For the professionals on the file.
Architects, engineers of record, insurance counsel, adjusters, estate managers and family offices: this is how we work with you. We do not practise engineering. We find the water, document it to standard, and build to the stamped plans.
scope
What a forensic assessment includes
Site walk with you or the owner's representative; survey, plans and prior reports reviewed first.
Elevations tied to the owner's survey and reported in NAVD88 and MLLW, with the tide gauge named.
Moisture survey, pin and non-invasive, every reading placed on the floor plan.
Infrared survey of walls, slabs and ceilings, before and after any intervention.
Field water testing at openings (ASTM E1105, AAMA 501.2), electronic leak detection on membranes (ASTM D7877), flood testing where finishes allow (ASTM D5957).
A water-table observation point where the lot warrants it, logged through the king tides.
deliverables
What you receive
Cause-of-loss report: dated, numbered photo log, findings, mechanism, recommended remedy.
Moisture map and infrared survey on plan; test logs with locations and results.
A bid-ready scope other contractors can price, or our proposal to build it.
Written for insurers, counsel and building officials; the engineer of record is named separately.
Sample reports are in the archive.
who holds what
From the seawall inward
The beach and the seawall: the City, the Coastal Commission, the coastal engineer and the armoring contractor. We coordinate; we do not build them.
The structure: the engineer of record's stamped plans. We build to them and bring in the geotechnical and structural engineers the plans need.
Everything from the seawall inward: lower levels, slabs, deck ledgers, planters, retaining walls, crawlspaces, drainage, membranes, sumps. Ours.
Hydrotech lineage since 1999, including Construction Defect – Expert Witness assignments.
discretion
How the house is run
We work through the estate manager, the architect or the family office when that is how the house is run.
No photograph of the home leaves the file without written consent. The archive on this site shows sample entries, not clients.
One licensed contractor, one point of contact, from the first visit to the last inspection.
Your lot, your numbers.
The simulator's house is illustrative. Put in the elevations from the owner's survey and read the same model for that lot: water table under the slab, uplift, and the wave at the wall for each of this winter's sea states. Hydrostatic only; a survey and an engineer's letter replace it.
Sea stateTideSwellWater tableUnder the slabUpliftWave at wallCrest vs wall
Water table = 0.5 + 0.6 × tide (ft MLLW). Uplift = 64 psf per foot of seawater above the underside of the slab. Wave at the wall is depth-limited: at most 0.78 × the water depth over the sand plus 12% of the offshore swell. Crest = tide + 1.3 × wave at the wall. The L3 drawdown holds the table at +2.5 ft MLLW.
Request a forensic scope
Call (949) 612-4046
## The Hydrotech Lab
The Hydrotech Lab.
The diagnostic practice that started as Hydrotech Construction in 1999 is now L3's forensic division. Hydrotech's work included Construction Defect – Expert Witness assignments, so the findings are written to hold up when someone challenges them. We find the source before anyone opens a wall, and we write it down in a form your insurer and your attorney can use.
Thermal imaging
infrared, surface temperature mapping
Wet framing and saturated concrete read cold. We map it before and after every intervention.
Moisture mapping
pin and non-invasive meters, logged to plan
Every reading placed on the floor plan, so the pattern shows the path.
Field spray testing
ASTM E1105 · AAMA 501.2
Controlled water on windows, doors and walls to reproduce the leak on demand instead of guessing.
Electronic leak detection
ASTM D7877
Pinpoints breaches in deck and plaza membranes without flooding or demolition.
Flood testing
ASTM D5957
Horizontal membranes held under water to prove they hold before finishes go back.
Cause-of-loss reports
for insurers, attorneys, building officials
Photo-documented findings and the recommended remedy, in a form other contractors can bid from.
1986
Residential construction
Nathan McDonnell starts building in Orange County.
1999
Hydrotech Construction
Founded to specialize in water intrusion: rain leaks, building envelope, forensic reports. Construction Defect – Expert Witness. Licensed July 1999 for general building and flooring, CSLB #766196. Hydrotech page →
2026
L3 Energy Construction LLC
CSLB #1149191. Coastal water intrusion, forensic to finished.
## Questions homeowners ask
Questions homeowners ask us.
Short answers in plain words. If yours is not here, call.
Why is my floor damp when there is no leak and it has not rained?
Moisture is most likely coming up through the concrete slab. Concrete is porous, so ground moisture or a high water table pushes vapor and water through it, fastest at cracks, joints and the slab edge. Near the coast the water table rises and falls with the sea, so floors can turn damp in dry weather. A moisture test of the slab confirms it.
Can the ocean affect a house that is not on the beach?
Yes. Near the shore, groundwater floats on seawater, so a higher sea lifts the water table under streets that are blocks inland. The U.S. Geological Survey has modeled this along the California coast. The result is pressure from below on slabs, garages and buried utilities, with no flooding on the surface.
What is hydrostatic pressure, and what does it do to a slab foundation?
Hydrostatic pressure is the push of standing water on whatever holds it back. It grows with depth: about 62 pounds per square foot for every foot of fresh water, 64 for seawater. One foot of groundwater above the underside of a slab pushes up on every square foot of that floor, which is why water appears at cracks and joints first.
Who do I call for water in the house: a plumber, a roofer or a water-intrusion contractor?
Call a plumber when a pipe or fixture is leaking: the water is clean and constant, and the meter moves with every tap closed. Call a water-intrusion contractor when the water follows rain, tide or irrigation, or when nobody can tell where it comes from. L3 finds the source first, then makes the repair or brings in the right trade.
Should I dry out a flooded room first, or document it first?
Do both the same day, in that order. Stop the water if it is safe, photograph everything and take moisture readings, then start drying. Most insurance policies expect you to limit the damage, and the adjuster will want proof of what was wet. L3 records the damage and runs the dry-out in one visit.
Will a French drain or a sump pump fix a wet slab?
Often, when the water is coming from the ground. A drain collects water around or under the slab and a sump pump sends it away, which lowers the pressure on the concrete. It will not fix a roof, window or pipe leak, so the source has to be confirmed first.
Does L3 remove mold?
Yes. L3 removes mold and repairs the leak that caused it. Mold needs moisture, so removing it without fixing the source usually fails within months.
What does El Niño change for coastal homes this winter?
It raises the sea. NOAA's October 8 update says a strong-to-very strong El Niño is likely through the winter, with an 83 percent chance that October to December is the strongest since 1950. The Kelvin wave has already added several inches to sea level off Southern California, with king tides on Nov 24–26, Dec 23–25 and Jan 21–22 on top. On Oct 9 Newport Beach's morning tide came in 20 inches above the prediction. Higher water reaches seawalls and lifts the groundwater behind them.
Where does L3 Energy Construction work?
L3 works the Southern California coastal strip from Malibu to La Jolla: beachfront homes and the low-lying blocks behind them. It comes to the house: the assessment, the testing and the repair all happen on site. Call (949) 612-4046.
Is L3 licensed, and how long has it done water-intrusion work?
Yes. L3 Energy Construction LLC is a California licensed general contractor, CSLB #1149191. Its water-intrusion practice began as Hydrotech Construction in 1999, and Hydrotech's work included construction-defect expert witness assignments.
## Rebuild the beach
Rebuild the beach.
The button above puts the sand back. On the coast that is public work, on public money and public timelines, and this month it is happening in real time. Here is what it does for a house, what it does not, and where we come in.
sandWhat the cities are doing
Long Beach is trucking 50,000 to 100,000 cubic yards onto the Peninsula and has fast-tracked an $11.4 million dredge of about 415,000 more. Newport Beach is moving 100,000 cubic yards of Santa Ana River sand to West Newport this month. San Clemente puts its deficit at 2 to 4 million cubic yards and votes on Measure M, a sales tax for sand, in November. Sand is the buffer. It is also the first thing the next swell takes.
armorThe seawall and the revetment
Repairing or raising the wall is the coastal engineer's design and the armoring contractor's build, under the emergency permit the State now decides in 24 hours. The permit lasts 120 days; the follow-up permit still has to be won. We coordinate it. We do not build it.
inwardEverything from the seawall in
The slab, the lower level, the deck ledger, the planters, the crawlspace and the water table under the house. While the sand is on order and the wall is in design, the water is already inside. We document it, stop the active path, and build the fix: drains and a sump that hold the table under the slab, a membrane on the walls, relief in the floor.
Figures as reported: Long Beach Post, Oct 9 and Oct 11 · Voice of OC, Oct 1 · emergency permits: Governor's proclamation, Sep 21.
## The first 24 hours when seawater gets into the house
In this order. Documenting and drying happen the same day; documenting comes first.
1. Make it safe. If you smell gas, get out and call the gas company from outside. Switch off power to circuits that are wet. Do not enter a red-tagged house; a yellow tag says what you may do.
2. Stop the water if you safely can. Close the valve if it is a pipe. If it is the sea or the ground, there is nothing to close; move what you can above the water line and leave the rest in place for the photographs.
3. Photograph and video everything before it moves. Every room, the water line on the walls, the floor, the garage, the contents, the outside of the house and the beach or street. Phone timestamps are fine. Nothing gets dried, moved or thrown out before it is on record.
4. Take moisture readings. A pin meter on walls and floors, room by room, written down with the time. If you do not have one, we bring ours; the readings date the damage.
5. Open the claim. Call your insurer the same day, say you are limiting the damage, and send the photographs. Keep the City's tag notice if there is one. Wave and flood damage is often a flood-policy question; the record matters either way.
6. Start drying. Extraction, air movers and dehumidifiers the same day. Wet drywall and insulation that took seawater come out; the salt stays in whatever is left. Do not tear out beyond what has been photographed.
7. Find out what the water did underneath. A damp floor with no rain, a salt crust on concrete, doors that bind and new cracks mean the water is under the slab. That is a moisture survey, not a guess, and it is where we start.
## Water intrusion testing (https://l3energyconstruction.com/water-intrusion-testing)
- Thermal imaging (infrared, surface temperature mapping): Wet framing and saturated concrete read cold. We map it before and after every intervention.
- Moisture mapping (pin and non-invasive meters, logged to plan): Every reading placed on the floor plan, so the pattern shows the path.
- Field spray testing (ASTM E1105 · AAMA 501.2): Controlled water on windows, doors and walls to reproduce the leak on demand instead of guessing. A window or slider leak shows up on the sill or the floor in a wind-driven rain; usually it is the flashing around the opening, not the glass. We spray-test it to prove which joint leaks.
- Electronic leak detection (ASTM D7877): Pinpoints breaches in deck and plaza membranes without flooding or demolition. A deck over a room is a roof you walk on: when its membrane or drains fail, the ceiling below tells you.
- Flood testing (ASTM D5957): Horizontal membranes held under water to prove they hold before finishes go back.
- Isolation water testing (roofs, flashing, parapets): The stain is rarely under the hole. Water runs along the framing before it drops. We trace it back with a controlled water test and fix the entry point, not the paint.
What you receive:
- Cause-of-loss report: dated, numbered photo log, findings, mechanism, recommended remedy.
- Moisture map and infrared survey on plan; test logs with locations and results.
- A bid-ready scope other contractors can price, or our proposal to build it.
- Written for insurers, counsel and building officials; the engineer of record is named separately.
Q: Can you find a deck leak without tearing up the deck?
A: Yes. Electronic leak detection to ASTM D7877 pinpoints breaches in deck and plaza membranes without flooding or demolition. Where finishes allow, flood testing to ASTM D5957 holds the membrane under water to prove it holds.
Q: My window leaks only in wind-driven rain. Can that be tested?
A: Yes. We spray-test it to ASTM E1105 and AAMA 501.2 to prove which joint leaks. Usually it is the flashing around the opening, not the glass: the sill pan, the head flashing or the perimeter sealant.
Q: What do I get after the testing?
A: A cause-of-loss report: dated, numbered photo log, findings, mechanism, recommended remedy; the moisture map and infrared survey on plan; test logs with locations and results; and a bid-ready scope other contractors can price, or our proposal to build it.
Q: Should I dry out a flooded room first, or document it first?
A: Do both the same day, in that order. Stop the water if it is safe, photograph everything and take moisture readings, then start drying. Most insurance policies expect you to limit the damage, and the adjuster will want proof of what was wet. L3 records the damage and runs the dry-out in one visit.
## Orange County coast (https://l3energyconstruction.com/orange-county-coast)
On the Orange County coast L3 works at the house in Seal Beach, Huntington Beach, Newport Beach, Corona del Mar, Laguna Beach, Laguna Niguel, Dana Point and Capistrano Beach, San Clemente.
## Capistrano Beach (https://l3energyconstruction.com/capistrano-beach)
Beach Road is one row of houses on the sand at the south end of Dana Point, on slab foundations behind private seawalls and patios, with the railroad at its back. Since Hurricane Marie's swell on August 28 the row has lost decks, patios, seawall sections and homes; after Tropical Storm Rachel the City's count was seven red-tagged and thirteen yellow-tagged. The seawall and the sand are the coastal engineer's and the City's problem. Everything from the seawall in is ours.
- Scour under the slab: When the sand in front of the wall goes, the sand under the house follows it. A slab on sand loses its bearing at the seaward edge first: new cracks, a floor that is no longer level, doors that bind. The deck that went into the surf on August 28 was undermined the same way.
- Seawater under the floor: Every high tide now reaches under the slab. Concrete is porous; seawater pushes up through cracks, joints and the slab edge, leaves a salt crust on the surface, and climbs the bottom plates of the walls. The room feels damp with no rain and no leak.
- The lower level after run-up: Where a patio or wall failed, wave run-up reached the lower level directly. Drywall, insulation and framing that took seawater grow mold within days unless they are opened and dried, and the salt stays in whatever is not removed.
Dana Point declared a local emergency on August 28, and the State's El Niño emergency of September 21 means an emergency coastal development permit for seawall repair is decided within 24 hours; it lasts 120 days and the follow-up permit still has to be won. Repairing the wall is the coastal engineer's design and the armoring contractor's build. We coordinate with both and document the house while they work.
Q: My Beach Road house is yellow-tagged. Can L3 work on it?
A: Yes, within what the tag allows. We document first: photographs, moisture readings and a moisture map of every floor and wall, dated, before anything is dried or torn out. Then the inside work: emergency dry-out, drainage and a sump to hold the water table under the slab, mold removal, and the envelope repairs. The seawall itself is the coastal engineer's design; we coordinate with that engineer and with the City's building official.
Q: The seawall held. Is the house fine?
A: Not necessarily. The sand under the slab and the seawater under the slab do not need a broken wall. The signs are a damp floor with no rain, a white salt crust on concrete, doors that bind, cracks that were not there in August. A moisture survey answers the question in a day.
Q: What should I have for the adjuster?
A: Dated photographs and video of the water line and of every wet room before drying; moisture readings; the City's tag notice; and a cause-of-loss report that says where the water came from and what it did. We write that report. Wave and flood damage is usually a flood-policy question and many homeowner policies exclude it; the documentation is what the adjuster or your attorney works from either way.
## Long Beach Peninsula (https://l3energyconstruction.com/long-beach-peninsula)
The Peninsula is the narrow strip of Long Beach between the open ocean and Alamitos Bay, with the boardwalk and a wooden bulkhead between the houses and the beach. Hurricane Marie's swell on September 8 took up to 10 feet of sand depth and breached the seawall and boardwalk; about 20 homes were evacuated. Tropical Storm Rachel came through the bulkhead on October 9: nine buildings at 13 addresses red-tagged on Seaside Walk, 64th to 66th Place evacuated. The City is trucking in sand and has fast-tracked an $11.4 million dredge. That rebuilds the beach. It does not dry a house.
- A sand spit has the tide under it: The Peninsula is sand, a few feet above the sea, with water on both sides. The groundwater under every lot rises and falls with the tide, ocean side and bay side alike, and this autumn the sea is running higher under every tide. Garages, ground-floor slabs and lower rooms get wet from below with no wave in sight.
- Run-up through the bulkhead: Where the bulkhead failed, the swell reached the houses directly. Seawater in drywall, insulation and framing has to be opened and dried within days; the salt stays in whatever is left in place and keeps drawing moisture.
- Sand loss under the slab: Ten feet of beach gone in front of a house means sand moving under it too. A slab or a footing that has lost its bearing shows as cracks, settlement and doors that bind. The survey finds it before the next swell does.
The City's sand program, 50,000 to 100,000 cubic yards trucked onto the Peninsula and a dredge of about 415,000 cubic yards, is public work on public timelines. It is the buffer, and it is the first thing the next swell takes. Our part is the house: documentation, drying, drainage, moisture under the slab and mold, coordinated with the City's building official on tagged addresses.
Q: We were evacuated. What do we do before we go back in?
A: Go in only when the City says you may, and photograph and video everything before anything is moved, dried or thrown out: the water line on the walls, every wet floor, the garage, the contents. Take moisture readings or have us take them. Then drying starts the same day. Our emergency dry-out crew does both in one visit and leaves you with a dated record.
Q: The sand is coming back. Does that fix the house?
A: It fixes the beach. The seawater that reached the slab, the walls and the framing has already done its work, and the groundwater under the Peninsula will keep following the tide whatever the beach looks like. The house needs its own answer: a moisture survey, drainage and a sump if the slab is taking water from below, and removal of what cannot be dried.
Q: Our address on Seaside Walk is red-tagged. What can L3 do now?
A: Document from outside and, with the building official's permission, inside; write the cause-of-loss report your adjuster and attorney will need; and plan the interior repair so it starts the day the tag allows. The bulkhead and the beach are the City's and the coastal engineer's; the inside of the house is ours.
## Newport Beach (https://l3energyconstruction.com/newport-beach)
On the morning of October 9 the high tide at Newport Beach ran 20 inches above the tide table, which the City's utilities director called record-breaking. Fifteen to twenty blocks of the Balboa Peninsula flooded, vehicles were stranded, and water stood at front doors. The City declared a local emergency. The sea is running 4 to 6 inches higher than the table under every tide this autumn, and the king tides fall on November 24 to 26, December 23 to 25 and January 21 to 22. The street drains when the tide turns. The ground under the house does not.
- Water under the slab from the street side: A flooded street is a flooded crawlspace and a wet slab. Water enters at the slab edge, through utility penetrations and up through the concrete, and it is seawater, so it leaves salt that keeps drawing moisture for months.
- The water table of the Peninsula is the harbor's: Balboa Peninsula and West Newport stand on sand a few feet above the sea, between the ocean and the harbor. Groundwater there follows the tide, and a block that saw no water in the street can still have it under the floor. Damp floors with no rain, white crust on the garage slab and musty rooms are the signs.
- Bottom plates and garages: Seawater at a front door is seawater in the bottom plate of the wall. Framing and drywall that stay wet grow mold within days; a garage slab that took the tide stays damp until the salt is dealt with.
Newport Beach has brought its replenishment forward: about 100,000 cubic yards of Santa Ana River sand to West Newport this month. That is the beach. The house is a moisture survey, drainage and a sump where the slab is taking water from below, membrane and sealing at the slab edge and penetrations, dry-out, and removal of what cannot be dried, with everything photographed and dated for the adjuster first.
Q: Water came up through the floor, not through the door. What is that?
A: Groundwater under the slab, pushed up by a sea that is higher than the tide table. Concrete is porous, and the push is about 64 pounds per square foot for every foot of seawater above the underside of the slab. A moisture survey finds where it is coming through; a drain and sump under or around the slab take the pressure off. It is not a plumbing leak unless the meter moves with every tap closed.
Q: What should we do before the November king tides?
A: Have the house surveyed now so the baseline is on record, then close the paths the survey finds: slab penetrations, the slab edge, the garage threshold, a sump where the water table is reaching the slab. Sandbags and the street are the City's; the house is what we can change in the weeks between now and November 24.
Q: Does L3 deal with the street flooding?
A: No. The street, the storm drains and the tide valves are the City's. We deal with what the water did once it reached the lot: under the slab, in the walls, in the garage, and the mold that follows.
## Malibu (https://l3energyconstruction.com/malibu)
On September 8 the swell from Hurricane Marie undermined Sea Level Drive: driveways collapsed into a 30-foot sinkhole, a gas line ruptured, five homes were red-tagged and more than 30 people were evacuated. On September 28 Malibu declared a local emergency two weeks before any storm, naming coastal erosion and flooding as the El Niño hazards to prepare for. Malibu's beachfront homes stand on sand, on caissons or on slabs behind seawalls; above them the bluff homes drain toward the sea. Both kinds of house get wet from the ground, and the ground is the part nobody can see.
- Scour under beach-level slabs: The void that swallowed a driveway on Sea Level Drive is the same process under a slab on sand: the swell pulls the sand out from under the seaward edge, the slab loses its bearing, and seawater fills the space it leaves at every high tide. Cracks, settlement and a damp floor with no rain are the signs.
- Bluff homes: water from the uphill side: A saturated bluff drains through the house below it. Retaining walls, planters and the slab edge on the uphill side take water under pressure after every storm, and the lower level shows it as damp walls, efflorescence and mold. The fix is drainage behind the wall and a membrane, not paint.
- Seawater in the lower level: Where run-up reached a lower level, the drywall, insulation and framing that took seawater have to be opened and dried within days. Salt stays in whatever is left in place.
Malibu's emergency declaration and the State's El Niño emergency mean emergency coastal permits for seawall and caisson repair are decided within 24 hours. That work is the coastal and geotechnical engineers' design. Our part is the house: the moisture survey, drainage behind retaining walls and under slabs, dry-out, mold, and the documentation that the adjuster, the City and your attorney will ask for.
Q: There is a void under the driveway. Is the house next?
A: The void and the slab share a cause, so the question is fair. Your geotechnical engineer maps the voids; we map the moisture and the water paths under and inside the house and coordinate the two. If the slab is taking seawater, drainage and a sump hold the water table under it while the engineers deal with the ground.
Q: We were red-tagged on September 8. What can L3 do now?
A: Document from outside and, with the building official's permission, inside; write the cause-of-loss report; and plan the interior repair so it starts the day the tag allows. Nothing is torn out before it is photographed and measured.
Q: Our house is on the bluff, not the beach. Does this apply?
A: Yes, from the other direction. A winter of El Niño rain on a bluff puts water behind every retaining wall and under every uphill slab edge. Lower levels that were dry for years get wet from the hill side. Drainage behind the wall, a membrane and a sump are the usual answer, after the survey says where the water is coming through.
## Laguna Beach (https://l3energyconstruction.com/laguna-beach)
On September 10 Laguna Beach declared a local emergency: six oceanfront homes on Ocean Way and Lagunita were yellow-tagged with compromised seawalls. On October 13 the bluff at El Morro cracked under Coast Highway; one southbound lane has been closed since, and on October 19 Caltrans filed an emergency notice for temporary slope and roadway stabilization near Morro Ridge Road. Laguna's oceanfront homes sit behind private seawalls with the hillside draining down toward them. The sea and the hill both put water into a house from below.
- Seawater behind a compromised wall: A seawall that has lost its face or its footing lets seawater and sand move behind it at every high tide. The slab and the lower walls behind it take that water first: a damp floor with no rain, a white salt crust on concrete, a lower level that smells of the sea.
- The hillside drains through the house: A saturated hillside drains through the house below it. Retaining walls, planters and the slab edge on the uphill side take water under pressure after every storm, and the lower level shows it as damp walls, efflorescence and mold. The fix is drainage behind the wall and a membrane, not paint.
- Seawater in the lower level: Where run-up reached a lower level, the drywall, insulation and framing that took seawater have to be opened and dried within days. Salt stays in whatever is left in place.
Laguna Beach's local emergency and the State's El Niño emergency of September 21 mean an emergency coastal development permit for seawall repair is decided within 24 hours; it lasts 120 days and the follow-up permit still has to be won. The wall is the coastal engineer's design and the armoring contractor's build; Coast Highway at El Morro is Caltrans's. Our part is the house: the moisture survey, drainage behind retaining walls and under slabs, dry-out, mold, and the documentation the adjuster and the City will ask for.
Q: Our house on Ocean Way was yellow-tagged. Can L3 work on it?
A: Yes, within what the tag allows. We document first: photographs, moisture readings and a moisture map of every floor and wall, dated, before anything is dried or torn out. Then the inside work: emergency dry-out, drainage and a sump to hold the water table under the slab, mold removal, and the envelope repairs. The seawall itself is the coastal engineer's design; we coordinate with that engineer and with the City's building official.
Q: The seawall held. Is the house fine?
A: Not necessarily. The sand under the slab and the seawater under the slab do not need a broken wall. The signs are a damp floor with no rain, a white salt crust on concrete, doors that bind, cracks that were not there before the storms. A moisture survey answers the question in a day.
Q: What should I have for the adjuster?
A: Dated photographs and video of the water line and of every wet room before drying; moisture readings; the City's tag notice; and a cause-of-loss report that says where the water came from and what it did. We write that report. Wave and flood damage is usually a flood-policy question and many homeowner policies exclude it; the documentation is what the adjuster or your attorney works from either way.
## San Clemente (https://l3energyconstruction.com/san-clemente)
San Clemente puts its sand deficit at 2 to 4 million cubic yards, and on October 1 it sent Measure M, a 1% sales tax for sand and fire protection, to November's ballot. In September high tides and waves overtopped the beachfront rail tracks and stopped Metrolink, Amtrak and freight service; ahead of the October 26 to 28 tides Metrolink suspended Orange County Line service between Laguna Niguel/Mission Viejo and Oceanside for October 26 to 30. A thinner beach puts the sea closer to every slab, wall and planter behind it.
- Less beach, more water under the slab: Every high tide now reaches under the slab. Concrete is porous; seawater pushes up through cracks, joints and the slab edge, leaves a salt crust on the surface, and climbs the bottom plates of the walls. The room feels damp with no rain and no leak.
- Bluff and hillside homes: A saturated bluff drains through the house below it. Retaining walls, planters and the slab edge on the uphill side take water under pressure after every storm, and the lower level shows it as damp walls, efflorescence and mold. The fix is drainage behind the wall and a membrane, not paint.
- Seawater in the lower level: Where run-up reached a lower level, the drywall, insulation and framing that took seawater have to be opened and dried within days. Salt stays in whatever is left in place.
The sand is the City's: the deficit, Measure M and the replenishment it would fund are public work on public timelines. The rail corridor is Metrolink's and the railroad's. The State's El Niño emergency of September 21 means emergency coastal permits for seawall repair are decided within 24 hours; that wall is the coastal engineer's design. Our part is the house: documentation, drying, drainage, moisture under the slab and mold.
Q: The sand is coming back. Does that fix the house?
A: It fixes the beach. The seawater that reached the slab, the walls and the framing has already done its work, and the groundwater under the beachfront will keep following the tide whatever the beach looks like. The house needs its own answer: a moisture survey, drainage and a sump if the slab is taking water from below, and removal of what cannot be dried.
Q: What should we do before the November king tides?
A: Have the house surveyed now so the baseline is on record, then close the paths the survey finds: slab penetrations, the slab edge, the garage threshold, a sump where the water table is reaching the slab. Sandbags and the street are the City's; the house is what we can change in the weeks between now and November 24.
Q: What should I have for the adjuster?
A: Dated photographs and video of the water line and of every wet room before drying; moisture readings; the City's tag notice; and a cause-of-loss report that says where the water came from and what it did. We write that report. Wave and flood damage is usually a flood-policy question and many homeowner policies exclude it; the documentation is what the adjuster or your attorney works from either way.
## The siege log (updated 2026-10-26)
September was the preview. Rachel was the first act.
Hurricane Marie's swell, Aug 28 to Sep 15, before El Niño had properly started. Then Tropical Storm Rachel, Oct 9 to 12, on a sea already running higher than the tide table. Every one of these lots has a house behind the seawall with the same question: what did the water do inside?
Current conditions:
- NOAA El Niño Advisory (Oct 8): strong-to-very strong El Niño likely through Jan–Mar (>83%); 83% chance Oct–Dec is the strongest since 1950 · next update Nov 12 — https://www.cpc.ncep.noaa.gov/products/analysis_monitoring/enso_advisory/ensodisc.shtml
- Tropical Storm Rachel (Oct 9–12): Newport Beach's morning tide ran 20 in above the table; Long Beach Peninsula and Capistrano Beach red-tagged again — https://abc7.com/story/high-tide-tropical-storm-rachel-floods-newport-beach-streets-residents-brace-more-impacts/19925067/
- Kelvin wave (October): sea level +4 in now, about +6 in later this month, holding for months — https://www.accuweather.com/en/climate/kelvin-wave-heads-for-us-west-coast-adding-to-californias-coastal-erosion-threat/1942345
- California El Niño emergency (Sep 21): emergency coastal permits decided within 24 h — https://beacon.ca.gov/news/governor-newsom-proclaims-state-of-emergency-to-bolster-statewide-el-nino-preparedness-protect-california/
- King tides: Oct 26–28 · Nov 24–26 · Dec 23–25 · Jan 21–22 — https://www.coastal.ca.gov/kingtides/participate.html
Dated entries:
- 2026-08-28 · Capistrano Beach, Beach Road: First red tag. A deck destroyed, and coastal erosion undermined the slab foundation beneath it. Sources: ABC7 ; NTD
- 2026-09-08 · Malibu, Sea Level Drive: Driveways collapsed into a 30-foot sinkhole; a gas line ruptured; five homes red-tagged, more than 30 people evacuated. Sources: CBS Los Angeles
- 2026-09-08 · Long Beach Peninsula: About 20 homes evacuated. The wooden seawall and boardwalk breached; up to 10 feet of sand depth gone. Sources: Long Beach Post ; LAist
- 2026-09-10 · Laguna Beach, Ocean Way and Lagunita: Local emergency. Six oceanfront homes yellow-tagged with compromised seawalls. Sources: NTD ; AccuWeather
- 2026-09-10 · Carlsbad: Bluff-stabilization emergency declared to extend the revetment before El Niño storms. Sources: KPBS
- 2026-09-15 · Capistrano Beach: Ten homes red-tagged, seven yellow-tagged. Seawalls failed, patios went into the ocean. Sources: ABC7 ; CBS Los Angeles
- 2026-09-21 · Statewide: El Niño state of emergency. Emergency coastal permits now decided within 24 hours; they last 120 days and the follow-up permit still has to be won. Sources: Governor's proclamation ; Coastal Commission
- 2026-09-28 · Malibu: Local emergency declared two weeks before any storm, naming coastal erosion and flooding as the El Niño hazards to prepare for. Sources: LAist
- 2026-10-01 · San Clemente and Newport Beach: San Clemente puts its sand deficit at 2 to 4 million cubic yards and sends Measure M, a 1% sales tax for sand and fire protection, to November's ballot. Newport Beach brings its replenishment forward: about 100,000 cubic yards of Santa Ana River sand to West Newport later this month. Sources: Voice of OC
- 2026-10-06 · The whole coast: The Kelvin wave arrives. Sea level off California up to 4 inches above normal in early October, about 6 inches later in the month, under every tide that follows. Sources: AccuWeather
- 2026-10-08 · NOAA: El Niño Advisory, strengthening: a strong-to-very strong El Niño is likely through January–March (more than 83%), Niño-3.4 at +2.1 °C, and an 83% chance that October–December exceeds every El Niño since 1950. Next update Nov 12. Sources: NOAA Climate Prediction Center
- 2026-10-09 · Newport Beach, Balboa Peninsula: Local emergency. The morning high tide came in 20 inches above the prediction, which the city's utilities director called record-breaking; 15 to 20 blocks flooded, vehicles stranded, water at front doors. Sources: ABC7
- 2026-10-09 · Long Beach Peninsula: Rachel's swell broke through the boardwalk bulkhead that Hurricane Marie had stripped of sand. Nine buildings, 13 addresses, red-tagged on Seaside Walk; 64th to 66th Place evacuated. The City fast-tracks 50,000 to 100,000 cubic yards of trucked sand and an $11.4 million dredge of about 415,000 cubic yards. Sources: Long Beach Post, Oct 9 ; Long Beach Post, Oct 11
- 2026-10-12 · Capistrano Beach, Beach Road: Another home went into the surf; seven red-tagged and thirteen yellow-tagged after Rachel. The houses sit on slabs on sand, and the sand is going. Sources: ABC7
- 2026-10-14 · Long Beach Peninsula: A crane set about 74 sandbags of 3,000 pounds each, and staging began for the accelerated dredge. The City's Oct 16 count: seven buildings, 12 residences, red-tagged and two yellow-tagged. Sources: City of Long Beach, Oct 16
- 2026-10-19 · Newport Beach: Local emergency ahead of the Oct 26–28 king tides, with ocean levels running 18 to 22 inches above predicted tides. The council approved the contract for about 100,000 cubic yards of Santa Ana River sand between 36th and 62nd streets. Sources: MyNewsLA, Oct 19 ; FOX 11 Los Angeles, Oct 20 ; City of Newport Beach, Oct 16
- 2026-10-19 · Malibu, Westward Beach Road: Overnight erosion on Oct 19 closed Westward Beach Road at Birdview Avenue; a Los Angeles County contractor placed rock and the City reported the road open again on Oct 20. The road beyond the pay gate and the Point Dume Beach lot have been closed since Aug 1. Sources: City of Malibu Alert Center, Oct 20 ; Hoodline, Oct 20
- 2026-10-19 · Laguna Beach, El Morro: Caltrans filed an emergency notice for the Crystal Cove Coastal Access Preservation Project: temporary slope and roadway stabilization and wave-energy-dispersing devices on Coast Highway near Morro Ridge Road, under the Sep 21 state emergency. One southbound lane has been closed since the bluff cracked on Oct 13, and the beach below is closed. Sources: CEQAnet, Notice of Exemption 2026100640, Oct 19 ; Patch Laguna Beach, Oct 13 ; Surfer, Oct 20
- 2026-10-22 · San Clemente, rail corridor: Metrolink suspended Orange County Line service between Laguna Niguel/Mission Viejo and Oceanside for Oct 26–30, ahead of the king tides on the beachfront tracks at San Clemente; trains run only between Los Angeles Union Station and Laguna Niguel/Mission Viejo, with no replacement buses. In September high tides and waves overtopped the same tracks and stopped Metrolink, Amtrak and freight service. Sources: NBC Los Angeles, Oct 22 ; MyNewsLA, Oct 22
- 2026-10-25 · The whole coast: The Weather Service put the Orange and San Diego County coasts under a coastal flood warning and the Los Angeles and Ventura County beaches under a coastal flood advisory, Sunday 5 a.m. through Thursday 1 p.m., for morning high tides of 7.5 to 8 feet Monday through Wednesday, running 1 to 1.7 feet above the tide table; its statement said "numerous roads may be closed" and low-lying homes and businesses would be inundated. The tides could challenge the San Pedro record of 7.93 feet, set Jan 10, 2005. Sources: NWS San Diego coastal flood warning, Oct 26 (relay) ; Times of San Diego, Oct 25 ; NBC Los Angeles, Oct 25 ; Los Angeles Times via Yahoo, Oct 25 ; ABC7, Oct 25