FoundationRepair.Engineered.
We're a Copiague crew that stabilizes Long Island foundations the right way — carbon fiber, helical and push piers, real engineering. 2,100+ homes since 2008. We don't paper over cracks.
Seven Foundation
Fixes. Every Day.
We don't do roofs, kitchens, or additions. We stabilize foundations, stop water, and document it with engineered drawings.
Foundation Crack Repair
We read every crack before we pick a fix. Vertical hairline in a settled wall gets epoxy injection. Horizontal or stair-step crack in an active wall gets carbon fiber or piers — injection alone will fail. Written diagnosis on every job.
Basement Wall Repair
Bowing, leaning, or cracked basement walls are a structural emergency. We stop inward movement with carbon fiber straps on mild bows and full steel wall-anchor systems on severe cases. Every system engineered for actual soil pressure.
Helical & Push Piers
When a foundation is settling, piers are the permanent fix. Supportworks-certified dealer. Every pier engineered to load-capacity, hydraulically installed to load-bearing strata, lifetime warranty that follows the home when you sell.
Carbon Fiber Wall Reinforcement
Ten times stronger than steel by weight, bonded permanently to concrete with structural epoxy. For bowing walls under 2 inches of deflection, the cleanest, fastest, most permanent repair. No excavation. Done in a day.
Foundation Waterproofing
Interior French drain, exterior membrane, sump systems, and vapor barriers. We solve the water problem so the structural problem doesn't come back. Paired with hydrostatic-pressure analysis and written guarantee against seepage.
Crawl Space Repair
Encapsulation, vapor barriers, support posts, joist sistering, and moisture control. Long Island crawl spaces rot framing and destroy air quality — we seal, support, and ventilate them correctly the first time.
Settlement Repair
Sticking doors, sloped floors, stair-step brick cracks — all signs of differential settlement. We diagnose the underlying soil condition, design a pier system to the load, and lift the structure back toward original elevation.
The Guy With the PE
On Speed Dial.
Sal Benedetto started this crew in 2008 after watching neighbors lose thousands on crack injections that failed within a winter. Today we run 16 structural crew and a licensed Professional Engineer on staff — so your repair is engineered, not guessed.
Engineered. Documented.
Warrantied.
PE on staff. Every repair engineered.
A licensed New York Professional Engineer reviews every non-trivial repair and signs the plan. Your repair is engineered, not guessed.
Supportworks-certified dealer.
ICC-ES code-compliant piers, tested load capacity, lifetime warranty that follows the home when you sell.
We tell you when you don't need us.
About 18% of homeowners who call have cosmetic cracks that need monitoring, not repair. We'd rather lose a $500 injection job than sell you a $20K pier system you didn't need.
Licensed, insured, fully backed.
Nassau HIC #H2811400000. Suffolk HIC #61442-H. $2M GL. Workers comp on every man. Supportworks certified. BBB A+.
Sal answers. Maria answers.
No call center. No chatbot. 7am–6pm Mon-Sat you get Maria in the office or Sal on the job. Nights and weekends leave a message.
The crew lives here.
Every structural tech lives on Long Island. We know the soil — glacial outwash on the south shore, dense clay on the north — because we've stabilized homes on both.
Real Repairs.
Documented.
Every photo is a Long Island foundation we stabilized. Before the diagnosis. After the engineer signed off.
4.9★ · 214 Reviews
“Two other foundation guys quoted us crack injection for $3,500. Sal spent 40 minutes in the basement with a laser level and told us it was actual settlement — we needed piers, not injection. Saved us tens of thousands in eventual damage.”
“Our 1952 Levittown cape had a basement wall bowing an inch and a half. Sal's team installed six carbon fiber straps in one day. No excavation, no mess. Two winters later and the wall hasn't moved a millimeter. The engineering report came stamped by their PE.”
“We tried two waterproofing companies before LI Foundation Co. Both just moved water around. Sal designed an interior French drain with twin sumps — bone dry through Ida, two nor'easters, and last March's flooding. Completely different league.”
Nassau + Suffolk.
That's the Map.
Nassau County
Hempstead · Freeport · Oceanside · Levittown · Baldwin · Hicksville · Long Beach · Massapequa · + every town in between.
Suffolk County
Copiague · Babylon · Bay Shore · Islip · Patchogue · Huntington · Smithtown · Sayville · + every town in between.
Straight Answers.
01How much does foundation repair cost on Long Island?+
02Does homeowners insurance cover foundation repair?+
03How do I know if my cracks are serious?+
04What's the difference between crack injection and engineered repair?+
05Are you really licensed and insured?+
Get a Real
Diagnosis.
Tell us your address and where the cracks or settling are. We'll call within 4 business hours to schedule an on-site assessment. The assessment is free. The engineer's written report is included. No pitch at the end.
- Free on-site structural assessment
- Written engineering-backed diagnosis
- No high-pressure sales tactics
- Financing available · decision in 60 seconds