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/// Service

Carbon Fiber Wall Reinforcement

Carbon fiber reinforcement is the cleanest permanent repair for bowing basement walls on Long Island. The material is ten times stronger than steel by weight, and once bonded to prepared concrete with structural epoxy, it becomes structurally continuous with the wall itself. There is no excavation, no yard destruction, and most installations finish in a single day. Long Island homeowners commonly need carbon fiber when lateral soil pressure from clay or saturated sandy soils pushes block walls inward — a condition we see regularly in Nassau and Suffolk's post-war housing stock. Carbon fiber straps are the standard of care for walls showing up to two inches of inward deflection. Each strap runs $650 to $1,100 installed, and every job carries a lifetime material warranty.

Book Free Assessment (516) 529-6996
/// What's included

Engineered. Documented. Warrantied.

  • 01Structural-grade carbon fiber, 10× the tensile strength of steel by weight
  • 02Epoxy-bonded directly to prepared concrete — full structural continuity
  • 03No excavation, no yard destruction, no re-grading
  • 04Installed in a single day on most jobs
  • 05Lifetime material warranty, 10-year workmanship warranty
Carbon Fiber Wall Reinforcement
/// Typical investment
$650 – $1,100 per strap
Exact number after on-site assessment.
/// Process

4 Steps. No Theatre.

01

Prep

Concrete surface ground and cleaned to profile for adhesion. Cracks widened and filled where needed.

02

Saturate

Carbon strap saturated in two-part structural epoxy before install — this is the step cheap crews skip.

03

Apply

Strap pressed vertically, floor-to-ceiling, anchored top and bottom, air-rolled to remove voids.

04

Cure

24-hour cure. Strap becomes structurally continuous with the wall, not a sticker on top of it.

/// Questions

FAQ.

01Is this a permanent fix?+
For bowing under 2 inches, yes — it's as permanent as concrete itself once cured. We monitor at 30 and 90 days to verify zero movement.
02Can I finish the basement after?+
Yes. Straps are flush and can be drywalled over. Many clients paint them and leave them visible as a trust signal when they sell.
03How much does carbon fiber strap installation cost in Nassau County?+
Carbon fiber strap installation in Nassau County runs $650–$1,100 per strap installed, including surface prep, structural epoxy saturation, and application. A typical bowing basement wall in Nassau County requires 3–6 straps, placing total project cost at $2,000–$6,500. Walls with severe deflection or multiple affected sections run toward the higher end. We provide a written fixed-price estimate after the free on-site assessment — no changes after you sign.
04How many carbon fiber straps does my basement wall need?+
Strap count is determined by wall length, block height, and measured deflection — not a standard formula. Our PE-signed assessment measures deflection at six points per wall and sizes the strap count to achieve structural stability at twice working load. Most residential block basement walls in Nassau and Suffolk County require one strap per 4 linear feet of wall. A standard 20-foot basement wall with moderate bowing typically takes 5 straps.
05What is the difference between carbon fiber straps and wall anchors?+
Carbon fiber straps are the right choice when wall deflection is under 2 inches and the soil pressure can be stopped without additional soil movement. They require no excavation, install in a single day, and the strap becomes structurally continuous with the wall. Wall anchors are better for more severe deflection (over 2 inches) or when future tightening may be needed — anchors are threaded through the wall to exterior plates and can be re-tensioned over time. We assess which system is appropriate at the free inspection and explain the tradeoffs before any work starts.
06How do I know if I need carbon fiber strips on my basement walls?+
Look for horizontal cracks running across the middle of the block wall, an inward curve when you sight down the wall from the corner, or any walls your inspector flagged for deflection. Run a 4-foot level vertically against the wall: any gap at center indicates bowing. Active horizontal cracks that have grown since you first noticed them are a more urgent signal. Our free on-site assessment uses a laser and plumb line to measure actual deflection and tell you definitively whether carbon fiber is appropriate or a more intensive repair is needed.
/// Related Services

The Other Six Fixes.

01
Crack Repair
02
Wall Repair
03
Pier Systems
04
Waterproofing
05
Crawl Space
06
Settlement
/// Book

Free Assessment.
Engineered Report.

A LI Foundation Co. tech will be on-site within a week. Assessment is free, report is included, no pitch at the end.

(516) 529-6996
/// Request

Assessment Request

No sales pitch. No “today only” nonsense. We call back within 4 business hours. Prefer to talk? (516) 529-6996