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Crawl Space Insulation Replacement

Cold floors in winter. Hot rooms in summer. A power bill that keeps climbing. The fix isn't always inside your house โ€” half the time it's the saggy, wet, rodent-damaged insulation hanging in your crawl space.

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When to Replace

Signs Your Crawl Space Insulation Is Done

  • Falling down or sagging โ€” once batts have lost contact with the sub-floor they no longer insulate
  • Wet, soggy, or compressed โ€” water-damaged insulation has zero R-value
  • Rodent or pest activity โ€” droppings, nests, or chewed sections contaminate the entire batt
  • Mold growth โ€” black or fuzzy patches mean the insulation is now feeding the problem
  • Cold floors year after year โ€” even if it looks intact, old insulation may be settled or compressed
  • Recent flooding or plumbing leak โ€” wet fiberglass should always be replaced, not dried in place

If any of these apply, your crawl space is costing you 10-20% of your monthly energy bill โ€” and possibly affecting your indoor air quality.

BEFORE SAGGED ยท WET ยท DAMAGED AFTER CLEAN ยท DRY ยท CODE
Insulation Options

Three Approaches, Right Choice For Your Home

Closed-Cell Spray Foam

Premium option for encapsulated crawl spaces. Sprays directly onto foundation walls.

  • R-7 per inch
  • Air seal + insulation in one
  • Doesn't sag, fall, or absorb water
  • Best long-term value

Rigid Foam Board

Excellent insulation for foundation walls in sealed crawl spaces. Mid-tier price.

  • R-5 per inch
  • Mechanically fastened
  • Vapor-resistant
  • Long lifespan

Fiberglass Batts

Standard option for vented crawl spaces. Installed between joists with proper retention.

  • R-19 to R-30 options
  • Most economical
  • Code-compliant for vented spaces
  • Wire mesh retention included
What's Included

Full-Service Replacement

  • Removal of existing insulation โ€” including any contamination, mold, or rodent damage
  • Inspection of joists and sub-floor โ€” we flag any structural issues we see
  • Disposal โ€” old materials hauled away, your driveway stays clean
  • Air sealing โ€” gaps and penetrations are sealed before new insulation goes in
  • New code-compliant insulation โ€” sized for your space and configuration
  • Wire mesh retention โ€” so it stays in place permanently
  • Final walk-through โ€” we send you photos of the finished work
Cost & Savings

What to Expect

$2K-$8KTypical RangeDepends on material & size
10-20%Energy SavingsTypical HVAC reduction
1-2Days On-SiteMost jobs same-day
โˆžLifetime WarrantyWorkmanship guarantee

For most homeowners, new insulation pays for itself within 4-7 years through energy savings alone.

FAQ

Insulation Questions

Depends on whether your crawl space is encapsulated. In a sealed (encapsulated) crawl space, insulation goes on the foundation walls. In a vented crawl space, insulation goes between the floor joists.

Properly installed and protected from moisture: 25-50+ years.

We don't recommend it. If the old insulation is wet, moldy, or contaminated, layering new on top traps the contamination against your sub-floor.

Most homes see 10-20% reduction in heating and cooling costs. Older homes with no working insulation can see more.

Yes โ€” if the cold floors are caused by missing or failing insulation. We'll diagnose during inspection so you don't pay for the wrong fix.

Often Combined With

Lower Bills. Warmer Floors. Cleaner Air.

Most homeowners are surprised what a difference fresh insulation makes โ€” both in comfort and in their utility bills.

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