Compare Top Rated Floor Joist Repair Pros in St. Louis
Vetted structural specialistsānot handymen or general contractors.
Don't Trust Your Foundation to a Handyman
A sagging floor isn't cosmeticāit's structural. And floor joist repair is one of the most commonly botched jobs in home repair.
Here's the problem: Most homeowners call a handyman or general contractor. They sister a joist, slap on some wood filler, and collect their check. Six months later? The sag is back, and now you're paying twice.
Floor joist damage requires a structural repair specialist who understands load paths, moisture mitigation, and proper sistering techniques. The pros in our directory focus exclusively on structural wood repairsānot painting, not drywall, not "a little bit of everything."
Why Our Vetting Process Matters
- š”ļøLicensed & Insured
Every contractor is verified for active state licensing and carries minimum $1M liability insurance.
- š§Structural Specialists Only
No generalists. Only contractors who specialize in load-bearing repairs and pass our expertise review.
- āVerified Reviews
Real reviews from real homeowners. We verify every review against completed projects.
- š5+ Years Experience
Minimum 5 years of documented structural repair experience required for listing.
Warning Signs of Floor Joist Damage
- Floors that bounce, sag, or feel "spongy" when you walk
- Visible cracks in drywall near the floor line
- Doors that no longer close properly
- Musty smell from crawl space (moisture = rot)
- Visible wood damage on exposed joists in basement/crawl space
- Uneven or sloping floors
Frequently Asked Questions
How much does floor joist repair cost in St. Louis?
Floor joist repair in St. Louis typically costs $300-$1,000 per joist for sistering, or $5,000-$15,000+ for full replacement of multiple joists. Costs vary based on accessibility, extent of damage, and whether moisture mitigation is needed.
How do I know if my floor joists need repair?
Warning signs include sagging or bouncy floors, visible cracks in drywall near the floor line, doors that no longer close properly, a musty smell from the crawl space, or visible wood damage on exposed joists in the basement or crawl space.
Can I repair floor joists myself?
Floor joist repair is structural work that requires understanding of load paths, proper sistering techniques, and moisture mitigation. DIY repairs often fail and can make damage worse. Always hire a licensed structural repair specialist.
How long does floor joist repair take?
Most floor joist repairs take 1-3 days depending on the number of joists affected and accessibility. Full replacement of a crawl space joist system may take 1-2 weeks.
Don't Wait Until a Sagging Floor Becomes a Structural Failure
Get matched with a licensed floor joist repair specialist who does this work every dayānot once a year.