Vetted Sill Plate Replacement Experts in St. Louis
Foundation-level structural repairs from licensed specialists—not handymen.
Your Entire House Rests on the Sill Plate
The sill plate is where your home meets your foundation. When it fails, everything above it is at risk. This isn't a job for someone who "does a little carpentry."
Sill plate replacement requires temporarily supporting the structure, removing the damaged wood, treating for moisture and pests, and installing new pressure-treated lumber with proper flashing. One mistake can crack your foundation or shift your walls.
The contractors in our directory have documented experience in foundation-level structural repairs. They understand load transfer, moisture barriers, and building code requirements for structural wood replacement.
Why Our Vetting Process Matters
- 🛡️Licensed & Insured
Every contractor carries structural work endorsements and minimum $1M liability coverage.
- 🏗️Foundation Repair Experience
Only contractors with proven experience in foundation-level structural work are listed.
- ⭐Verified Project History
We verify completed sill plate projects with before/after documentation.
- 📋Code Compliance
All contractors are verified for proper permitting and inspection procedures.
Warning Signs of Sill Plate Damage
- Gaps between foundation and siding
- Doors or windows that stick or won't close
- Visible rot or insect damage at the base of exterior walls
- Musty odors near the foundation
- Sloping floors near exterior walls
- Cracks in interior drywall near floor level
- Pest activity (termites, carpenter ants) near foundation
Frequently Asked Questions
What is a sill plate and why does it matter?
The sill plate is the first piece of wood that sits directly on your foundation. It supports your entire house structure. When it rots, your walls can shift, floors can sag, and doors/windows stop working properly.
How much does sill plate replacement cost?
Sill plate replacement in St. Louis typically costs $100-$200 per linear foot, or $5,000-$15,000+ for a typical home. Costs vary based on accessibility, the need to temporarily support the structure, and extent of damage.
How do I know if my sill plate needs replacement?
Signs include: gaps between the foundation and siding, doors/windows that stick or won't close, visible rot or insect damage at the base of walls, musty odors near the foundation, or a sloping floor near exterior walls.
Can sill plate damage be repaired or does it need full replacement?
Minor damage can sometimes be treated with epoxy consolidants. However, if more than 30% of the sill plate is compromised, full replacement is usually necessary to ensure structural integrity.
Foundation-Level Repairs Require Foundation-Level Expertise
Get matched with a sill plate specialist who has done this work hundreds of times—not someone learning on your house.