Subfloor Repair Calculator
Calculate materials and costs for subfloor repair projects. Determine plywood sheets, screws, adhesive, and total project cost for your floor repair.
Step 1: Room & Damage Specifications
Subfloor Repair Formula
Total Area = Length × Width (sq ft)
Repair Area = Total Area × (Damage % / 100)
Plywood Sheets = Repair Area ÷ 32 (for 4×8 sheets)
Step 2: Material & Cost Options
Standard Material Quantities
• Screws: 1.5 lbs per 4×8 sheet
• Adhesive: 1 tube per 2 sheets
• Waste factor: 10-15% extra material
• Labor: 2-4 hours per 100 sq ft
Subfloor Repair Cost Breakdown
Total Project Cost
Required Materials List
| Material | Quantity | Unit Cost | Total Cost |
|---|
Additional Recommended Items
• Circular saw or jigsaw
• Safety glasses and gloves
• Tape measure and chalk line
• Pry bar for removal
• Leveling compound (if needed)
Subfloor Installation Tips
Preparation Tips
1. Remove all flooring material down to the subfloor
2. Inspect and mark all damaged areas
3. Check joist condition and spacing (typically 16″ on center)
4. Ensure proper ventilation during adhesive application
Installation Guidelines
• Stagger plywood seams for maximum strength
• Leave 1/8-inch gap between sheets for expansion
• Use proper subfloor screws (not drywall screws)
• Apply adhesive to joists before laying plywood
• Screw every 6-8 inches along joists
• Check for level and make adjustments
Safety & Inspection
• Wear dust mask when cutting plywood
• Check for squeaks by walking on repaired areas
• Ensure all screws are countersunk properly
• Allow adhesive to cure according to manufacturer instructions
• Test for level across the entire floor
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