Flooring
Underlayment
Underlayment is a thin layer of material installed between subfloor and finished flooring, providing cushioning, sound reduction, moisture protection, and minor leveling. Different flooring types require specific underlayment materials optimized for their properties.
Beyond cushioning, underlayment plays critical roles in moisture management (preventing damage from concrete moisture vapor), sound control (reducing transmission between floors), and thermal insulation. Proper underlayment selection and installation significantly affects flooring performance and longevity.
Key Characteristics
- ✓Cushioning layer
- ✓Sound absorption
- ✓Moisture barrier
- ✓Minor leveling capability
- ✓Material-specific types
- ✓Essential for floating floors
Types & Variations
Foam underlayment (basic)
Cork underlayment (premium)
Rubber underlayment (sound control)
Combination (attached vapor barrier)
Plywood underlayment (leveling)
Works Well With These Styles
Placement & Usage Tips
Match underlayment to flooring manufacturer recommendations. Never double up underlayment unless specified. Seal seams in moisture-prone applications.
💡 Pro Tip
Some flooring products come with attached underlayment—using additional underlayment can void warranties and create installation problems. Check flooring specifications before purchasing separate underlayment.