COMPARATIVE R-VALUES OF FLOORING AND SUBFLOORS
| Material | Thickness | R-Value |
| WOOD | ||
| Plywood | 3/4" | R-1.06 |
| OSB | 3/4" | R-1.19 |
| Engineered Wood | 1/4" | R-0.25 |
| Engineered Wood | 3/8" | R-0.38 |
| Engineered Wood | 5/8" | R-0.63 |
| Engineered Wood | 3/4" | R-0.75 |
| MDF/Plastic laminate | 1/2" | R-0.50 |
| Engineered Bamboo | 3/4" | R-0.72 |
| Cork tile | 1/4" | R-0.28 |
| Cork/MDF/laminate | 1/2" | R-1.18 |
| Oak | 3/4" | R-0.64 |
| Ash | 3/4" | R-0.68 |
| Maple | 3/4" | R-0.66 |
| Pine | 3/4" | R-0.71 |
| Fir | 3/4" | R-0.77 |
| TILE/STONE | ||
| Ceramic tile | 1/4" | R-0.02 |
| Concrete | 2" | R-0.32 |
| Thinset | 1/8" | R-0.01 |
| Gypsum | 1-1/2" | R-0.31 |
| Brick | 1-1/2" | R-0.26 |
| Marble | 1/2" | R-0.05 |
| Granite | 1/2" | R-0.05 |
| VINYL/RUBBER | ||
| Sheet vinyl | 1/8" | R-0.05 |
| Linoleum | 1/8" | R-0.05 |
| Rubber | 1/8" | R-0.05 |
| CARPET | ||
| Nylon low | 1/8" | R-0.65 |
| Nylon plush | 1/4" | R-1.12 |
| Nylon saxon | 1/2" | R-1.96 |
| Nylon plush | 5/8" | R-1.83 |
| Nylon shag | 1-1/4" | R-2.46 |
| Acrylic level loop | 1/4" | R-1.03 |
| Acrylic plush | 1/2" | R-1.71 |
| Polyester plush | 1/4" | R-0.95 |
| Polyester high-low | 1/2" | R-1.66 |
| Wool low | 1/4" | R-1.50 |
| Wool plush | 1/2" | R-2.19 |
| PAD | ||
| Slab rubber | 1/4" | R-0.62 |
| Waffled sponge rubber | 7/16" | R-0.78 |
| Hair & jute coated | 7/16" | R-1.71 |
| Bonded polyurethane | 3/8" | R-1.55 |
| Bonded polyurethane | 1/2" | R-2.09 |
| Prime polyurethane | 3/8" | R-1.58 |
| Prime polyurethane | 1/2" | R-2.01 |
| Frothed polyurethane | 3/8" | R-1.20 |
| Frothed polyurethane | 1/2" | R-1.61 |
| Floating floor pad | 1/8" | R-0.20 |
