Acronyms & Abbreviations
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Contracts - Forms & Schedules
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Disclaimer
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Estimating & Project Management
Glossary
of Terms
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Loss Recovery Guide with Standards
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p1m-Links
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p1mX-CAT
IndexesSM
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Supply Chain
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Average Material R-Values |
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Material |
Thickness |
R -Value |
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Air Spaces: |
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| Air space, bound normal materials 3-1/2" stud wall | 3/4" | 0.91 |
| Exterior air film | - | 0.17 |
| Interior air film | - | 0.68 |
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Masonry: |
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| Concrete block | 8" | 1.11 |
| Concrete block | 12" | 1.28 |
| Face brick | 12" | 2.13 |
| Cast in place concrete | 8" | 0.64 |
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Building Materials: |
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| Asphalt shingles | - | 0.44 |
| Bevel lap siding | 1/2" x 8" | 0.81 |
| Bevel lap siding | 3/4" x 10" | 1.05 |
| Carpet & pad | - | 2.08 |
| Fiber board sheathing | 3/4" | 2.10 |
| Glass, insulated | - | 1.65 |
| Glass, single pane | - | 0.94 |
| Gypsum board | 3/8" | 0.32 |
| Gypsum board | 1/2" | 0.45 |
| Gypsum board | 5/8" | 0.56 |
| Hardwood | 1/8" | 0.09 |
| Hardwood | 3/16" | 0.14 |
| Linoleum | - | 0.08 |
| Paneling / plywood base | 1/4" | 0.31 |
| Plywood | 1/2" | 0.63 |
| Plywood | 5/8" | 0.79 |
| Slate | 1" | 0.05 |
| Softwood | 1" | 1.25 |
| Vapor barrier | - | 0.00 |
| Vertical tongue & groove board | 3/4" | 1.00 |
| Vinyl flooring | 1" | 0.05 |
| Wood core door | 1" | 1.96 |
| Wood sheathing | 3/4" | 1.00 |
| Wood shingles | - | 0.87 |
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Insulation: |
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| Cellulose (milled paper & wood pulp) | 1" | 3.4 |
| Mineral fiber (rock, slag, glass) | 1" | 3.25 - 3.70 |
| Mineral fiber (rock, slag, glass) | 3-1/2" | 11.00 - 13.32 |
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