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R-Values Chart
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Insulation Location
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R-Value
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Comments
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| Wood frame wall cavity |
11 |
Blow insulation into any uninsulated exterior wall cavity |
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| Floor |
25 |
Over unheated, uninsulated space |
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| Crawl space wall |
19 |
Crawl space walls are only insulated if the crawl space is unvented and the floor above the crawl space is uninsulated. |
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| Basement wall interior |
11 |
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| Insulating sheathing on empty wall |
7 |
Recommendation assumes that the exterior siding was removed for other purpose, i.e., does not include any consideration of the cost of removing and replacing the exterior siding |
| Add insulating sheathing to R11 wall |
5 |
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| Heating System: Natural Gas
Cooling System: Electric Air Conditioning
Location:Pittsburgh, PA
Source: U.S. Department of Energy |
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"The recommendations are based on an analysis of cost effectiveness, using average local energy prices, regional average insulation costs, equipment efficiencies, climate factors, and energy savings for both the heating and cooling seasons." |
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