How you insulate your attic depends on whether you want a “cold” or “warm” roof space. A cold roof requires insulation at joist level to stop heat escaping through the unused roof space. A warm roof is insulated between and under the rafters of the roof itself. The recommended depth for insulation has been increased recently, so you may have to increase the depths of the joists or rafters if you want to create usable platforms of storage space.
- This simple concept has brought us innovations such as the chimney and the hot air balloon. Yet it’s also one of the sources of our biggest energy costs every year, as heat from your home or business is depleted throughout your attic.
- This heat loss is part of why 50-70 percent of your home’s energy costs are tied up in your HVAC system.
- Don’t think that it’s limited to cold parts of the country, however. Heat gain in areas where air conditioning is a major part of your utility costs is just as big of an issue.
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