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Insulating Your Roof

Brrr! It's getting cold out there. And yikes! Your heating bills are starting to climb sky high. Fortunately, there are ways to stay warm without spending a small fortune or packing up and moving to a sunnier clime. Home insulation is the key to lower winter energy costs, keeping heated air in the house and cold air out. (It helps your house stay more comfortable in summer, as well.) And one of the major areas where you want to limit heat transfer is your roof. Here's how to insulate the roof so your family stays warm and cozy while your energy bills stay under control.


Maintenance


The first step is simple and inexpensive ... just the way we like it: Work with what you have. Keep your roof in good shape via regular inspection and prompt repair. Fix loose, curling, or cracked roofing shingles and take care of any rotted wood or gaps in the roof fascia, soffit, and flashing immediately. This kind of preventive medicine will safeguard the inside of your home against icy drafts as well as water leaks.


"Cold" vs "Warm" Roof Space


Next, you'll need to decide between a "cold" and a "warm" roof space. These terms refer to exactly where the roofing insulation will be installed (at joist level or adjacent to the rafters respectively), not to the resulting temperature in your living space. In fact, a cold roof space is advisable if you live in a part of the country that has severe winters. It is much less likely than a hot roof to cause fallen snow to melt and refreeze, forming hazardous ice dams. It's also simpler and less expensive to retrofit with insulation; however, a warm roof does allow a higher level of heat retention.


Blanket Insulation


Blanket insulation is one of the most common methods of insulating a cold roof space, and is traditionally manufactured from fiberglass. Your roofing contractor will install a vapor barrier as needed. He will then carefully roll out the blanket insulation on top of the barrier, ensuring that it is flush with the roof joists and eliminating any gaps between lengths of insulation. Have your contractor cut an opening in the blanket for the electrical components to prevent their overheating.


Recycled or sheep's wool insulation offers a more environmentally friendly alternative to the conventional fiberglass. The former is usually made out of post-consumer cellulose recycled from old newspapers or out of cotton mill scraps or recycled fabric (which is where it gets its nickname, "blue jean insulation"), while the latter is made from natural sheep's wool.



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