Wall Insulation

Written by Patricia Skinner
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Wall insulation is one of the most effective ways of all to reduce energy costs in your home. If you also install roof insulation you will be doing all you can to reduce heating costs in the winter and air conditioning costs in the summer. In addition, your home will be more comfortable year round.

Your choices for wall insulation include fiberglass, or rigid foam board. There is also cellulose and polyurethane foam. Polyurethane foam is superior to all other methods for R value, which in layman's terms means it gives you more insulation power. Cellulose has a big disadvantage in that it tends to absorb moisture and so could pose a mold and damp hazard. Both cellulose and fiberglass will eventually settle inside the wall.

Polyurethane Doesn't Settle

This is not so with polyurethane foam. Once it cures it forms a rigid layer which will not settle. However, if it is exposed to sunlight it will yellow and deteriorate. This should not be a problem if it is being used inside your roof (under tiles) or inside cavity walls.

Some people mention that it is difficult to tell how you're doing as far as covering the entire surface of the inner wall is concerned when you apply foam. This was a problem. Now, however, it has been discovered that you can use infrared to detect thin or uncovered areas, leading to a much more efficient application of foam insulation.

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