How Often To Add Insulation To Attic

The higher the r value the better the thermal performance of the insulation.

How often to add insulation to attic.

But many homeowners i talk with don t know how much is enough. Typically houses in warm weather states should have an r 38 insulation in the attic whereas houses in cold climates should have r 49. While some insulation is built to last years there are times when you need to replace your insulation or add on more insulation to it. If you ve never had your insulation checked out before it s time to get it done.

These insulation levels will keep heated air from migrating out in winter. Insulation levels are specified by r value. If you have an older home chances are the attic insulation is the same insulation that was installed when the house was built. The answer depends on where you live.

How often do i need to replace insulation in my attic. It s a diy project you can tackle in a weekend and the savings you ll get add up every year says toh general contractor tom silva. How often should attic insulation be replaced. Insulation should also be replaced in some cases sooner than 15 years if it is no longer doing its job properly.

R value is a measure of insulation s ability to resist heat flow. In older homes there s a chance your attic insulation has never been replaced and could be badly degraded. The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Insulation begins to degrade in quality and effectiveness at around the 15 year mark.

Foam insulation can settle after a year and may need to be replaced to keep it fluffy and insulating properly.