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. These insulation levels will keep heated air from migrating out in winter. If you have an older home chances are the attic insulation is the same insulation that was installed when the house was built. Foam insulation can settle after a year and may need to be replaced to keep it fluffy and insulating properly. Insulation should also be replaced in some cases sooner than 15 years if it is no longer doing its job properly.
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. How often do i need to replace insulation in my attic. Insulation begins to degrade in quality and effectiveness at around the 15 year mark. But if you ve got an unfinished attic giving it proper insulation is one of the simplest ways to keep a lid on your heating bill this season.
The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. R value is a measure of insulation s ability to resist heat flow. Insulation levels are specified by r value. Standard insulation starts to degrade and start peeling from walls after about 15 years.
The answer depends on where you live. In older homes there s a chance your attic insulation has never been replaced and could be badly degraded. 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. But many homeowners i talk with don t know how much is enough.
You ll know it needs to be replaced if there are insulation leaks or if it is peeling from the walls.