How Attic Insulation Works

Foam plastic Insulation of a new home on a new roof

Learn More About Attic Insulation

Your property will need to have materials in place in your attic in order to regulate heat flowing in and out of the property. Essentially, attic insulation works by preventing water vapor from seeping in and eroding walls. It will slow the buildup of heat in your attic which can cause moisture problems and cause the plywood of your deck to soften. Heat buildup can also cause shingles on your roof to swell and crack. In order to prevent gradual damages of heat and moisture onto your home, attic insulation along with ventilation is the key to keeping conditions good. Make sure to get into contact with a professional roofer about attic insulation. Until then, here is some general background information surrounding it that may prove useful to you.

Is it better to insulate attic ceiling or floor?

With attic insulation, insulating the floor is the better option if you are choosing which to do instead. It’s standard practice to insulate the floor of an unfinished attic space with the exception of the rule being when someone chooses to convert the attic space into something liveable or useable. 

How many inches of insulation should be in my attic?

The recommended level for most attics with attic insulation is to insulate to R-38 or about 10-14  inches. This amount will also depend on the type of insulation used. As such, the higher the R-value the better the thermal performance of attic insulation. Get in touch with a professional to determine which will be best according to your property specifications.

Can you put too much insulation in attic?

There can come a point of too much attic insulation. With over-insulation that is too tightly sealed moisture can become trapped inside. Without the right amount of ventilation, a home can buildup too much moisture. As warm air rises you’ll see this especially in the attic which can not only lower indoor air quality but cause mold issues as well.

What happens if attic is not vented?

Along with attic insulation, if your attic is not vented properly heat will migrate there and cause moisture issues. Condensation can build up with excessive heat which can cause major damages to the roof and roofing materials. A combination of attic insulation and ventilation may be necessary to implement.

Can you put new insulation over old?

You may be able to put new attic insulation over old materials as long as the material is not wet. Make sure to remove wet insulation as with it you may see mildew, mold, or even ceiling rot develop with the ceiling, attic floor, or roof rafters. 

How do I know if my attic needs more insulation?

If you are able to see your floor joists then you will need more attic insulation. Floor joists are about eight inches high and are spread a few feet apart across the attic floor. With either batt insulation (fluffy blanket-like material) or loose fill (shredded material), they should completely cover these areas.

a roll of insulating glass wool on an attic floor

What kind of insulation is used in attics?

  • Batt insulation (fluffy blanket-like material)
  • Loose-fill (shredded material) 
  • Fiberglass
  • Mineral wool (rock or slag) 
  • Cellulose
  • Cotton

What is the best type of insulation for an attic?

According to the North American Insulation Manufacturers Association, the best type of attic insulation will be fiberglass or mineral wool.

Which is better attic insulation blown or rolled?

With rolled fiberglass attic insulation there is an R-value score of 3.7 which makes it slightly more effective at blocking in and out heat in comparison to blown fiberglass Blown-in fiberglass attic insulation can be good for filling in tight voids around pipes, wiring, or any area where framing is awkward.

Is insulating the attic worth it?

Attic insulation is very worthwhile as in the long-term it can greatly lower heating and cooling bills. It will prevent the gradual damages made from heat build-up and protect the integrity of your roofing materials as well as roof rafters. With heat build-up, you’ll see many repairs or even costly replacements down the line so it’s best to avoid such situations from occurring with the addition of attic insulation.

Contact Your Local Roofing Experts About Attic Insulation Today

Get in touch with a certified roofing company in order to see what kind of attic insulation material is right for your property. Depending on your property specifications and other details there may be a better option available for you. With a professional roofer, the right R-value can be reached with either your floor or ceiling. You’ll be able to extend the life of your roof as well as lower heating and cooling bills thanks to the regulation of heat and moisture that attic insulation will provide. Make sure to implement the right kind of attic insulation for your home and have your property in optimal conditions today.

To get assistance with attic insulation in Macon & Augusta, GA call 478-785-2285 with Crosby Roofing!