The reason for this is simply because the glass fibers work exceptionally well with insulating temperature.
Attic is full of fiberglass.
Fiberglass has been the preferred method for attic insulation for a very long time now.
See my article for more details.
Its r value ranges from as low as 2 2 to as high as 4 3 in the case of specially manufactured high density fiberglass.
If the access into the attic is in a closet or another part of the house it must be treated as an important part of the thermal envelope.
Then a few decades later we come by and stuff those cavities full of fiberglass which acts like a sponge and we wonder why our old house is having so many problems.
Fiberglass attic insulation one of the most popular home improvement projects for both diyers and professional contractors.
Inspecting your attic insulation.
Adding insulation to the attic is an easy and proven way to increase home comfort and decrease energy costs.
Yes there was a study from the early 1990s that showed blown fiberglass in attics could lose 50 of its r value when the attic temperature dropped.
First things first you need to go up into your attic inspect the condition of the insulation and calculate the current level of insulation.
It also can help increase the value of your home.
It s certainly not the highest quality option but it s easily the most popular.
To gain access to an attic often a piece of sheetrock needs to be moved away from the access point.
Fiberglass is also water and fire resistant which means it isn t a fire risk material and it can t absorb or hold water.
When i think of insulation what comes to mind is fiberglass blanket insulation.
It s available in fiberglass mineral wool plastic fibers and natural fibers.
The problem was the way the insulation was made and the fiberglass industry fixed the problem.
Compression in fiberglass insulation is a bad thing.
Your attic should have a certain amount of insulation in it and the recommended level of insulation for your attic is dependent on where you live.
Fiberglass is like the mcdonald s big mac of insulation material.
This type of insulation is ideal for attics with standard spaced beams and joists and very few obstructions.
It is important that a piece of fiberglass be physically attached to the back of this sheetrock with glue.