For the best performance an insulation material needs to fill the whole space with no gaps voids compression or incompletely filled areas.
Adding bats of insulation to attic.
Lay the batts perpendicular to the joists so.
For diy attic insulation you ve got two choices.
You can do it yourself for about 500.
Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all.
The pros charge 1 500 to 2 000 to do a 1 200 sq ft.
Blanket insulation is available as batts or rolls and is the easiest diy insulation material.
How do i add insulation to existing attic insulation.
Measure how much insulation you already have.
If you need to add insulation in your attic save big by blowing in cellulose insulation yourself.
One for attic prep and the second to actually blow the insulation.
Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used.
How much does attic insulation cost.
Because blown in insulation which is fiberglass generally can go on top of the existing insulation.
Check the depth using a tape measure.
This type of insulation.
Blowing attic insulation isn t hard but it s dusty sweaty work.
Once you ve decided which type is best for you examine the material options and prices to home in on the right product.
How to install attic insulation over existing insulation wear a long sleeve shirt gloves eye protection and a dust mask.
It s available in fiberglass mineral wool plastic fibers and natural fibers.
To make insulating an attic easier grab a helper and set aside two days.
Install fiberglass batts over existing batt insulation.
Both can be added to uninsulated attics or layered over existing material.
Once installed and expanded to the uniform manufactured thickness batts offer a known r factor.
Loose fill or batt the common term for blanket insulation.
Put on goggles and gloves to protect yourself while handling.
Cotton batts though are cool because they re made of recycled blue jeans.
Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation.
The r factor of blown in fiberglass is usually 2 3 to 2 8 per inch of material.
Blown in insulation thickness can vary in an attic space.
This will lead to non uniform r values.