Adding Bats Of Insulation To Attic

The r factor of blown in fiberglass is usually 2 3 to 2 8 per inch of material.

Adding bats of insulation to attic.

Insulation should be rolled out perpendicular to the joists and unfaced rolls should be used. Loose fill or batt the common term for blanket insulation. Lay the batts perpendicular to the joists so. Measure how much insulation you already have.

How much does attic insulation cost. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. The problem with batts however is that they don t work well because they don t fill the space well. The negative thing about blown in insulation is that it makes the attic absolutely impassable when you re done and you need a lot more thickness of it because it has more air inside of it than you would if you used fiberglass bats.

The pros charge 1 500 to 2 000 to do a 1 200 sq ft. For the best performance an insulation material needs to fill the whole space with no gaps voids compression or incompletely filled areas. This will lead to non uniform r values. Make sure you use an unfaced batt one without a paper or foil layer so the insulation does not trap moisture in the ceiling.

Blanket insulation is available as batts or rolls and is the easiest diy insulation material. Because blown in insulation which is fiberglass generally can go on top of the existing insulation. How to install attic insulation over existing insulation wear a long sleeve shirt gloves eye protection and a dust mask. Cotton batts though are cool because they re made of recycled blue jeans.

To make insulating an attic easier grab a helper and set aside two days. Blowing attic insulation isn t hard but it s dusty sweaty work. Batt or rolled insulation or blown loose fill insulation fiberglass or cellulose can be installed on top of old insulation. It s available in fiberglass mineral wool plastic fibers and natural fibers.

Any existing batt or roll insulation in the attic should have the facing against the attic drywall floor or no facing at all. Once installed and expanded to the uniform manufactured thickness batts offer a known r factor. Check the depth using a tape measure. Put on goggles and gloves to protect yourself while handling.

Both can be added to uninsulated attics or layered over existing material. You can do it yourself for about 500. For diy attic insulation you ve got two choices. One for attic prep and the second to actually blow the insulation.

This type of insulation. Blown in insulation thickness can vary in an attic space.