Attic Insulation Over Do It

It can be effectively blown over existing insulation and.

Attic insulation over do it.

Also when laying down additional insulation work from the perimeter toward the attic opening. Measure the depth of your current insulation. For diy attic insulation you ve got two choices. The pros charge 1 500 to 2 000 to do a 1 200 sq ft.

Believe it or not there are situations in a home when you should remove the old attic insulation before adding more over the existing and in this short video. If you do have insulation find out the type and compare it to industry standards. Determine if and where you already have insulation. Do not press into the insulation.

Loose fill or batt the common term for blanket insulation. See install batt and roll insulation for details. A bag of cellulose runs about 11 50 and will cover 36 7 square feet at a. When adding additional insulation you do not have to use the same type of insulation that currently exists in your.

Cellulose insulation has an average thermal value of r 3 7 so you d need just over five inches to equal an r 19 batt. R 38 is the industry standard and the minimum thickness for r 38 is 12 inches. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Calculate additional insulation needed.

The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. Lay the radiant barrier foil loosely over the attic insulation. There are two main types of insulation. Both can be added to uninsulated attics or layered over existing material.

Batt and roll insulation works well between joist and stud spaces or if you have a wide open space or a crawlspace. Blown in insulation overview. Your insulation will have some peaks and valleys and this is desirable. Never lay insulation over recessed light fixtures or soffit vents.

The higher the r value the better the thermal performance of the insulation. Loose fill blown in insulation is best for tight spaces or if your attic already has a layer of insulation. If you need to add insulation in your attic save big by blowing in cellulose insulation yourself. Foil radiant barrier does not cause moisture.

If you are using loose fill insulation use sheet metal or wire. Ideally you want about 10 20 surface contact with the foil. Add the right kind of insulation. Keep all insulation at least 3 inches away from recessed can lights unless they are rated ic insulated ceiling.

Loose fill insulation is great for installing in attics with very little headroom and multiple obstructions such as vents and cross beams.