Attic Insulation Over Old Insulation

The higher the r value the better the thermal performance of the insulation.

Attic insulation over old insulation.

One of the most common materials containing asbestos fibers is attic and wall insulation. Apply a house wrap vapor barrier to exterior walls. Faced insulation should not be placed on top of existing insulation in the attic. In older homes specifically asbestos may be found in many different materials from pipe insulation to flooring adhesive to roof shingles.

Although insulation professionals will handle the installation for you here are some things to keep in mind about removing old insulation and installing new insulation over old insulation according to energy star. To install fiberglass batts over existing insulation lay the batts perpendicular to the joists so they do not compress the insulation below. Laying foil over on top of insulation on the attic floor. Both can be added to uninsulated attics or layered over existing material.

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. This is probably the easiest method to install radiant barrier atticfoil is to lay the foil out over the existing insulation on the attic floor. Insulation levels are specified by r value. For diy attic insulation you ve got two choices.

Replace old windows with energy efficient units. These r values are a sum meaning this should be the total r value once you add up the entire depth of insulation. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. But just because your insulation is old doesn t mean it is dangerous.

Attach 1 inch foam board insulation. Add the right kind of insulation. Caulk window trim and use weatherstripping to reduce air leaks. Install siding over the insulation.

One way to insulate walls of an old house is to focus on the home s exterior. This method can be used in any climate though it historically has been most popular in colder climates. Whether you live in a warm weather state as i do or in a cooler northern climate it s hard to stay comfortable and keep your energy bills in check if you don t have adequate insulation in the attic. When the time comes to sell your home a well insulated attic is a plus.

The recommended level for most attics is to insulate to r 38 or about 10 to 14 inches depending on insulation type. R value is a measure of insulation s ability to resist heat flow.