How To Insulate The Attic Floor

The solid base.

How to insulate the attic floor.

How to lay attic flooring on top of fiberglass insulation. In unfinished attic spaces insulate between and over the floor joists to seal off living spaces below. If the air distribution is in the attic space then consider insulating the rafters to move the distribution into the conditioned space. A finished attic should be insulated much like the rest of the house with insulation in the walls and ceiling.

Additionally purchase some loose fill insulation to insulate corners and angles where the batting won t fit. Start with the attic floor. To insulate an attic get some batting made out of mineral wool fiberglass or recycled foam. Attic flooring consists of materials as basic as sheets of plywood as well as more elaborate interlocking floor systems.

The moisture will condense on the wood and insulation reducing the insulation r value and encouraging the growth of mold and mildew. Because the simplest and cheapest way to insulate an attic is to add material to the floor. To build a catwalk you would usually elevate a section of the framing perhaps with 2x6s installed at 90 degrees to the joists and you would install osb or plywood on top of the elevated framing. If you have to insulate around electrical boxes or cables then support from an electrician might be needed as part of the process too.

For example loftzone storefloor is lightweight and very easy to install. For example heating and air can come from clothes driers. Loftzone raises the height of the lower chord of the attic truss. If you insulate the attic floor it is also important to have a vapor barrier in place to prevent warm moist air from rising into the chilled attic from the living space below.

That means insulating the attic floor only not the walls and having vents in the roof. How to insulate a finished attic. Take up the floor allowing you to see the joists. If you need regular access to your attic it makes sense to build a catwalk before you insulate the floor of your attic.

You ll want to buy enough batting to lay at least 10 to 14 inches over the entire space. With a finished attic insulation must help keep the attic areas comfortable. You should have a vapor barrier between the insulation and the ceiling of your garage. Stop using your attic for storage.

Take the insulation up to your attic so that you are above the garage ceiling. This allows the full depth of attic insulation to work as intended.