Installing Fiberglass Insulation In Attic

The most common materials are fiberglass cellulose and rock wool.

Installing fiberglass insulation in attic.

Fiberglass is probably the most common material. Multiply the depth in inches by 3 14 to determine the r value of the existing insulation. It s budget friendly and newer products don t irritate the skin and lungs. If installing shredded insulation fill the attic space at least 15 inches high with insulation.

Loose fill or batt the common term for blanket insulation. We ll walk you through the steps to help you find the right type of fiberglass attic insulation and the right amount. The pros often use spray foam insulation or blow shredded insulation. Fiberglass insulation is manufactured to slow airflow through the material.

For more information see install blown in attic insulation and our. First you ll need to determine your r value. Fiberglass can release tiny fibers which can be harmful if breathed into the lungs and which may irritate the skin. Lay the batts across the ceiling joists covering the existing insulation.

Measure the depth of the existing insulation between the ceiling joists in the attic. When installing fiberglass insulation in your home be sure to put the paper or foil vapor barrier facing toward the heated and cooled living area of the home down in attics up under floors in on walls to prevent condensation from occurring. The facing has a tab called a flange running along each side edge of the insulation. Expert advice on how to install fiberglass insulation including methods for insulating walls floors ceilings attics and more.

When installing fiberglass insulation observe all safety precautions. There are many different ways to install insulation. In this video this old house general contractor tom silva and host kevin o connor explain how to insulate an attic. While wearing dust mask and gloves carry r 38 batts of unfaced fiberglass insulation into the attic.

If installing fiberglass mats start by laying the mats at the furthest point from the attic access. Once you ve decided which type is best for you examine the material options and prices to home in on the right product. Installing fiberglass attic insulation first time adding insulation to an attic. For diy attic insulation you ve got two choices.

All kraft faced insulation is easy to cut with a sharp utility knife or insulation knife. When installing the insulation in wood frame structures you fold out the flange and staple it to the side or front edge of the framing to secure the insulation. Includes cutting and fastening insulation and insulating around obstacles. If it s a new building simply reference the energy code map.