Attic
There are several ways to insulate an attic. Batt insulation, blanket insulation, rigid foam insulation and spray-in-place foam insulation are the four most common methods of insulating. When buying insulation, research the R-value of the product. R-values are based on a number scale, with the lowest number indicating poor insulation and the higher numbers indicating better insulation. Homeowners in locations with extreme weather, such as cold and snow or extreme heat, should buy and install an insulation product with a high R-value to reduce heating and cooling costs.
Fiberglass batt insulation
Fiberglass batt insulation is available in a variety of sizes and thicknesses, and is composed of fiberglass threads glued to a special paper backing. Most insulation is 16 inches wide by 48 inches long, and the thickness depends on your specific needs. Install fiberglass batts by placing the insulation between the rafters or joist of the building. Next, unfold the paper tabs, which are located along the outer edge, so that they lie over the rafters. Use a hammer tacker or staple gun to attach the tabs to the rafters.
Fiberglass blanket insulation
You can insulate your attic using fiberglass blankets. The blankets are constructed of fiberglass threads woven together to form an insulation barrier. These blankets, which are purchased in large rolls, do not feature paper backing. Unfurl the rolls to the specific length needed between the rafter and/or the joist, and cut them using a utility knife. The fiberglass blankets are designed to hang in place and don't need to be stapled or tacked into place.
Rigid panels
You can also use rigid panels, which are available in sheets, to insulate an attic. Rigid panels, which most commonly come in 4-by-8-foot sheets, are made of a hard foam you can cut by scribing with a utility knife and then breaking by hand. You can use a handsaw to cut thicker panels. Rigid panels are usually installed using screws with plastic washers or glue.
Spray-in-place foam and loose fill insulation
To install spray-in-place foam or loose fill insulation, a pump is used to spray a specific spot. You must hire a commercial company if you decide to use the spray-in-place foam application, because specific machinery is required to pump the foam into place. Once the liquid mixture is released, it will harden and stick in place. When using loose fill insulation, place plastic film over the rafters or joist and then spray the product between the rafters or joist. The plastic film will hold the loose fill insulation into place and then it can be covered by gypsum board.
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