Attic insulation performs a vital role in home energy performance. In reality, most building scientists agree that the attic should be the first “target” area for insulation and air-sealing upgrades. Most properties are built with code-required minimum levels of attic insulation which are far under current recommendations established by the U.S. Dept. of Energy.
Owners considering an attic insulation improve have a number of various insulation materials to consider. Each attic insulating option has distinct advantages and limitations. Understanding these pros and cons can help you choose one of the best insulation upgrade on your attic.
Fiberglass batt insulation insulation in concord is popular because it is affordable and universally available. No matter age, many houses have attics insulated with fiberglass batts. The batts are typically put in between attic floor joists, and unfaced batts are extra widespread than confronted batts in attic installations.
PROS: Extra affordable than different kinds of attic insulation. Best kind of insulation for DIYers to install. Not like blown insulation, batts might be lifted up and moved to offer access to the ceiling beneath, can lights and ceiling-mounted vent fans. Current batt insulation can usually be left in place when blown insulation is added to extend total R-worth in the attic.
CONS: Troublesome to put in correctly round obstructions. Voids where insulation is missing contribute to significant energy loss. Multiple layers of batt insulation are required to attain really helpful R-values in most elements of the nation; this makes it not possible to use the attic for storage until particular platforms are built prior to insulation installation. Fiberglass insulation cannot stop air movement.
Two major varieties of blown (or blow-in) insulation are generally used: cellulose and loose-fill fiberglass. Both sorts are designed to be put in utilizing particular blowing equipment.
PROS: Set up will be accomplished quickly and affordably. Blown insulation typically ends in more complete coverage than is feasible with fiberglass batts.
CONS: A thick layer of insulation (at the least sixteen in. for northern parts of the U.S.) is required, and this makes it inconceivable to make use of the attic space for storage except special platforms are constructed prior to installing the insulation. Cellulose and unfastened-fill fiberglass insulation cannot stop air movement.
Skilled spray foam insulation contractors typically insulate an attic by applying a thick layer of spray foam between the rafters. Two types of foam are used: open-cell and closed-cell. Opinions fluctuate as to which kind is finest in an attic set up, but closed-cell spray foam is used extra frequently.
PROS: Closed-cell spray foam offers the very best R-worth per in. (about R-6) of any attic insulation. It additionally creates an air and moisture barrier, so it eliminates the necessity for separate air-sealing work. Insulating beneath the roof deck as a substitute of on the attic floor frees up attic area for storage and different purposes. This strategy also improves the efficiency of HVAC components (like air handlers and ductwork) located in the attic.
CONS: Most costly attic insulation. A thick layer of froth applied to the underside of the roof sheathing can lure moisture and cause sheathing to rot.
Rigid foam hasn’t been used as extensively for attic insulation until a most recent development. In one unique system, a proprietary rigid foam panel is fastened to the underside of attic rafters, forming an air and thermal barrier.
PROS: Gives all the advantages of spray foam, with the additional good thing about sustaining attic ventilation. The potential for roof sheathing moisture damage is eliminated. The inflexible foam is confronted with a radiant barrier that reflects heat for extra energy savings -one other benefit over spray foam.
CONS: The system is available in limited areas, so it isn’t as broadly available as spray foam. Installation cost is bigger than fiberglass batts and blown insulation, however aggressive with spray foam.