Fiberglass Batts In Attic

Blown in insulation thickness can vary in an attic space.

Fiberglass batts in attic. Adjoining batts should be butted snugly together but not tight enough to compress them. We re proud to say our products can be found in some of the tallest and safest buildings around the globe like salesforce tower. 1 the interior walls on the backsides of these attic walls are warmer to the touch than other walls in the room. If fiberglass batts become compressed losing some of their air pockets then this insulation may be more affected by air flow than cellulose which performs well regardless of density.

The r factor of blown in fiberglass is usually 2 3 to 2 8 per inch of material. Batts fiberous rolls or sheets of owens corning fiberglass insulation installed between the ceiling joists in the attic are one of the most effective energy upgrades the average. 71 of all the insulation used by the 1 600 builders surveyed is fiberglass 52 of it in the form of batts and 19 blown. Never lay heavier batts such as cotton over lighter ones like fiberglass.

When used in an attic space however both types of insulation are ineffective at air flow across the attic floor such as a strong gust of wind. The photo above shows an attic insulated with blown cellulose. This will lead to non uniform r values. Place a new layer of unfaced batts perpendicular to the old layer to cover any gaps in the lower layer.

When it comes to insulating your attic there are really only two types of insulation worth considering fiberglass batts or blown in insulation. I don t know about that but it s a common insulation material that works much better in the blown form than in batts. Case study salesforce tower. With a minimum of 70 recycled content the installed thermafiber products contributed to valuable leed credits helping the building earn a leed platinum certification.

Blown in insulation consists of bags of fiberglass or cellulose that are chopped up and blown in to the attic or wall from a machine. According to the article fiberglass has held fairly steady at that level for the past few years. As you can see fiberglass is the dominant insulation material. Owens corning r 30 ecotouch pink unfaced fiberglass insulation batt 16 in.

These walls are of 2 4 construction with vertical unfaced fiberglass batts held in place with a thin mesh. You ll compress the lower layer and reduce its effectiveness. There are many voids in the fiberglass batts and i can see the backsides of many of the outlet boxes.