Fiberglass Batts In Attic

Once installed and expanded to the uniform manufactured thickness batts offer a known r factor.

Fiberglass batts in attic.

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. The photo above shows an attic insulated with blown cellulose. Because of this this method will normally require you to hire a professional.

According to the article fiberglass has held fairly steady at that level for the past few years. When it comes to insulating your attic there are really only two types of insulation worth considering fiberglass batts or blown in insulation. Case study salesforce tower. 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.

Fiberglass comes from what i ve heard one major fiberglass insulation manufacturer call a rapidly renewable resource sand. Adjoining batts should be butted snugly together but not tight enough to compress them. I don t know about that but it s a common insulation material that works much better in the blown form than in batts. Owens corning r 30 ecotouch pink unfaced fiberglass insulation batt 16 in.

Place a new layer of unfaced batts perpendicular to the old layer to cover any gaps in the lower layer. 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. You ll compress the lower layer and reduce its effectiveness. These walls are of 2 4 construction with vertical unfaced fiberglass batts held in place with a thin mesh.

This will lead to non uniform r values. Blown in insulation thickness can vary in an attic space. 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. Never lay heavier batts such as cotton over lighter ones like fiberglass.

There are many voids in the fiberglass batts and i can see the backsides of many of the outlet boxes. 1 the interior walls on the backsides of these attic walls are warmer to the touch than other walls in the room. 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.