Fiberglass Batts In Attic

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.

Fiberglass batts in attic.

We re proud to say our products can be found in some of the tallest and safest buildings around the globe like salesforce tower. There are many voids in the fiberglass batts and i can see the backsides of many of the outlet boxes. 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. 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 photo above shows an attic insulated with blown cellulose. Blown in insulation thickness can vary in an attic space. Because of this this method will normally require you to hire a professional. 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. 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. Place a new layer of unfaced batts perpendicular to the old layer to cover any gaps in the lower layer. Never lay heavier batts such as cotton over lighter ones like fiberglass.

When it comes to insulating your attic there are really only two types of insulation worth considering fiberglass batts or blown in insulation. 1 the interior walls on the backsides of these attic walls are warmer to the touch than other walls in the room. Adjoining batts should be butted snugly together but not tight enough to compress them. Owens corning r 30 ecotouch pink unfaced fiberglass insulation batt 16 in.

This will lead to non uniform r values. Fiberglass comes from what i ve heard one major fiberglass insulation manufacturer call a rapidly renewable resource sand. I don t know about that but it s a common insulation material that works much better in the blown form than in batts. Once installed and expanded to the uniform manufactured thickness batts offer a known r factor.

The r factor of blown in fiberglass is usually 2 3 to 2 8 per inch of material. Case study salesforce tower. According to the article fiberglass has held fairly steady at that level for the past few years.