Fiberglass Batts In Attic

You ll compress the lower layer and reduce its effectiveness.

Fiberglass batts in attic.

Once installed and expanded to the uniform manufactured thickness batts offer a known r factor. Place a new layer of unfaced batts perpendicular to the old layer to cover any gaps in the lower layer. As you can see fiberglass is the dominant insulation material. These walls are of 2 4 construction with vertical unfaced fiberglass batts held in place with a thin mesh.

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. 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. Fiberglass comes from what i ve heard one major fiberglass insulation manufacturer call a rapidly renewable resource sand.

The photo above shows an attic insulated with blown cellulose. Never lay heavier batts such as cotton over lighter ones like fiberglass. 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.

This will lead to non uniform r values. There are many voids in the fiberglass batts and i can see the backsides of many of the outlet boxes. 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. Because of this this method will normally require you to hire a professional.

Blown in insulation thickness can vary in an attic space. We re proud to say our products can be found in some of the tallest and safest buildings around the globe like salesforce tower. Case study salesforce tower. 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.

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. With a minimum of 70 recycled content the installed thermafiber products contributed to valuable leed credits helping the building earn a leed platinum certification. The r factor of blown in fiberglass is usually 2 3 to 2 8 per inch of material.