Fiberglass Insulation Single Layer Installation System
- Place the fiberglass insulation roll over the top of the roof purlins and or wall girts. Obviously, this is done before external steel sheeting has been installed.
- Therefore, the insulation rolls are basically sandwiched between the interior steel members and the exterior sheeting.
- The vapor barrier (white or black finish) is faced towards the inside of the building, giving the building a clean finished look. We re-enforce this facing (VRR+) so that our customers have the strongest backing. With a single-layer application, you can achieve R-Values up to R-25. Some recommend only going R-19 (6″) with a single-layer application on a metal building.
- The 2- 3” tabs or 1-6″ are to be rolled over and stapled. We recommend you order double-sided tape for the insulation’s easy adherence to the building, as well as a small supply of patch tape for possible minor tears.
Fiberglass Insulation Double Layer Installation System
One of the advantages of fiberglass insulation is how simple it is to add an additional layer; therefore, increasing your R-value. The recommended highest R-value with a single layer of insulation is R-25 which is 8”. Your purlin depth determines the thickness of your bottom layer.
- Faced fiberglass (our standard is to include a strong reinforced faced backing – VRR+) rolls are installed between the purlins and/or girts, filling the cavity. You want to fill the cavity because it creates the highest R-values efficiency.
- The most common material used to secure the insulation is banding. The banding is screwed to the underside of the purlins. Then a 2nd layer of unfaced insulation is then placed over the top of purlins or girts. Needless to say, this creates a higher R-Value.
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