Roof Installation
Typically, metal
building purlins
are spaced 5’
apart. 5’ fiberglass
blankets
are standard. Anything other than 5’
wide can be factory pre- cut to fit the
existing purlin spacing prior to lamination.
The factory pre-cut roll length is
then determined by the spacing of the
bays or the distance between the rigid
frames. The purlin depth varies with
8” being the most common. All rolls
are cut, then labeled to help insure that
the blankets are placed in the proper
space.
Banding System
The most common method of
adding insulation to a metal building
roof is with a banding system. Steel
bands, typically 1” wide (depending
on the manufacturer) are screwed to the under side of the metal purlin 30” apart creating a grid system in the roof.
The factory pre-cut rolls are then fed
through, above the steel bands and secured. The steel bands act as a support to the fiberglass blankets. |
