Mueller Snap Lock (MSL) - Manual (Page 14)

14
INSULATION
Insulation Installation:
When insulation is installed, the outside edge of the insulation should be tight against the outside edge of the
rake angle. A starter role of 4’ or 5’ is normally used so that approximately 12” of the leading edge will still be
exposed when a new run of insulation is installed. This allows easy access to the vapor barrier lapping of the
insulation. Four inches of the downhill end of the fiberglass blanket should be removed and the four inches of
vapor barrier folded back over the remaining blanket. This starting end of the insulation should be placed on
the inside, lower step of the edge plate and can be held in place with double-sided tape along the rake angle
and the eave plate.
NOTE: Blanket insulation omitted from the following pages for clarity.
Floating Rake Angle
Starter Piec
e
Roof Insulaltion
(starter piece)
Insulaltion Vapor
Barrier Facing
Purlin
Cut Fiberglass from facing and
fold facing back over Fiberglass
Eave Strut
End of Insulation
(set behind rise
of edge plate)