Velux GGU INTEGRA Manuel d'utilisateur Page 128

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Product information
128 VELUX
8
BDX
The frame insulation collar consists of
shaped polyethylene insulation in a stable
steel frame. The collar is positioned in the
hole in the roof before the VELUX window
is installed. This ensures an eective insula-
tion around the frame.
BFX
Underfelt collar of diusion open material
with pleated sides that are shaped around
the battens to ensure a rain and snow-tight
connection. Can also be supplied separately.
VELUX installation products ensure connection to the underlying
layers that are typically included in a roof construction, ie underfelt,
insulation and vapour barrier (see chapter 7).
BDX 2000
Installation set consisting of frame insulation collar BDX and under-
felt collar BFX with drainage gutter.
BFX
BDX
Installation products
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