Harcon Vapour Permeable Roofing Felt (VPU) - 50m x 1m Roll Harcon VPU has a 3 layer composite structure with the highly vapour permeable film bonded between two layers of nonwoven polypropylene. The top polypropylene layer provides high levels of water resistance while the bot... Read More
Harcon Vapour Permeable Roofing Felt (VPU) - 50m x 1m Roll
Harcon VPU has a 3 layer composite structure with the highly vapour permeable film bonded between two layers of nonwoven polypropylene.The top polypropylene layer provides high levels of water resistance while the bottom layer provides the strength for this flexible breather membrane which can be used in both unsupported and fully supported applications.
Properties
Length: 50m.
Width: 1m.
Thickness: 0.5mm.
Weight: 125gsm.
Roll weight: 6.25kg.
Colour: bright blue.
Application
A vapour permeable membrane has 4 functions to perform.
Condensation Control
It allows warm moist air generated in the building to pass freely through it, helping to prevent condensation in the roof. As it is waterproof the water drops created by the condensation which forms on the primary roof covering will simply roll down the Harcon VPU into the gutter.
Secondary Roof Covering
Stops any rain or snow which penetrates the roof tiles or slates getting into the building below.
Temporary waterproofing
During construction and if the primary roof covering is damaged Harcon VPU will protect the structure below.
Wind
Harcon VPU will prevent wind and any particles it may be carrying entering the roof void.
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