Polythenes DPC - Building Paper
Production description
A damp proof course ( DPC ) is a physical barrier inserted into the fabric of a building to stop water passing from one place to another. This can be on a horizontal plane, stopping water rising up from the ground by being sucked up by the dry masonry above, or vertically to stop water passing from the outside of a building, though the masonry, to the inside. DPC's have taken many forms through the ages and one of the earliest forms was to use a layer of slate in the construction. Slate is still used but the less expensive plastic version ( below right ) is now more widely used.
Recommended Use:
Used as a non-exposed dampcourse material in brick and blockwork walls and also
as a concealed flashing around internal window and door frames.
Sizes available
110mm x 30m /50m roll
150mm x 30m /50m roll
230mm x 30m /50m roll
300mm x 30m /50m roll
380mm x 30m /50m roll
450mm x 30m /50m roll
600mm x 30m /50m roll
Special sizes made to order
Technical Specification of DPC
Water Vapor Permeability |
0.28 gm2 day-1 |
BS3177 |
Water Vapor Transmission |
733 MNsg-1 |
|
Water Absorption |
0.22% |
BS2782 : 430A |
Resistance to Leakage at Joints |
PASS |
MOAT 27 : 5.2.1 |
Tensile Strength of Joint |
UNAGED : 300 N |
MOAT 27 : 5.2.2/3/4 |
Cold Flex Temperature |
−60°C |
BS2782 : 320A |
Tensile Strength |
L : 12.9 Nmm-2 |
BS2782 : 320A |
Elongation at Break |
L : 415% |
BS2782 : 320A |
Tear Strength |
L : 122 Nmm-1 |
BBA Method |
Low Temperature Flexibility |
L : <−25 |
MOAT 27 : 5.4.2 |
Dimensional Stability |
L : −2.0% |
MOAT 27 : 5.1.6 |
Mortar Adhesion Test |
PASS |
Cream Method |