THICKNESS 200UM-500UM
WIDTH 100mm-1500mm
LENGTH 30m-100m
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.
Technical Specification of DPC
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Water Vapour Permeability
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0.28 gm2 day-1
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BS3177
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Water Vapour Transmission
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733 MNsg-1
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Water Absorption
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0.22%
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BS2782 : 430A
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Resistance to Leakage at Joints
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PASS
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MOAT 27 : 5.2.1
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Tensile Strength of Joint
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UNAGED : 300 N
HEAT AGED : 290 N
WATER SOAK : 257 N
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MOAT 27 : 5.2.2/3/4
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Cold Flex Temperature
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−60°C
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BS2782 : 320A
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Tensile Strength
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L : 12.9 Nmm-2
T : 11.2 Nmm-2
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BS2782 : 320A
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Elongation at Break
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L : 415%
T : 582%
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BS2782 : 320A
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Tear Strength
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L : 122 Nmm-1
T : 96 Nmm-1
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BBA Method
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Low Temperature Flexibility
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L : <−25
T : <−25
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MOAT 27 : 5.4.2
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Dimensional Stability
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L : −2.0%
T : −0.3%
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MOAT 27 : 5.1.6
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Mortar Adhesion Test
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PASS
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Cream Method
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