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Damp Proof Membrane - Black Polythene Sheeting Roll - 20m x 5m

Damp Proof Membrane - Black Polythene Sheeting Roll - 20m x 5m

This black damp proof membrane (DPM) sheeting is designed to help prevent moisture rising through ...

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(20M X 5M) Damp Proof Membrane Black Polythene Sheeting Roll Dpm 4M 5M Wide 300Mu Brick 5056697227300

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OnBuy.com(20M X 5M) Damp Proof Membrane Black Polythene Sheeting Roll Dpm 4M 5M Wide 300Mu Brick 5056697227300
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£52.98
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B&Q - Damp Proof Membrane Black Polythene Sheeting Roll Dpm 4M 5M Wide 300Mu Brick 20M X 5M
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£58.28
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Product Information

Full details

This black damp proof membrane (DPM) sheeting is ideal for builders and DIY enthusiasts looking to prevent moisture ingress through floors and subfloors. Its key benefit is creating a dependable vapour barrier, ensuring a dry and stable construction. A minor caveat is its specific application, primarily for ground-level moisture prevention.

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Extended Product Information

FAQs

What is a Damp Proof Membrane (DPM)?

A Damp Proof Membrane is a barrier, typically made of polythene sheeting, used in construction to prevent moisture from the ground rising through floors and walls.

What does UKCE approval signify?

UKCE approval indicates that the product has been manufactured in accordance with specified UK and European standards, ensuring certain quality and performance parameters are met.

What is the recommended overlap for DPM sheeting?

The recommended overlap for DPM sheeting is a minimum of 150mm. This ensures a continuous barrier when joining sections.

Can this DPM be used on walls?

This DPM is primarily designed for ground-level moisture prevention in floors. While it can be lapped up foundation walls, it is not intended as a primary wall DPC for above-ground applications.

How do I ensure a complete vapour barrier?

A complete vapour barrier is achieved by ensuring all seams are overlapped by at least 150mm and securely taped, and by sealing any penetrations through the membrane.

What is the thickness of this membrane?

The product description specifies that the 'foil offered by our company has the actual thickness', implying it meets a certain industry standard for thickness, though a specific micron value is not provided in the given information.

Troubleshooting

Moisture still present after installation

Check for unsealed overlaps, gaps in the membrane, or breaches around penetrations. Ensure the membrane is correctly lapped up the walls.

Punctures or tears in the membrane

Repair immediately with appropriate DPM tape, ensuring the tape extends at least 100mm around the damaged area on all sides.

Difficulty in sealing overlaps

Ensure surfaces are clean and dry before applying tape. Use a compatible DPM tape or adhesive specifically designed for polythene sheeting.

Pros and Cons

Pros

  • Provides effective protection against rising damp.
  • Ensures a dry and stable building environment.
  • Meets UKCE standards for quality assurance.
  • Large roll size offers good value and coverage.
  • Simple to install in most construction scenarios.

Cons

  • Primarily designed for ground-level moisture; not for above-ground waterproofing.
  • Requires proper sealing to maintain vapour barrier integrity.
  • Can be punctured if not handled with care during installation.
  • Specific use case may require additional waterproofing solutions.

Setup, Compatibility & Care

Setup:

  1. Ensure the subfloor area is clean, dry, and free from sharp objects.
  2. Unroll the DPM sheeting, allowing it to relax if it has been tightly rolled.
  3. Lay the sheeting over the subfloor, ensuring sufficient overlap (minimum 150mm) between adjacent sections.
  4. Seal all overlaps and penetrations (like pipes or columns) using specialized DPM tape or compatible adhesive.
  5. Ensure the sheeting extends up the internal face of foundation walls by at least 150mm, creating a continuous seal.

Compatibility:

  • Compatible with most common building materials including concrete, screed, brickwork, and timber.
  • Ensure all tapes and adhesives used are specifically designed for DPM applications to guarantee a long-lasting seal.

Care:

  • Store the roll in a cool, dry place away from direct sunlight and extreme temperatures.
  • Handle the sheeting carefully during installation to avoid punctures or tears. If a puncture occurs, repair it immediately with DPM tape, ensuring the tape extends at least 100mm beyond the damaged area.

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