Product Overview
The Black Polythene Damp Proof Membrane is a polyethylene sheeting designed to resist moisture transfer from the ground into floor constructions.
Manufactured to consistent thickness and density, it provides a reliable barrier layer suitable for domestic and light-commercial slab applications.
Its flexible, tear-resistant structure supports straightforward cutting, laying, and jointing across prepared sub-base surfaces. The membrane offers compatible integration with insulation, concrete slabs, screeds, and damp-proof detailing at wall junctions.
Supplied in 125mu (500G) thickness on a 4m × 25m roll, providing 100m² of coverage.
Features & Benefits
- Moisture resistance: Forms an effective barrier against moisture rising from the ground.
- Consistent material quality: Manufactured to uniform thickness supporting predictable performance.
- Flexible installation: Suitable for laying over sand blinding or insulation prior to concrete placement.
- Durable sheeting: Resists tearing during handling and positioning on site.
- Compatibility: Can be used within standard floor build-ups including insulation and screed layers.
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Roll identification: Supplied in 125mu (500G) thickness on a 4m × 25m roll providing 100m² coverage.
Applications
- Ground floor slabs: Suitable for use beneath concrete floors in housing and light-commercial buildings.
- Screeded floors: Appropriate as a separating layer below sand/cement screeds.
- Insulation layers: Suitable for placement beneath rigid floor insulation where required.
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Construction refurbishment: Provides damp-proofing in upgrade or replacement floor systems.
Installation Guidance
- Sub-base preparation: Lay over a smooth, compacted surface or sand blinding to prevent punctures.
- Jointing method: Overlap sheets by recommended laps and seal using approved DPM tape.
- Edge detailing: Continue membrane up perimeter walls to meet the damp-proof course where required.
- Protection: Avoid damage from sharp objects or foot traffic during installation.
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Important note: Installation must comply with BS 8102 and relevant building regulations for moisture protection.
Compliance & Performance
- Material classification: Manufactured from polyethylene suitable for use as a damp-proof membrane.
- Moisture control: Designed to resist moisture penetration from the ground into building structures.
- Durability: Suitable for long-term service life when installed within a protected floor construction.
- Handling note: Store rolls in a clean, dry location and protect from direct sunlight prior to installation.
- Important note: Ensure compatibility with other elements of the damp-proof system including DPCs and insulation.