125mu (500G) Black Polythene Damp Proof Membrane (DPM) 4m x 25m (100m2/Roll)
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Wed 10 Jun
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Key Features
- {{format_color_reset}} Blocks rising ground damp
- {{fitness_center}} Durable 500 gauge
- {{code}} Large roll, fewer joints
- {{check_circle}} Flexible, easy installation
Technical Specification
| URN: | 5004032 |
|---|---|
| Thickness: | 125mu |
| Width: | 4m |
| Length: | 25m |
| Sales Unit: | Roll |
| Sales Unit Coverage: | 100m2 |
| Gauge: | 500 |
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.
- 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.
- 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.
- 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.
Delivery & Returns Information
Delivery charges vary by product category and order value. Items may ship from different suppliers and arrive separately, so delivery charges can be shown per part of your order at checkout.
Standard (Nationwide) Delivery
|
Core Products Core
|
|
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 ex. VAT | £30 ex. VAT |
| Over £300 ex. VAT | FREE |
Core Delivery charges apply only when all products in an order that have equivalents are accepted as such. If even one product cannot be substituted with an equivalent, the entire order will not qualify for Core Delivery charges.
| Insulation, Plasterboard and Drylining Products | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £45 ex. VAT |
| Over £400 ex. VAT | FREE |
Express Delivery
| Express Delivery - Insulation and Plasterboard & Drylining | |
|---|---|
| ORDER VALUE | DELIVERY CHARGE |
| Under £400 | £90 ex. VAT |
| Over £400 ex. VAT | £55 ex. VAT |
| Express Delivery - Timber & Sheet, Building Materials, Joinery and Gardens & Landscaping Products | |
| ORDER VALUE | DELIVERY CHARGE |
| Under £300 | £50 ex. VAT |
| Over £300 ex. VAT | £35 ex. VAT |
How delivery works
We work with a nationwide network of trusted suppliers. Items in your basket may be supplied by different suppliers and delivered separately. Where this applies, you will see delivery charges shown at checkout for each part of your order. We always aim to group products from the same supplier to keep delivery costs as low as possible.
Delivery areas
Delivery charges apply to mainland UK, excluding: AB, CA, CF, DD, DG, EH, EX, FK, KA, KW, KY, IV, LA, LD, LL, ML, NP, PA, PH, PL, SA, SY, TR, TQ and TD.
If your address is in one of these areas, we will contact you before processing your order to confirm any additional costs. We do not currently offer delivery outside the UK mainland.
What to expect on delivery day
- Deliveries are typically kerbside.
- Please ensure someone is on-site to accept delivery. For heavier items, help with offloading may be required.
- Many building materials arrive on large vehicles. If access is restricted, a specialist vehicle such as a HIAB may be required and could incur an additional charge.
Why delivery can cost more than typical parcel delivery
Building materials often travel on larger vehicles and usually carry fewer drops per run than parcel networks. That is why delivery charges can be higher than standard e-commerce shipping.
Returns
Returns depend on what you have bought and whether there is anything wrong with it. For full details on eligibility, timeframes, and exclusions, please see our full policy.
