Universal Non-Breathable Underlay
Verified by manufacturer 5 days ago
BBA Agrément Certificate
Certificate type
A lightweight, high-performance, non-breathable membrane for pitched roof and vertical applications.
Application
Suitable for pitched roof, vertical tiling and rainscreen applications.
Description
Universal non-breathable underlay is a lightweight (116 g/m²), high-performance membrane for pitched roofs. Supplied in 50 x 1 m rolls with integrated tape for sealing laps, the underlay is fully compliant with BS 5534 and suitable for all UK wind zones 1–5.
Features and benefits:
- Non-breathable.
- High tensile and tear strength.
- Clean and easy to handle.
- Durable.
- UV resistant.
- BBA approved.
- Lightweight alternative to traditional membranes.
- Integrated tape for sealing laps.
- Guidance lines for minimum laps.
General information
Color | Black |
Finish | Textured |
Material | Polypropylene |
Shape | Rectangle |
Length | 50000 mm |
Width | 1000 mm |
Height | 0.5 mm |
Warranty description | 15 year |
Uniclass | |
CAWS | H67/5 Metal roof tiling H67/110 Metal roof tiling H65/5 Roof tiling H65/135 Ceramic slate roof tiling H65/125 Reconstituted slate roof tiling H65/115 Concrete roof tiling H65/105 Clay roof tiling H65/10 Reconstituted slate roof tiling H64/110 Wood shingle/ shake roofing H64/10 Wood shingle/ shake roofing H62/3 Roof slating H62/145 Roof slating H62/125 Roof slating H62/105 Roof slating H61/5 Roof slating H61/105 Roof slating H60/3 Roof tiling H60/120 Concrete roof tiling H60/105 Clay roof tiling |
SKU Code | MA33145 |
Specification data - Plastics sheets
Manufacturer | Marley Ltd. |
Material | Polypropylene. |
Purpose | Roofing underlay (impermeable). |
Standard | To BS EN 13859-1. |
Third-party certification | British Board of Agrément (BBA) certificate. |
Performance characteristics | |
Tensile strength (minimum) | Longitudinal direction: 260 N/50 mm. Transverse direction: 170 N/50 mm. |
Tear resistance | Longitudinal direction: 140 N. Transverse direction: 130 N. |
Elongation to break | Longitudinal direction: 60%. Transverse direction: 70%. |
Water vapour resistance (minimum) | To BS 3177, >2.5 MN·s/g. |
Fire performance | To BS EN 13501-1, Class F. |
Form | Spun-bonded. |
Physical properties | |
Colour | Black upper, grey lower. |
Weight (minimum) | 116 g/m². |
Dimensions | |
Thickness (minimum) | 0.5 mm. |
Width (minimum) | 1 m. |
Roll length (minimum) | 50 m. |
Adhesive | Integral adhesive tape. |
Class (minimum) | W1. |
Wind resistance | Zones 1–5. |
Sustainability data
Country of product manufacture | United Kingdom |
Material | Polypropylene |
Expected Life | 60 year |
Product certifications
BBA Agrément Certificate
BBA - MARLEY NON-BREATHER MEMBRANES
Literature
Marley Roofing Accessories Brochure