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Including underlays and membranes
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 | An average house produces 14 litres of moisture a day yet air leakage is a major contributor to heat loss. Energy saving, waterproof and airtight, WEB UV breather membranes allow moisture to escape and prevent air leakage. In particular, they offer: high tear strength to weight ratio, high breathability and they are available in a variety of weights and widths. | | | Web UV15 Professional (130 grams/m²) | 
| Most popular of all Web products, UV15 offers substantial increase in strength and abrasion resistance, and can be used between open rafters and on sarking boards. | | | Web 56 (the clean alternative to 1F felt) | 
| Web 56 contains a solid film that does not breathe; it is heavy and good for rough handling and is suitable for all ventilated cold roofs. | | |
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| Tyvek breather membranes for pitched roof constructions provide excellent protection against external weather conditions whilst allowing water vapour to freely move out of the construction. | | | | Tyvek Supro | 
| This durable Tyvek underlay reinforced with a laminated Polypropylene nonwoven can be used in all supported and unsupported pitched roof applications, including warm, hybrid and cold roofs. It is specially designed for the rough installation related conditions of fully boarded roofs and is also applicable for profiled cladding (metal sheet), pitched roofs and wall applications. | | | | Tyvek Metal | 
| This underlay is a vapour open drainage membrane with integral adhesive lap allowing eventual condensation beneath Stainless Steel, Copper and Zinc roofs to drain away. It is designed for use beneath standing seam metal sheet roofs over timber boarding and even more important over softwood boarding. | | | |
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Roofshield | 
| Roofshield is a unique air permeable, spun bonded polypropylene fabric that is manufactured in the UK. It offers the highest vapour permeability available and is used as a breathing underlay for pitched roofs. It meets the following basic criteria: waterproof, wind resistant, UV stabilised, rot proof and tear resistant. | | | |
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