Chesterfelt Laser Gold - Torch-On Felt Underlay - 3mm - 12m x 1m

Chesterfelt Laser Gold - Torch-On Felt Underlay - 3mm - 12m x 1m is a underlay felt for felt / bituminous flat roof system applications, helping create reliable waterproof protection on flat roofs.

This underlay felt is used as part of a built-up felt roof system to create layered waterproof protection. It is commonly used on garages, extensions, dormers, porches and outbuildings, either over new OSB/plywood decking or suitable existing felt overlays where the full system allows.

Best for

• Built-up felt flat roof systems
• New boards or compatible existing felt overlays

Key features

• Brand: Chesterfelt
• SBS modified glass fibre base sheet
• 20 year product guarantee (subject to roof specification)
• Manufacturers Part Number: P901
• Roll Weight: 34kg
• 20 year system guarantees available on this product group
• Designed for long-lasting waterproof protection when installed as part of the correct system
• Roll size: 12m x 1m

Application / installation

• Trade-only installation advised because torch-on work involves hot works and fire risk
• Install in dry, suitable conditions unless the specific product states damp-weather application is allowed
• Surface must be clean, sound and prepared before application
• Allow for laps, overlaps and correct layer sequencing in the felt system

System components / used with

• Torch-on cap sheets, underlays and venting/base layers
• Bitumen primer, felt adhesive or mastic where specified
• OSB/plywood decks or compatible existing felt overlays
• Gas torch equipment and suitable PPE for hot works
• Manufacturer's suggested 3-layer built-up specification:
• Chesterfelt SBS Debovent torch on venting layer
• Chesterfelt Laser Gold SBS Mineral cap sheet

System guarantee

• The Chesterfelt Laser Gold range is a specification range of Torch On Felts, with a life expectancy of up to 20 years using high tensile polyester reenforcements with low melt SBS bitumen modifications.

Coverage

• Roll coverage: approx. 12m² before laps, overlaps and waste

Chesterfelt technical information

• Chesterfelt high-performance membranes are manufactured to ISO 9001 quality standards and are CE marked and UKCA to EN 13707:2004+A2:2009.
• Laser Gold is designed for flat roofing projects including new build and refurbishment work, cold roofs and warm roofs using vapour control layers with insulation.

Things to consider before buying

• Coverage is approximate; allow extra for laps, overlaps, detailing and waste
• Check substrate compatibility before ordering: OSB, plywood, concrete and existing felt overlays may need different preparation
• Install in dry conditions and avoid unsuitable cold temperatures unless the product data allows otherwise
• The surface must be clean, dry and free from loose material before application
• Hot works require suitable fire safety precautions and should be carried out by trained users