Chesterfelt Debovent - Torch-On Felt Venting Base Layer - 16m x 1m

Chesterfelt Debovent - Torch-On Felt Venting Base Layer - 16m x 1m is a venting base layer for felt / bituminous flat roof system applications, helping create reliable waterproof protection on flat roofs.

This venting base layer 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
• Roll Weight: 24kg
• 10 / 20 year system guarantees available on this product group: Varies according to which Chesterfelt product range this is used with
• System type: Felt / bituminous flat roof system
• Designed for long-lasting waterproof protection when installed as part of the correct system
• Roll size: 16m 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

Coverage

• Roll coverage: approx. 16m² 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.
• Debovent is used as a perforated venting layer beneath multi-layer torch-on felt systems where controlled venting or partial bonding is required.

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