This polyester-based torch-on underlay is designed for use within multi-layer bituminous felt roofing systems. The product features a sanded surface and APP modified bitumen, which allows for versatile application across a range of roof types.
Typically used as the base layer beneath an APP cap sheet, it is suitable for both new projects and refurbishment work on flat, sloped, or vertical surfaces. The underlay is generally fixed by torch-on methods, offering a practical solution for commercial and domestic roofing tasks where a reliable substrate is required.
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