The Mineral Capsheet is a premium SBS modified bitumen torch-on membrane ideal for built-up flat roofing systems (10 degree slope). With a robust 200g spunbond polyester base, it offers remarkable tensile strength and durability. Designed to withstand harsh weather conditions, it ensures watertightn...

Highlights

SBS‑modified bitumen with 200 g spun‑bond polyester base
8 m long × 1 m wide roll
Tensile strength 890 N/50 mm (length) and 590 N/50 mm (width)
Flexible down to –5 °C, water‑tight and tear‑resistant
Weight approx 3.6 kg/m² (8 lb/ft²)
Store above 10 °C, use with sanded capsheet underlay

Key specifications

Material: SBS-modified bitumen with 200g spun-bond polyester base
Colour: Black
Roll length: 8 m
Width: 1 m
Cold bend flexibility: Down to –5 °C
Storage temperature: Above 10 °C

Pros

High tensile strength in both directions
Remains flexible at low temperatures (–5 °C)
Water‑tight and tear‑resistant
Can protect a roof for up to 10 years when used as final layer

Cons

Requires a torch for installation, so extra equipment is needed
Must be stored above 10 °C before use
Relatively heavy at about 3.6 kg per square metre

Frequently asked questions

What is the roll size?

The roll is 8 metres long and 1 metre wide.

Can it be used in freezing temperatures?

It remains flexible down to –5 °C, so it works in cold weather.

What surface should I store it on?

Keep the roll upright on a dry floor, above 10 °C, before installation.

Price history

Lowest price for B&Q - Premium Torch-On Heavy Duty Roofing FeltDurable Mineral CapsheetSbs Modified Bitumen Membrane 8M Roll X 1M Wide Black over the last 90 days.

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