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Home Insulation Flat Roof insulation

Flat Roof Insulation

SIG’s Top Insulation Products for Flat Roof Insulation.

Our range of flat roof insulation solutions includes Kingspan Thermaroof and the Thermataper series, as well as Knauf Insulation Rocksilk Slabs, ROCKWOOL HARDROCK Multi-Fix boards, Unilin / Xtratherm Flat Roof Boards, and Ravago XPS. These premium options ensure exceptional thermal regulation, durability, and ease of installation, ensuring the best energy efficiency in your flat roof.

ravago XPS flat roof SIG


RAVATHERM XPS closed-cell polystyrene foam thermal insulations are manufactured using state-of-the-art technology, exclusively from quality raw materials. The special material structure guarantees efficient thermal insulation. Due to the closed, crystalline cell structure, RAVATHERM XPS is not sensitive to moisture, loadable and considerably reduces the thermal load on our buildings.

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Unilin-Xtratherm Flat Roof Board insulation

Unilin / Xtratherm Thin-R

Unilin’s high-performance Thin-R flat roof insulation range: FR/ALU, offering vapour-tight aluminium foil for single ply waterproofing; FR/BGM with polypropylene fleece bitumen/glass fibre finish; FR/MG featuring mineral-coated glass facers for single ply and partially bonded built-up felt systems; and TR/ALU, a tapered insulation with aluminium foil and an Environmental Product Declaration.

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Unilin Xtratherm Flat Roof Insultion Board FR/TP<br />

Unilin / Xtratherm Flat Roof Board

Unilin / Xtratherm Flat Roof Board FR/TP is suitable for flat roofs and use in damp environments. Gas-tight foil membrane facing ensures a continuous vapour control layer in damp environments, offering low thermal conductivity, robustness, and easy handling with saw or knife workability. Durable and will perform for the service life of the building.

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Rockwool HARDROCK insulation flat roof SIG<br />

Rockwool Hardrock

HARDROCK® UB34 is an impact and weather-resistant insulation solution for flat roof upstands and parapet walls.; while HardRock® Multi-Fix Recovery Board is a non-combustible solution ideal for flat roof refurbishment projects, compatible with various membranes; and HardRock® Multi-Fix (DD) is a BBA-approved insulation board that provides thermal, acoustic, and fire resistance properties.

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Rocksilk® Flat Roof Slab Extra

Knauf Insulation Rocksilk Flat Roof Slab / Extra

Rocksilk® Flat Roof Slab Extra: BBA certified, non-combustible Rock Mineral Wool for mechanically fixed flat roof build-ups, boasting superior mechanical performance, Euroclass A1 fire classification, and Knauf Insulation’s Krimpact® Technology.

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Kingspan Thermaroof TR24 flat roof<br />

Kingspan Thermaroof + Thermataper

Thermaroof TR26 and TR27, along with Thermataper TT46, offer a range of high-performance flat roof insulation solutions, providing versatile options for different waterproofing systems and green roofs. These systems, including the innovative Thermataper TT46, combine insulation and drainage, enhancing water management for mechanically fixed single-ply waterproofing on flat roofs. With a supporting design service, Thermataper TT46 ensures cost-effective solutions and tailored tapered system designs that fulfill rainwater run-off and insulation needs.

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Technical Building Solutions

Impartial product advice

Our specialist team will provide advice on energy saving construction products and guidance on building regulation compliance.

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