External Wall Insulation

View our selection of external wall insulation solutions for cavity walls, solid walls, rainscreen, timber frames, and metal walls.

As the leading provider of Europe’s specialist insulation brands, SIG offers a competitive and comprehensive range. Our technical building solutions team can add value to your project by providing u-value calculations, building performance assessments and architectural plan interpretations. This added service will help guide you towards a product selection that is high-performing, cost-effective and regulatory compliant.

Our selection of insulation products is carefully curated to offer premium cavity wall solutions that enhance the thermal performance of your external masonry cavity walls.

Elevate your construction projects with our premier cavity wall insulation range from top insulation manufacturers and embrace enhanced comfort, energy efficiency, and building performance.

Knauf Insulation

Explore the Knauf DriTherm Cavity Slab range, designed for full-fill insulation in external masonry cavity walls. Choose from the versatile DriTherm Cavity Slab 32, 34, and 37 options, each delivering optimal thermal efficiency.

Knauf Insulation products

ROCKWOOL

Full-fill and partial-fill insulation for masonry cavity walls with ROCKWOOL’s Full Fill Cavity Batts and High Performance Partial Fill Cavity Slab.

Rockwool PRODUCTS

Unilin / Xtratherm

Experience next-level insulation with Unilin / Xtratherm’s CavityTherm CT/PIR, Safe-R SR/CW, Thin-R Plus Cavity Wall Plus (T&G), Thin-R XT/CW (T&G), and Xtroliner XO/CW. These solutions offer cutting-edge thermal standards while maintaining a residual cavity.

Unilin / Xtratherm PRODUCTS

Our selection of high-quality solid wall insulation options enhances your buildings' energy efficiency and thermal comfort.

From the versatile Rockwool DD Slab with its Dual Density technology to the robust Kore EPS designed for concrete slabs, and the exceptional thermal and moisture-resistant capabilities of Foamglas, contact us today to discuss what material would be best for your project.

Rockwool DD Slab

Versatile insulation with Dual Density technology for robust fixing surfaces and seamless installation, ensuring long-lasting effectiveness in EWI systems.

Rockwool DD Slab PRODUCTS

Kore EPS

High-performance insulation for concrete slabs, screeds, and suspended floors. Made from durable Expanded Polystyrene (EPS) for consistent thermal and compressive performance.

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Foamglas

Foamglas can be effectively utilised for solid wall insulation, providing exceptional thermal performance and moisture resistance.

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Kingspan Kooltherm External Wall Board

Kooltherm K5 is a premium wall insulation board for masonry walls. Ultra-thin design with a thermal conductivity as low as 0.021 W/mK, it is ideal for traditional and lightweight renders, and hassle-free retrofitting.

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Explore our range of high-quality products designed to enhance building performance and energy efficiency. 

Elevate your rainscreen system’s performance with our range of top insulation solutions, including BBA-certified Knauf Rocksilk, Rockwool RainScreen Duo Slab with acoustic benefits, Unilin Safe-R SR/RS for compliant systems, and premium Kingspan Kooltherm K15. Explore these options for enhanced thermal efficiency and insulation in your ventilated cladding systems.

Knauf Rocksilk Rainscreen Facade Insulation

Rocksilk RainScreen Slab: BBA-certified Rock Mineral Wool insulation, non-combustible and Euroclass A1 fire rated,designed for use as sheathing insulation in rainscreen façade systems both below and above 18m in height.

KNAUF ROCKSILK RAINSCREEN FACADE PRODUCTS

Rockwool Rainscreen Duo Slab

RainScreen Duo Slab: BBA-approved, non-combustible insulation with thermal and independently-tested acoustic benefits for ventilated cladding systems.

ROCKWOOL Rainscreen Duo Slab PRODUCTS

Unilin (Xtratherm) Rainscreen Insulation

Unilin’s Safe-R SR/RS: Phenolic insulation with Euroclass B fire classification, low emissivity foil facings, and exceptional thermal efficiency (Lambda value as low as 0.020 W/mK), tested to BS 8414 for compliant rainscreen systems.

Unilin (Xtratherm) Rainscreen PRODUCTS

Foamglas Rainscreen Insulation

Foamglas Rainscreen Insulation: A moisture-resistant and thermally efficient solution for enhancing rainscreen system performance.

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Calostat Rainscreen Insulation

CALOSTAT Pad: Insulation featuring a core of CALOSTAT Pure sewn and grouted in fiberglass fabric, simplifying transport and enhancing thermal efficiency, ideal for various applications including facades, curtain walls, roofs, and building elements.

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Kingspan Kooltherm Rainscreen Insulation

Kooltherm K15 Rainscreen Board: A premium insulation solution with exceptional thermal efficiency as low as 0.021 W/mK, ideal for rainscreen facades.

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Achieve thermal efficiency and comfort in your timber frame insulation projects with our top insulation range.

Including Knauf Insulation FrameTherm Rolls, OmniFit, and Rocksilk Building Slabs. Optimise performance and compliance with solutions like Kingspan Kooltherm External Wall Board, ROCKWOOL Full Fill Cavity, Unilin Safe-R SR/FB, and YBS SuperQuilt or ThermaQuilt. Contact us today to find out what insulation would be the right fit for your timber frame construction project.

Knauf Insulation FrameTherm

Knauf Insulation FrameTherm Rolls 32, 35, and 40 (Ready-cut), along with FrameTherm Slab 32. Achieve optimal thermal efficiency and comfort for your timber frame construction projects.

Knauf Insulation FrameTherm PRODUCTS

Knauf OmniFit

Knauf Insulation OmniFit Rolls 34 and 40, along with OmniFit Slab 35 are the perfect fit for timber frame insulation. Experience exceptional thermal performance and versatility for your construction needs.

KNAUF OmniFit PRODUCTS

Knauf Insulation Rocksilk

Discover versatile insulation solutions for your timber frame projects with Knauf Insulation Rocksilk RS45, RS60, RS80, RS100, RS140 Building Slabs, and Rocksilk Flexible Slab. Achieve exceptional thermal and acoustic performance across applications, all while benefiting from its non-combustible and eco-friendly Rock Mineral Wool composition.

Knauf Insulation Rocksilk PRODUCTS

Knauf Insulation Timber Frame Party Wall Slab

This Glass Mineral Wool insulation is designed for timber frame party separating walls, offering non-combustible and eco-friendly performance. Achieve compliance with building regulations and simplified installation through its unique qualities and compatibility with various constructions.

Knauf Insulation Timber Frame Party Wall Slab PRODUCTS

Rockwool

Discover ROCKWOOL FLEXI, a non-combustible multi-use insulation slab perfect for any home project. Enhance timber frame compliance with the specialised Timber Frame Slab, designed to meet thermal, fire, and acoustic requirements. Or choose the reliability of ROCKWOOL RW3, an exceptional insulation choice suitable for a wide array of applications, including commercial, leisure, and industrial projects.

ROCKWOOL PRODUCTS

Unilin (Xtratherm)

Enhance timber frame insulation with Unilin’s (Xtratherm) Safe-R SR/FB for steel or timber applications, delivering excellent U-Values and fire classification. Or use Unilin’s Thin-R XT/TF in timber framed walls to achieve superior thermal performance and Future Home/Passive House Standard.

Unilin (Xtratherm) PRODUCTS

YBS

YBS SuperQuilt, the UK’s leading reflective multifoil insulation, offers exceptional thermal performance and moisture resistance. Alternatively, consider YBS ThermaQuilt, a cost-effective multilayer insulation solution that effectively handles energy transfer, reducing condensation risk and ensuring long-lasting thermal integrity for roofs, walls, and floors.

YBS PRODUCTS

Elevate your metal wall insulation with our selected range of rolls and slabs in various thicknesses.

These versatile solutions provide optimal thermal performance, enhancing built-up metal structures with exceptional insulation benefits.

Knauf Insulation OmniFit

Enhance your metal wall insulation with Knauf Insulation OmniFit rolls 34 (Uncut), 40 and slab 50. These versatile solutions offer optimal thermal and acoustic performance for uncut or tailored applications, ensuring efficient insulation for metal walls.

Knauf Insulation OmniFit PRODUCTS

Knauf Insulation FactoryClad 32 (Uncut)

Whether you choose FactoryClad Roll 32 or Roll 40, these Glass Mineral Wool rolls offer top-tier thermal performance and durability, enhancing built-up metal structures with exceptional insulation benefits.

Knauf Insulation FactoryClad 32 (Uncut) PRODUCTS

Knauf Insulation Rocksilk Building Slabs

From RS45 to RS140, these versatile Knauf Insulation Rocksilk building slabs offer a range of thermal and acoustic solutions, ensuring optimal performance and comfort for your metal wall structures.

Knauf Insulation Rocksilk Building Slabs PRODUCTS

ROCKWOOL Cladding Roll

Cladding Roll is a stone wool insulation specifically developed for use within twin skin systems. In addition to thermal comfort, the product provides independently-tested acoustic and fire resistance properties.

ROCKWOOL Cladding Roll PRODUCTS

Unilin (Xtratherm) Safe-R SR/FB

Unilin's Xtratherm Safe-R SR/FB enhances metal wall insulation with its optimal density and Euroclass C-s1 d0 Fire Classification. Achieve excellent U-Values and superior thermal bridging detailing, ensuring high-performance and compliant solutions for metal-clad walls.

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Kingspan Kooltherm & Therma

Kingspan Kooltherm K12 Framing Board offers premium insulation for timber and steel framing with a thermal conductivity of 0.019 W/mK. Kingspan Therma TF70 features high-performance PIR core insulation with 0.022 W/mK thermal conductivity, tailored for various applications including pitched roofs, ground floors, and framing systems.

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

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