Full Fill Built-in Insulation System Continuous wall insulation system that delivers ultimate thermal performance with the added assurance of protection from wind driven rain.

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The Xi products have been developed to deliver the U-value requirements to meet Passive standards. It’s no longer just about U-values: how the system builds, how it interconnects at junctions and how it is witnessed and confirmed on site, are all equally important facets.

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Xtratherm offer an extensive range of technically enhanced rigid insulation products for commercial and industrial projects

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Tapered Roofing System
The XtraFall system provides a high performance precision solution to thermal insulation and water drainage on at roofs.

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The Xtratherm range of high performance insulation boards provides the ideal technically advanced solution for flat roof projects.

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PLATINUM SERVICE for Developers

PLATINUM SERVICE for Developers

Developers and their design and certifcation team can rely on the expertise and professional support of the whole Xtratherm Team - it is not just about buying insulation products.

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PLATINUM SERVICE for Self Builders

PLATINUM SERVICE for Self Builders

Our Platinum Service offers full technical support and advice, helping you to achieve a cost effective, passive standard new home.

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Full Fill Built-in Insulation System

Continuous wall insulation system that delivers ultimate thermal performance with the added assurance of protection from wind driven rain.

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High Performance rigid extruded polystryrene

Xtratherm offers a cost effective solution for builders and specifiers for the closing of cavities around window and door openings, preventing cold bridging, damp penetration, air infiltration and condensation.

CavityTherm Accessories

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At Xtratherm Xi Academy we understand the importance of giving our customers the best technical advice. The Xi Academy is open to everyone from Builders and Architects to Secondary Education Pupils to learn about advanced building methods, insulation and sustainability.

Warm-R External Wall Insulation Board

Applications: Wall / Partial

Warm-R External Wall Insulation Board

The Xtratherm EWB/EPSP is an Expanded Polystyrene with Graphite/Carbon Enhancement. The graphite particles act as infrared absorbers to reduce heat dissipation caused by the radiation. This improves the thermal conductivity of the board to 0.031 W/mK, an improvement on conventional expanded polystyrene products

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Product Range

EPS is a high quality Polystyrene product. Our EPS products consists of rigid polystyrene boards cut from moulded blocks of standard EPS (Warm-R) or with graphite enhancement (Warm-R Premium). The boards are manufactured in square edge, T&G and shiplap jointing.
We have EPS products suitable for partial fill cavity wall and underfloor applications.

Xtratherm reserves the right to change this information without notice.
Xtratherm accepts no responsibility for errors or omissions on the website.

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All the members of our technical team are individually BBA accredited to help you reach your low energy goals. Fill out your details below to request a call back: