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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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
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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.

PIR Insulation

XT/SK (T&G)

Applications: Roof / Pitched

XT/SK (T&G)

Using Thin-R Sarking XT/SK (T&G) on sloped roof areas can provide the most efficient U-values with minimal intrusion into valuable living space. Warm roof construction is a particularly effective way of insulating complex roofs.

Insulating above the roof timbers ensures that the structure is kept at, or near the internal environmental conditions, reducing thermal stress and condensation risk. XT/SK is a robust T&G engineered jointed board that achieves excellent U-values at minimal thicknesses.

U-Value calculations to EN ISO:6946
XT/SK Insulation for Pitched Roofs

Rafters taken at 600mm centres

Sarking Over (mm)60mm (Between rafters)75mm (Between rafters) 100mm (Between rafters)
500.190.170.15
3rd Layer @ 40mm0.150.140.12
750.160.150.13
3rd layer @ 40mm0.130.120.11
1000.130.120.11
3rd Layer @ 40mm0.110.110.10
1250.120.110.10

Product Downloads

Product Range

Xtratherm Thin-R range is a high performance foil faced Polyisocyanurate (PIR) insulation with a certified thermal conductivity as Low as 0.022 W/mK. Thin-R is also available with engineered jointing to provide improved continuity and thermal bridging performance.

Key Points

  • Robust Tongue & Groove Jointing
  • Reduced Risk of Condensation
  • Avoids Intrusion into Living Area
  • Excellent U-value in roofs
  • Reduced Thermal Bridging

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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