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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PIR Insulation
High-performance, energy efficient, structural building system

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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


PIR Insulation
Xtratherm UniSIPS is the ideal product when considering structural insulation solutions for wall, floor and roof panels. Technically advanced and thermally efficient, the load bearing panels provide a lightweight and economical solution to facilitate modern methods of construction.


PIR Insulation


Sarking Warm Roof Construction

Applications:Roof / Pitched


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)
50 0.19 0.17 0.15
3rd Layer @ 40mm 0.15 0.14 0.12
75 0.16 0.15 0.13
3rd layer @ 40mm 0.13 0.12 0.11
100 0.13 0.12 0.11
3rd Layer @ 40mm 0.11 0.11 0.10
125 0.12 0.11 0.10

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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.

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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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Talk to the team who can help you with your project

Our Technical Team provides technical services throughout our customer bases in Ireland & UK. Their experience and expertise has been built through our engagement and participation with the Irish construction industry for over 30 years.

Certified Technical Knowledge.

Solutions you can trust.

Call The Technical Team:
Tel +44 (0) 371 222 1055
Tel +353 (0) 46 906 6050

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