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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Developers and their design and certification 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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Xtratherm’s range of non-combustible, Euroclass ‘A1’ stonewool insulation provides surety when the highest fire performance is required. Stonewool Rainscreen insulation is suitable for use in ventilated facade, rainscreen and framing applications and closed systems such as curtain walling.


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

detailing accessories

Are you NZEB ready?

27th June 2019

If you’re planning to build, it’s important to be aware of new building standards coming into effect in 2020.

What are Nearly Zero Energy Buildings?

Nearly Zero Energy Buildings are defined as buildings with a very high energy performance. According to the Energy performance in Buildings Directive (EPBD), ‘the nearly zero or very low amount of energy required should be covered to a very significant extent by energy from renewable sources, including energy from renewable sources produced on-site or nearby.’


Why should I be NZEB ready?

The upcoming deadline from the Energy Performance of Buildings Directive for 2020 is approaching. New buildings that are occupied by 31st December 2020 must fulfil the NZEB requirements as required by Part L in legislation of the Building Regulations.

Nearly Zero Energy Buildings also provide significant benefits in terms of reducing operational costs and improving energy efficiency.


How do I get NZEB ready?

Getting ready to fulfil Nearly Zero Energy Building requirements doesn’t have to be difficult.

Ahead of the Energy Performance of Buildings Directive for 2020, here are 5 easy steps to show you how:

Fabric First

1. Fabric First Approach

Maximise the energy performance of your building through the materials used in making up the building envelope, before considering the use of mechanical or electrical building service systems. Choose CavityThermto reduce the amount of energy required to heat your house and reach the NZEB Zero/Low Carbon requirements.

2. Improve U-Values – U-Values are an indicator of how effective the building’s material is at preventing heat-loss. The new requirements place a greater emphasis on the fabric performance of your building to meet NZEB standards. Xtratherm have a wide product range of technically designed boards to help you achieve these with ease.

3. Thermal Bridging – Thermal Bridging is the optimisation of junction design, this coupled with bespoke calculations of the related Y-Values, can go a long way towards helping you to achieve NZEB compliance.

4. Air Tightness – The introduction of new NZEB standards will require an air pressure test result of no worse than 5m3/(h.m2)@50Pa. There will be more emphasis on designers to identify appropriate air barrier elements, details and establishing responsibility of the construction of details on your site. Let our experts talk you through how this can be achieved.

5. Clean Energy Renewables – Your build will require energy collected from renewable resources, which are naturally replenished on a human timescale – such as sunlight, wind and geothermal heat. For example, gas boilers will have to have a heating efficiency (heating and hot water) of 91% whilst 20% of the renewable energy ratio must come from renewable sources.


To talk to one of our experts or to find out more on how Xtratherm can help you get NZEB ready, click here.

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