Designed to Save Energy in Your Home

We are committed to providing the very best in energy efficiency and thermal performance. Every window and door is assessed and engineered to prevent as much heat loss as possible.

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Explanation of U Values
A U-Value is a measure of heat loss through a structural element. Calculated on the rate at which heat transfers through 1 square metre of a structure and is stated in W/m2K. When it comes to U values, lower is always better!
U Value Regulations
U1.6 W/m2K is the current standard for replacement windows. U1.8 W/m2K is the current standard for replacement doors. We continually beat those standards by a significant margin.
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EnviroCore
A range of our windows are EnviroCore, this means it uses 30% lead-free recycled content which reduces PVC-U waste.
Conservatory & Extensions
These products have outstanding energy efficiency with a U-value of only 0.10W/m2k.
WarmCore
Our windows can provide you with a U value of as low as 0.8 W/M2K. While our doors go as low as 1.0 W/M2K.
Weather Tightness
BS6375-1 is the classification for weather tightness on windows and doors. Our products comfortably exceed these requirements.
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WarmCore
Our Triple Glazed WarmCore doors have up to 75% better thermal performance compared to other systems.
Thermal Break Technology
Our Roof Lanterns keeps you warm in the winter and cool in the summer. It also is up to 65% more thermally efficient than conventional roof systems.
Flat Roof Lights
We have engineered these for thermal performance, which has lead these to have a frame ‘U value’ of only 1.0 W/m2K.
Optional Thermal Upgrades
We offer optional upgrades on some of our products that can bring UV protection up to 73%.
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