The U-value calculation built for the Future Homes Standard
Per-configuration U-value and G-value calculation, built into your quoting workflow. Ready before March 2027.
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What Windowmaker calculates on every quote
The reference window shortcut is gone. Here is what the new methodology requires, and what Windowmaker handles automatically.
U-value per frame
Change the size, add a Georgian bar, switch the glazing. Each is a new calculation. Windowmaker runs it on every configuration before the quote goes out.
G-value alongside every U-value
The standard covers solar gain as well as heat loss. Both figures are calculated together, for every frame, as part of the same workflow.Averaged across the whole dwelling
Every frame on the job assessed as a whole. A stronger window can offset a weaker one. Windowmaker runs the dwelling average before anything is committed.
See how it works for your business
Book a demo and we will show you the calculation working on your own configurations.
Not ready to talk? Go deeper.
Everything you need to know about U-value compliance.
New rules apply to UK new-build from March 2027. What window and door fabricators need to know, and the three things to do this quarter.
U-value, G-value, and the New Building Regulations
A practical look at U-value, G-value, and what ADL1:2026 means for UK window and door fabricators quoting into new-build from March 2027.
Windowmaker Software Ltd. Building software for window and door manufacturers since 1983.