U-Value.com is an AI-powered platform designed to help UK architects, engineers, and building professionals calculate thermal transmittance values quickly and accurately.

Our Mission

We believe that accurate thermal calculations shouldn't require expensive software or hours of manual work. Our mission is to make BR 443 compliant U-value calculations accessible to everyone in the construction industry.

How It Works

AI-Powered Analysis

Upload a construction drawing and our AI identifies all layers, materials, and calculates thermal properties automatically.

BR 443 Compliant

All calculations follow BR 443 conventions and BS EN ISO 6946 methodology as required for UK Building Regulations.

Instant Results

Get your U-value calculation in seconds, complete with downloadable PDF and Excel reports for Building Control.

Standards & References

BR 443: Conventions for U-value calculations (2019 edition)
BS EN ISO 6946: Building components and building elements - Thermal resistance and thermal transmittance
Approved Document Part L: Conservation of fuel and power (2021 edition)