Fabric · Construction

U-value calculations and fabric optimisation

Project-specific calculations for walls, roofs and floors, with practical advice to optimise insulation build-ups and whole-dwelling fabric performance.

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Insulation thickness being measured within an external wall build-up

Overview

A U-value describes the rate of heat transfer through a building element. The calculation should do more than report a number: it should reflect the proposed layers, materials, thicknesses, repeating thermal bridges and boundary conditions, then help the project team refine a buildable specification. Because this work can sit alongside SAP assessment, construction changes can be considered in the context of the dwelling as a whole rather than as isolated elements.

Good to know

Project requirements vary by building type, location and timing. Send us the project information and we will confirm the right assessment route before providing a quotation.

Particularly useful for

  • Walls, roofs and floors
  • New construction and refurbishment
  • Insulation build-up and material comparisons
  • Design teams balancing performance, thickness, buildability and cost

Our approach

  1. 01

    Review the proposed construction, constraints and target performance

  2. 02

    Check product data, material assumptions and repeating bridges

  3. 03

    Calculate the project-specific U-value using the relevant conventions

  4. 04

    Compare practical fabric options and explain their effect on the wider energy strategy

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Send us the project

Upload the drawings and a few project details. We will review what is needed and confirm the scope before work begins.

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