Important Information: For all updates and Celotex announcements since June 2017, please see the links below...  See more

Declared lambda values - Read more >

5000 Class 0 testing - Read more >

Rainscreen cladding & RS5000 - Read more >


Here is a page dedicated to questions frequently asked by our customers.

U-value Calculator
Start your U-value calculation >
Use the calculator

Filter by category or search for what you need to know

What are the Target U-Values for England, Wales and Scotland?

Target U-values for floors, walls and roofs can vary depending upon the nature of the project. Key factors that affect compliance are whether the building is domestic or non domestic and whether the project relates to a new or existing building. In addition, different performance targets now apply in England, Scotland and Wales. The requirements of the building regulations are laid out in the following documents: England: Approved Document L. Wales: Approved Document L (Wales). Scotland: Scottish Technical Handbook - Section 6.  Further guidance on elemental U-values can also be found in the Celotex Handy Guide

Contact the Celotex Technical Centre

We’d like to make finding the answers to your questions as simple as possible, and want to help you use our website with ease.

Take a look at our collection of questions. If your query cannot be answered on this page, please contact the Celotex Technical Centre on 01473 820850

Can't find what you're looking for? Contact us with your query Calculator Icon