Green guide and environmental profiles - An explanation of how the ratings are calculated (Version 2)

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We are all being encouraged to specify and use construction materials / products which minimise their impact on the environment. No one will argue with this in principle, but how do we decide which materials / products are the best to choose? To make informed decisions of this nature quickly, specifiers need an objective tool(s) backed up by calculated data.

Essentially, the Green Guide - which has been produced by BRE - is a listing of generic building products and elements with simple environmental ratings, underpinned by a complex methodology.

This Construction Briefing aims to give readers an understanding of the methodology behind the ratings as well as explain how the Green Guide works alongside other Building Regulations.

This sheet also contains a brief overview of some of the properties which make timber such a success by Green Guide criteria.


  • Definitions and terms
  • Codes which refer to the Green Guide
  • Calculating Environmental Profile (EP) ratings
  • Calculating the Green Guide ratings
  • Green Guide format
  • Future developments
  • How does timber fair?

Suggested Reading

Dynamic response of timber flitch beamsnavigation-arrow

Through experimental analysis, James Norman, Joel Ross, Robbie Kirkbride and Toby Hill-Smith outline the damping exhibited in these complex beams.


Article from Timber 2017 Industry Yearbook

01/03/2017 |  Magazine Article  

A motorway service station - but not as we know itnavigation-arrow

Exposed timber structures sympathetic to their rural surroundings are at the heart of a recently opened motorway service station in Gloucester.


Article from Timber 2018 Industry Yearbook

14/05/2018 |  Magazine Article  

Joinery: natural retreatnavigation-arrow

Outright winner of the prestigious Wood Awards 2017, the Coastal House is a showcase for the many uses of timber and some fine joinery.


Article from Timber 2018 Industry Yearbook

15/05/2018 |  Magazine Article