Steve

I think you are greatly misunderstanding the basis of the BREEAM rating system and why it is so difficult to achieve a very high percentage.

Some of the points are contradictory in that if you score well on some you will find it very difficult to score highly on another.
For example points are given for being near to transport facilities but then you are likely to lose points in an urban location through not being able to have natural ventilation.

A green roof will not get you many (if any) points.

BREEAM is a very broad assessment and I dont think you will get anywhere near 100%, its just too difficult not to mention expensive.
For one you will probably score nil on the ecology section if its an existing building thats your 100% gone already.

Dare I suggest you talk to an assessor who will put you in the picture. The GBC are absolutely correct and even roofcrete wont change that. Sorry.

attached is a Report From University of Brussles where is confirms the Sustainability of the product " roofkrete " now manufactured by Krete Sustain Systems Ltd
the report compares the Sustainability / Durability of all the Leading European Waterproofing Membranes

it is critical of the "Green Guide to Building "--which for some strange reason rates single ply pvc as A+

it suggest that the Advertising Standards Authority might wish to get involved because many acedemic/ writers quote pvc as being the Antithesis of a Green Product "

Brussels University have just issued a comparison report on the sustainabilty of almost all european waterproofing membranes including single ply pvc , single ply tpo , bitumen , mastic asphalt , and liquid waterproofing systems.
The report highlights the importance of "embodied energy " and "transport embodied energy " and durability/ long life
The Report is now available on Google Documents please use this link to access the Report: https://docs.google.com/document/edit?id=1SVEgMhb8DCk3iKYiYgJQWVqBhv-b0dRKnffREI1Qu8g&hl=en
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