A+ BRE Green Guide Rating For Porotherm

The Porotherm construction system has achieved an overall A+ rating in the BRE Green Guide, the highest level available, recognising the product’s inherent sustainability credentials. The certification and inclusion in the Green Guide, the building materials industry bible, and makes it easier for architects and developers who specify Porotherm to demonstrate the environmental characteristics of their scheme.


The rating is awarded by BRE Global, which used its own Environmental Profiles Methodology to assess the environmental impacts of the product across its entire life cycle. The Green Guide rating system uses such data to classify performance in a number of key areas and awards a summary rating on a scale from E up to A+.


Porotherm 100mm, 140mm and 190mm blocks were all tested by the Building Research Establishment (BRE) in seven different external wall situations all of which received an A+ rating, Certified Environmental Profile and Eco Point score. The thermally efficient clay blocks also achieve the maximum of three points in the Code for Sustainable Homes Materials Category 1, which rates the environmental impact of materials.


Phil Noble, construction system director for Porotherm, said: “Wienerberger is committed to ensuring that all its products and activities are as environmentally aware as possible.


The Green Guide offers reliable, methodologically robust guidance and is available to specifiers seeking to minimise the impact of building materials. It was essential, therefore, to submit the Porotherm product for assessment to ensure inclusion in this ‘industry bible’.

“This is the latest in a series of accreditations which demonstrate the Porotherm system can be used to achieve high BREEAM and Code for Sustainable Homes ratings, reassuring specifiers, architects and developers of the eco-credentials of this innovative product.”


With the blocks already certified to the European eco label natureplus, the full system has also been validated by CERAM for performance, and been accepted by new home warranty providers the NHBC and LABC.


Used correctly, the Porotherm construction system can significantly increase construction speeds with 10m2 per man per hour realistically achievable, shaving up to 17 days off the build time of a typical family home. It is a virtually dry, efficient, strong, safe and environmentally-friendly construction method which offers commercial benefits through increased labour productivity and shorter project programmes.


It has excellent thermal performance due to precision-engineered air pockets and has a Class A fire retardance rating. The innovative design requires less clay and the blocks contain a minimum 20 per cent MARSS (recycled) content. The individual blocks also meet the requirements of European Standard BS EN 771-1 and carry the CE mark of approval for use in the UK.

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