On Sun, 16 Nov 2008 19:20:28 GMT Phil L wrote :
Why housebuilders go down this route is beyond me - the cost of the thicker
blocks far outweighs the price of having regular blocks and CWI

IIRC the NHBC do not allow CWI in some exposed areas

--
Tony Bryer, 'Software to build on' from Greentram
www.superbeam.co.uk www.superbeam.com www.greentram.com