The first suggestion that I should undertake a thorough re- vision and expansion of Mr. Blakes work on Damp Walls was made to me about 18 months ago by Mr. G. S. Wheeldon, CBE, FRICS, FAI, FVI, FRSH, my former Chief and my friend for many years. Although the original work has been unobtainable for a long time past, no other book dealing specifically with this important aspect of building construc- tion and maintenance could be traced. Yet the need...