Since the 1940s, social, political, technical and market forces have been at work to reduce the market share for masonry in construction. Thin layer mortar technology, which is rapidly gaining in popularity among UK builders, overcomes many of the actual and perceived disadvantages of conventional masonry techniques. Thin layer mortar is easy to mix on site, adding only water. The laying technique is simple and fast using large accurately sized block units and less mortar. The result is increased productivity and savings in labour and materials. Thin layer mortar technology complying with building regulations and relevant codes of practice aims to retain masonry as a preferred option for house construction. 8 pages.