R-value (insulation) typical straw bale houses have very thick walls and thus are well insulated. Snow is roughly R-1 per inch. Brick has a very poor insulating ability at a mere R-0.2 per inch; however it does have a relatively good thermal mass. Note that the above examples all use the U.S. (non-SI) definition for R-value. When determining the overall thermal resistance of a building assembly such as a wall or roof, the insulating effect of the surface air film is added to the thermal resistance of the other materials. In practice the above surface values are used for floors, ceilings, and
Building and Construction Authority BCA International, a wholly owned subsidiary formed by BCA, paves the way for local construction companies to offer a full scope of expertise and value-added services to assist overseas governments and clients in developing excellent built environments. BCA also established a Construction Productivity Gallery and a Centre for Lean and Virtual Construction to guide and advise construction firms on the latest construction technologies and re-engineering processes to achieve time and labour savings. This is in line with Singapore’s national productivity drive, where BCA introduced a S$250-million Construction Productivity and Capability Fund (CPCF) in June 2010 to help the construction industry