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
Construction industry of the United Kingdom Construction industry of the United Kingdom The construction industry of the United Kingdom contributed gross value of £64,747 million to the UK economy in 2004. The industry employed around 2.2 million people in the fourth quarter of 2009. There were around 194,000 construction firms in Great Britain in 2009, of which around 75,400 employed just one person and 62 employed over 1,200 people. In 2009 the construction industry in Great Britain received total orders of around £18.7 billion from the private sector and £15.1 billion from the public sector. While manufacturing in the United Kingdom shrank as a proportion of