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 £15 billion projected cost. Prospective major construction projects include either expansion of London Heathrow Airport or expansion of Gatwick Airport, construction of the High Speed 2 rail line between London and the West Midlands, and construction of the Crossrail 2 rail line in London. The industry was pushed into a period of turmoil following the Brexit vote in June 2016. Fears of a lack of EU labour post-Brexit were cited as a key reason for the uncertainty. Despite this, the industry has been performing better than expected in the months since, leading to cautious optimism in some quarters. Construction industry