Thermal conductivity common use in the construction and textile industries. The construction industry makes use of units such as the R-value (resistance) and the U-value (transmittance). Although related to the thermal conductivity of a material used in an insulation product, R- and U-values are dependent on the thickness of the product. Likewise the textile industry has several units including the tog and the clo which express thermal resistance of a material in a way analogous to the R-values used in the construction industry. There are a number of ways to measure thermal conductivity. Each of these is suitable for a limited range
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