Flat Roof Insulation U Values

Free online u value calculator.

Flat roof insulation u values. U value of a flat roof. Column b is for other extensions upgraded existing thermal elements non exempt conservatories and conversion of unheated buildings. Regardless ashrae s new above deck roof insulation standard is a good place to start as it jumped 33 percent from r 15 to r 20 in five of six climatic regions. Know exactly how much you need with our project calculators.

Ultimately selecting which product and value to use depends on many factors particularly thermal load. The easiest way of getting a u value calculation is by using our free online u value calculator. Column a is for extensions where the existing dwelling s walls and roof u values are worse than 0 70 w m k in the walls and worse than 0 25 w m k in the ceiling. Our guides to building regulations in england adl1a 2013 building regulations.

Specify your desired u value before immediately calculating the required insulation thickness and product selection. Our u value calculator is a free online tool which will help calculate the required thickness of insulation to achieve the desired u value. For more information see our articles and how to videos below. These can be supported with a detailed report.

Ecotherm s u value calculator is simple to use easy to tweak and provides an instant u value. We provide u value calculations to show compliance with current building regulations standards and best practice. When determining how much insulation you need don t guesstimate calculate. England new dwellings.

The saint gobain insulation uk online u value calculator covers a variety of different insulation applications. The lower the u value the slower the rate of heat flow and the better the insulating quality. Providing you with instant calculations all day everyday with step by step options and hints and tips along the way the no jargon u value calculator takes you through your construction build up until each element is included. R value measures how well certain building insulation materials can resist heat.

A lower u value indicates better insulation properties hence u value requirements usually specify a maximum value. Work through your own construction detail to get an early indication of the u value that this might achieve. To comply with part l of the building regulations 2010 all roofs to rooms except those in unheated buildings should be thermally insulated to a maximum u value of of 0 18 w m k. The higher the r value the greater the insulation performance.

A u value of 0 55 w m k is used for cavity insulation and 0 30 w m k for internal or external wall insulation. The calculator can be used to calculate u values for floor wall pitched roof and flat roof insulation applications.