Flat Roof Insulation U Values

Ultimately selecting which product and value to use depends on many factors particularly thermal load.

Flat roof insulation u values.

Easy to access calculations. Ecotherm s u value calculator is simple to use easy to tweak and provides an instant u value. 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. 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.

The saint gobain insulation uk online u value calculator covers a variety of different insulation applications. Typical u values using rocksilk krimpact flat roof slab with single ply membrane. These can be supported with a detailed report. Our u value calculator is a free online tool which will help calculate the required thickness of insulation to achieve the desired u value.

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. Store u values in member project folders for future reference. U value of a flat roof 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 lower the u value the slower the rate of heat flow and the better the insulating quality.

Work through your own construction detail to get an early indication of the u value that this might achieve. The easiest way of getting a u value calculation is by using our free online u value calculator. Free online u value calculator. 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.

Rocksilk krimpact flat roof slab thickness mm 150mm concrete 40mm screed 13mm plaster. The calculator can be used to calculate u values for floor wall pitched roof and flat roof insulation applications. For more information see our articles and how to videos below. Specify your desired u value before immediately calculating the required insulation thickness and product selection.

We provide u value calculations to show compliance with current building regulations standards and best practice.