Floor Slab U Value Calculator

U value requirement opaque doors 1 0 w m k.

Floor slab u value calculator. Welcome to the jablite u value calculator for floors walls and inverted roofs. This simple u value calculator can help you quickly check your designs or plans to see if they are likely to achieve bs en iso 6946 2017 compliance. U value calculator version 3 70. U value requirement floor 0 13 w m k.

Calculation of thermal transmittances. Depending on the use of the building the slab can then be finished ready for use or receive a screed suitable for a floor finish. The u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation products. A simplified method of calculating the u value of an uninsulated floor has been described in bre information paper ip 3 90.

A reasonable r value for a normal concrete slab can be estimated using an r value the thermal resistance per inch of thickness between 0 1 and 0 2 and multiplying it times the slab thickness. Calculating the inverse of that 1 r would give you a u factor in the range of 1 67 to 0 83. For a 6 inch slab r value would be between 0 6 and 1 2. U value requirement semi glazed doors 1 2 w m k.

There are a few good u value calculators online that if you are short on time are worth. However the following expression can be used to compute r this equation is provided by astm c 168. Building width m building length m building area m2 building perimeter m. A reasonable r value for a normal concrete slab can be estimated using an r value the thermal resistance per inch of thickness between 0 1 and 0 2 and multiplying it times the slab thickness.

A useful tool for designers architects and the general public to quickly calculate the u values of different elements within a building. U value requirement windows whole window u value 1 4 w m k. Recent changes to the building regulations have reduced the stipulated u value for floors from 0 45 to 0 25 w m k. U value requirement roof 0 13 w m k.

The quick free and easy way to find out the insulation thickness and the u value you need for your building project. Sign up to jablite updates.