If you have a target u value in mind then the calculator will give you the thickness of insulation needed.
Flat roof target u value.
Insulation for walls including cavity walls solid walls and timber or steel framed walls.
Check out our guide on what performance is required for the uk insulation building regulations.
Column b is for other extensions upgraded existing thermal elements non exempt conservatories and conversion of unheated.
Walltite is applied directly to the underside of the plywood decking between the roof joists.
Existing buildings do not require a target co2 emissions rate however they do require a target u value to meet for building elements walls floors and roofs.
The u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation products.
0 25 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.
When used in conjunction with spray applied foam any external weatherproofing must be of low vapour resistivity e g.
For the majority of flat roofs built up in a series of material layers each of a consistent thickness and performance the most appropriate calculation type is the combined method detailed in bs en iso 6946.
Using a target based methodology for new buildings in standard 6 1.
This u value calculator covers all the main ways of building walls flat roofs pitched roofs and floors using kingspan insulation.
The quick free and easy way to find out the insulation thickness and the u value you need for your building project.
Then simply adjust the thickness or the u value until you are happy and the calculator will do the rest.
Where a building has external walls with a u value poorer than 0 7 and a roof with a u value poorer then 0 25 then the more.
The thermal transmittance or u value of the complete roof system is calculated in accordance with established international standards.
The target u value for flat roofs on existing buildings other than dwellings are shown in table 4 below.
Insulation for flat roofs pitched roofs and balconies and terraces.
Ecotherm s u value calculator is simple to use easy to tweak and provides an instant u value.
Unsure what level of thermal performance you require.
Get a u value calculation from our free online u value calculator or our technical department.
