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Ground Floors
(Thermal)

                                                     

 Prescribed U Value W/m2K

(England and Wales - Part L 2006)
Extensions 0.22,
renovation & repair work 0.25,
New build requirement could
range between 0.20 and 0.18

(Republic of Ireland-Technical
Guidance Document 2006 edition)
New Build & extensions 0.25

(Scotland, with boiler SEDBUK-Part J) 0.25

Solutions to minimise heat loss to ground

 Ground bearing floors

 Suspended floors   

 Under floor heating

 Concrete slab   

 Concrete and 
beam & block

 Timber joists

 

        Thermal Rockfloor     

 Thermal Rockfloor 

 Rockwool Flexi    

    Thermal Rockfloor     

 Thickness (mm)
(1000x600)
50, 60, 70,
80, 90, 100

 Thickness (mm)
(1000x600)
50, 60, 70,
80, 90, 100

 Thickness (mm)
(1200 x600)
50, 60, 75,
 90, 100, 140

(1200 x400)
50, 100

 Thickness (mm)
(1000x600)
50, 60, 70,
80, 90, 100


 

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