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External Walls
(Thermal)

                                                     


 Prescribed U Value W/m2K

(England and Wales - Part L 2006)
Extensions 0.30,
renovation & repair work 0.35,
New build requirement could
range between 0.28 and 0.25

(Republic of Ireland-Technical
Guidance Document 2006 edition) 0.27

(Scotland, with boiler SEDBUK-Part J) 0.36

Solutions to minimise heat loss through the roof

 Full fill

 Partial fill

 Timber frame
 (Tile hanging)

 Rockwool Cavity
(Built in)

 Energysaver
(Blown/retrofit)

 HP Partial Fill 

 Rockwool Flexi

 Thickness mm)
(1200x455) 50, 65, 80,
 90, 100, 110, 120
 

 (By specialist installers)

 Thickness (mm)
(1200x455)
40, 50, 60,
 65, 70, 80,
 90, 100

 Thickness (mm)
(1200x600)
50, 60, 70,
90, 100,
120, 140

(1200x400)
50, 60, 100,
120, 140

 

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