renewing 25% of a thermal element regs

Joined
5 Jan 2011
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Location
Sheffield
Country
United Kingdom
Hi All,

Just a quick query about this 25% rule around thermal elements. Is it 25% of thermal elements (e.g. plaster on external walls, or ground floor floors) across the whole house, or in a room, or what?

I had assumed it was 25% of any given section, but have just read something that suggests it is 25% of the whole house. The latter would mean I have nothing to worry about (though will still be whacking insuilation in anywhere I can find to easily do it!).

Cheers

DM
 
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