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Thickness of exterior walls

kelbal · 2020-08-16 14:41:38

Hi. I'm just trying to measure out an extension we're thinking of getting done, and we're trying to figure out what the interior space would be at the end of it being done. I know modern building standards mean a lot more insulation on walls than would have been done in the past. For a standard exterior wall, what will the…

16-08-2020 2:41pm

#1

kelbal

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Hi. I'm just trying to measure out an extension we're thinking of getting done, and we're trying to figure out what the interior space would be at the end of it being done. I know modern building standards mean a lot more insulation on walls than would have been done in the past. For a standard exterior wall, what will the overall thickness be from outside to inside, by the time insulation & plastering is applied?
Thanks

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#2 16-08-2020 3:11pm

Gumbo

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I would assume 350mm

100mm outer leaf
150mm full fill cavity insulation
100mm inner leaf

1