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Warm flat roof insulation boost

Jimbo37
in Heat Insulation

Featured Replies

Hi :)

Can I put mineral wool between solid joists on a flat roof - see red on the graphic. TIA

image.png.18239a7dd33530584a8d2cf489970e58.png

as long as you have a proper VCL under the kingspan and sealed down onto the internal wall it will be fine.

    • Like 1

    Don’t do it!! Frowned upon by BS6229 & BS5250 and doubt insulation manufacturer would support it without lots of caveats. On your head be it.

    • Like 1

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