Jimbo37 Posted March 21, 2023 Share Posted March 21, 2023 Hi Can I put mineral wool between solid joists on a flat roof - see red on the graphic. TIA Link to comment Share on other sites More sharing options...
Mr Punter Posted March 21, 2023 Share Posted March 21, 2023 Often you can but it is worth doing a condensation risk analysis. 1 Link to comment Share on other sites More sharing options...
Dave Jones Posted March 21, 2023 Share Posted March 21, 2023 as long as you have a proper VCL under the kingspan and sealed down onto the internal wall it will be fine. 1 Link to comment Share on other sites More sharing options...
ADLIan Posted March 21, 2023 Share Posted March 21, 2023 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. 1 Link to comment Share on other sites More sharing options...
Jimbo37 Posted March 21, 2023 Author Share Posted March 21, 2023 @ADLIan Is condensation the concern (presumably between the wool & board above)? @Dave Jones @Mr Punter thanks Link to comment Share on other sites More sharing options...
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