Corry Posted February 27, 2021 Share Posted February 27, 2021 Hi - Looking for some help. Our dormer window bedroom is cold with the walls in the pics being very cold. After removing the plasterboard, this is what is behind. A mixture of loft insulation stuffed into the RSJ and Kingspan. Should I use expanding foam in the small gaps you can see or just tape them up? Will doing this make a difference to the room temp? Does this insulation meet building standards? Cheers. Link to comment Share on other sites More sharing options...
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