nod 496 Posted December 6, 2018 We have built in block and block No Parge coat needed We have just had the airtightness test While our window design of sash throughout forced on us by planners was always going to let us down no leakage anywhere else Just a bit around the sash mechanism If you do the d&d properly there shouldn’t be any leakage around walls and cielings Share this post Link to post Share on other sites
