Hi Guys looking for some info/help here, just finishing up a self build and the insulation spec was 120mm PIR inside the kit with 25mm PIR over the kit with all joints tape, but we’ve noticed during windy days we’ve wind coming through all outlets on external walls, the outside of the house is concrete blocks which haven’t been scratched yet or rendered, would it be possible that the wind is coming in through the expansion joints/around windows,sills and doors that haven’t been sealed and getting through the kit? We put the 120mm in as tight as we could and any small gaps were fill with expanding foam. Any help appreciated guys thanks