Draughtproofing behind kingspan and skirting board and wall?
I was going to use my old skirting boards in front of the new kingspan insulation but I've noticed that behind where the skirting boards was is a gap which goes down behind the floorboards and a draught whistles up it from downstairs...
Should I somehow seal the gap with some plastic so the draught cant go up behind the kingspan, or use doublesided sticky tape or what to stop the draught?
picture is at
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