Bogart said:Been suggested to use foam but I thought that was only used by the PVC DG boys?
Craig89 said:All my new sash windows are fixed in with the adhesive low expansion foam and they are solid. I don't see the problem with it, a mechanical fixing would be better yes but not always easy with sash windows so mine are wedged and foamed
Bogart said:Was not too sure how things like foam etc adhered to clay lump.