That is all really nicely but What exactly are secondary glazing models I listen to you question! Effectively over a essential amount its a window inside a window. To address this, You can utilize self-adhesive brush seals, including the Moroday 6 x 7mm x 5m Black MWS8, that may be https://franciscopiync.blogsvirals.com/34584259/sash-window-draught-proofing-an-overview