secondary glazing

I have some wooden sash windows at the front of my property, single pane of glass, no double glazing. You can see an example of one here: They used to have separate secondary glazing (fitted in the 90s) but it looked awful and made cleaning the windows very difficult. Its a listed building so...

We’ve just bought a 1930’s semi which is double glazed, but by the looks of things some older aluminium secondary glazing remains. We’re going to take that out, but what are these blocks with holes in between the double and secondary glazing? I assume some sort of thermal bridging? Thanks in...

Does anybody have a cheap method for getting these large, old, draughty crittall windows secondary glazed? There are 9 of these windows. I have bought 9 huge 4mm plexiglass sheets that are big enough to sit on the wall covering the whole thing. The windows are 1500x1200. I thought about using...

My wife and I recently moved into a grade II listed cottage, which has timber casement windows, with secondary glazing attached to each glass pane internally. When we moved in, the majority of the windows had been neglected for 15-20 years - all mouldy and black. I have recently embarked on a...