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Airhead has covered it better, but when we looked it didn’t seem like a practical conversion because of the many complications.
And then there’s the fact that sliding sash aren’t the most efficient design in the first place - so it can be really hard to service old units to the point that they’re effective (and on top of that it’s hard to find someone with the skills who’s willing to do it).We ended up with PVC sliding sash at a cost of around 7.5k because we weren’t planning on staying on the flat long enough to justify the 15-20k new wood ones would cost. The downstairs neighbours had theirs retrofitted with double glazing, I’m not sure what the cost was, but I wouldn’t have been happy with the result if it was my flat.
Nef
Anyone had their old single glazed sash windows converted to double glazing (just changing the glass and retaining the nice original wood frame for maximum OG forum points). Worth it?
Thinking better insulation and reducing road noise.