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Conservatory upvc infill and solid roof

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19 Jun 2025
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My conservatory is about 3ft high walls then glass all around. A big piece of glass at the bottom, with a small on top, of which about 1/2 of the small ones are able to open.

The roof was replaced some years ago with a solid tile one and plastered ceiling, but it still gets massively warm in there or cold depending on the season.

To try and insulate it a little better I was planning on getting upvc infill panels to replace the main glass panels on both sides, keeping the top smaller glass panels. However I am conscious that all the weight of the solid roof is going into the windows and frames as there are no solid walls or extra supports holding it up except the back wall.

So a few questions:
Are the reinforced upvc infills as strong as the double glazed glass they are replacing?

Do they need to be as strong as glass if the roof is held to the main building across the back and by the front glass which isn't being replaced?

How big a job is replacing a glass panel? Is it something an inexperienced person can do alone or with another inexperienced person?

Will this actually help with fluctuating heat issues if a solid roof isn't working? The back gets the sun all day but the majority of the panes are blown which won't be helping.

Thanks
 
I am not an expert on glazing, but to my logical mind I doubt if a DG unit within a uPVC frame is actually taking any structural weight (load) as that would put the seal under strain and would fail causing fogging.

Come on guys, where's a glazing expert when we need one?
 
How do you expect uvpc panels to improve the situation?
Well a large proportion of the glass units have blown so I was under the impression that the panels will keep more heat out than a glass panel that has blown, keep the light out entirely in those areas thus providing shade, and probably be cheaper to get than a new glass unit of the same size.

But generally your question is my question. Will they improve the situation?
 
Well a large proportion of the glass units have blown so I was under the impression that the panels will keep more heat out than a glass panel that has blown, keep the light out entirely in those areas thus providing shade, and probably be cheaper to get than a new glass unit of the same size.

But generally your question is my question. Will they improve the situation?
No
 
Replace your faulty D/G units. Get some blinds that you can close in the summer. Install some heating for the Winter
 

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