[Closed] Insulate a green house?!

I suppose the big question is why?
I have heard of adding a layer of bubble wrap to give some insulation but let light in or using horticultural fleece and / or bubble wrap on delicate plants to protect from frost.
Other insulation tends to exclude light which turn the greenhouse into a shed, unless this is the intention?
Does this help?

Why - Good question. It’s not actually a plant inhabited green house. It’s an aluminium structure covering outside “living” space.

Presuming its unheated, I think any insulation may also reduce solar gain when the winter sun comes out. So it would be evenly cold through the day rather than a bit warmer at midday and a bit colder at night?

Clear plastic sheet will provide no (or very little) insulation.

My conservatory is double-glazed and has 5 layer plastic sheeting on the roof and it's still bloody freezing with no heat on.

You'd have to line it with Kingspan insulation board or something like that.

If it's made of the sections that would be used for an aluminum conservatory then you might be able to retrofit a lightweight roof as don in conservatory to sum room conversions that you see advertised.

To make it a more 'liveable' space, it might be simpler to knock down and rebuild in timber is a similar style to the numerous garden office, uber shed project threads on here.

If it's a temporary can I reduce drafts and get a degree warmer to make this winter bearable the some of that shrink film secondary glazing that I remember friends using in single glazed rented house will help. An old duvet taped to the underside of the roof could improve matters for this type of thing.

Hope this helps with ideas.

Thanks all that’s some helpful suggestions. Although full rebuild the most effective but it’s quite big 20ft x 40ft ish.

It is in identical cross sections I guess each about 2ft wide.

Sounds like reducing the ‘glass’ is the way to go albeit will reduce the heat in the summer which in reality can get too high anyway.