Hello. I want to close one side of my conservatory. (I already have the building permit / planning permission). It is made of wood, and the frames contain double-glazed insulating glass units from 1985. I now want to remove the glass and close the opening with OSB boards on both the outside and the inside. Between them, I plan to install insulation and a vapor barrier. I would like to use rigid PUR (polyurethane) insulation boards.
My question is: How thick does the insulation need to be to provide equivalent or better performance than the glass units?
My question is: How thick does the insulation need to be to provide equivalent or better performance than the glass units?
Leaving the cladding in place is also an option. Energy efficiency isn’t ideal, but it’s inexpensive.
I would only add insulation on the outside, then a vapor-permeable underlay membrane over the insulation, followed by battens (3cm (1.2 inches)) for ventilation, and then the shingles on top.
On the inside, you can simply install an OSB board in front.
I would only add insulation on the outside, then a vapor-permeable underlay membrane over the insulation, followed by battens (3cm (1.2 inches)) for ventilation, and then the shingles on top.
On the inside, you can simply install an OSB board in front.
So, then the panes come out. I have 5-6 cm (2-2.5 inches) of space where I can add insulation and still have the OSB boards flush in front. So if I use 20 mm (0.8 inches) OSB board on the inside, then a vapor barrier, then 50-60 mm (2-2.5 inches) of insulation, then OSB again, followed by shingles or slate, that would be better than my current windows and I wouldn’t have to worry about mold or moisture. Is that correct?
Sorry for all the questions, I just want to avoid any unpleasant surprises later.
Oh, and one more thing I forgot: for the insulation itself, mineral wool or glass wool would be best, right?
Sorry for all the questions, I just want to avoid any unpleasant surprises later.
Oh, and one more thing I forgot: for the insulation itself, mineral wool or glass wool would be best, right?
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