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Reckon your plan makes sense.
We had a load of rigid PIR insulation of various thicknesses left over from our work so I laid that directly onto the joists in the parts of the loft I would have boarded. Fluffy knauff in the eves and everywhere else. You’d have to do the maths to see if it’s cheaper or the same as fluff, boards, loft legs and your time. It’s certainly quicker.
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Was probably used as a model train space. We had something similar but from what I can tell it was model tanks.
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the middle part being insulated and boarded over is not good for the rafters.
There should be ventilation between the insulation and the roof - I think that's the biggest worry you have there.
Other than that, and carpet on the walls, it seems reasonable enough.
Moar insulation in the eaves is good, though, but remember to leave the soffits unblocked.
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Sure you want to pull down those stud walls?
Presumably they are supporting your rafters, tiles etc… they are far from ideal as they are (also presumably) transferring the load of your roof to the middle (weakest point) of your 1st floor ceiling joists.
But if your roof is still vaguely triangular then they are getting away with it.
If you take them out and there are no other visible means of support for your roof then it may well stop being triangular quite soon.
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@Pantsmaster
After much procrastination, cold weather has made me want to finally sort my loft out. I haven’t really been up there since I got the house, but looking now and it looks like the previous owner has done something….weird.
Picture attached shows the general idea. Yellow is insulation beneath chipboard floor boards. It’s pink fibrous stuff, and stuffed between joists so probably 100mm or less.
Pink lines are the weird bit. He’s built a stud wall and it looks like the same pink insulation is in there behind plasterboard. On the roof, it looks like that insulation has been put between the rafters then boarded over with plasterboard. Then the whole lot (roof and walls) covered in carpet underlay (?!).
The ventilation in the side bits is good, but I’m guessing the middle part being insulated and boarded over is not good for the rafters.
I’m guessing my best option is:
I’m wondering if I should pull the stud walls down too.
I’m guessing it’s not really possible to avoid pulling down the stuff on the rafters?
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