Just wondering if anyone here has any experience of this? Thinking about a possible loft conversion on a single-storey open-plan bungalow, I wondered about opening up the entire (or almost the entire) space to the underside of the roof and installing a mezzanine-type gallery.
Any thoughts, incredulous comments, bemused reactions and general advice will be very welcome.
I thought about that, of course. But is there essentially any difference between heating a large double-height open plan space and heating two large single-height spaces separated by a ceiling/floor with a stairwell opening? Because the latter is plan B, so to speak.
Well for a start all the heat will be at the top and not contributing to your comfort unless you are extremely tall :) I partially overcame this issue in a tall commercial unit once with a downdraught fan - but not very pleasant in a domestic situation
Sounds a lovely idea. Two immediate thoughts spring to mind.
1) Structure integrity. No doubt you have been , or will be, considering this carefully.
2) Heating. you will have a deal of lost space that is expensive to heat. Can't remember the name but a vertical tube ceiling>floor with fan assistance might be of benefit.
Could look good at that. Sketching out ideas tonight has thrown up some some interesting points: ceiling lights for the areas with no ceiling will presumably have to be dropped on long wires from the roof or suspended from transverse cables; two Velux windows which would be perfectly workable in the plan B preserve-the-ceilings scheme (since they could be reached from the upper-story floor) would have to be remotely operatable; cabling which currently crosses the lower rooms in the loft space needs fairly major rerouting, and so on.
The weight of the roof makes the bottom of it tend to spread out, pushing the walls out. The rafters prevent that. Unless you feel a desperate need to get rid of them, I would retain the rafters, or at least every other one, with suitable beefing-up. Where you have a mezzanine floor, that won't be a problem anyway.
The rafters then provide a place to put the ceiling lights.
Won't it make the whole house less insulated and thus hotter in the summer and colder in the winter, and there is more space to heat as well of course. Brian
You can buy Zalman quiet fans, which this uses, from computer component suppliers so you could probably make your own.There are plenty of pictures on the heatstick website to show you how to do it.
Because I like the unclaustraphobic open-plan feel I've already achieved on the existing ground floor and want to retain it for any new rooms formed in the loft. Because it would be a visually striking and unusual thing to try. Because I want to see if it would work.
I don't see how. At the moment, the loft is boarded and accessed by a space-saver staircase through a permanent opening, so the whole bungalow is effectively one space anyway. And there's 25mm of Celotex between the rafters which would certainly be upgraded with a full conversion. If I do this, the place will be more insulated than at present, not less.
I accept that opening up to the rafters will make the house *feel* bigger even if it actually isn't, but feeling bigger and more open is exactly the effect I'm after.
Forgive me if I'm misunderstanding you but I think we're talking about joists, aren't we? And I take your point, but can't help thinking that the whole open-plan idea will look compromised if some are retained: the effect might well be that things are unfinished, waiting for the ceiling to go in.
Yes, I meant joists, but I thought you were the one talking about rafters, so I just followed suit? Anyway, we meant the same thing. Basically, you need to join the two sides of the house, or the A-shaped roof will tend to push them apart.
How you do that is up to you, or your structural engineer, and as you say you need to get the aesthetics right. Possibly, you can replace the joists with steel cables?
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