The current ceiling height is approximately 2500 mm. Planning to lower it to install recessed LED downlights. The lowering should be a maximum of 100 mm. So the finished ceiling height will be about 2400 mm.
The area to be lowered is roughly 50 sqm. There will be a uniform lowering in the bathroom, hall, kitchen, and living room. I haven't planned to lower the ceiling in the two bedrooms.
Now to my considerations:
- framework, wood or steel?
- c/c distance, 300 or 600?
- size of the framework, 45 or 70?
- framework attachment, ceiling or wall?
Two important conditions: What is on the ceiling today? and What surface finish do you want the lowered ceiling to have? I assume you are not interested in suspended ceilings in modular systems?
If you want to minimize the lowering, there are nice downlights that require an installation depth of 28 mm, which is perfect if you are installing with 28x70 mm battens. But whether it is applicable depends, of course, on what Justus has asked.
There is a lamp in the ceiling
Jokes aside, the ceiling is solid reinforced concrete 200 mm. The walls are the same.
For the surface, I'm thinking of using regular gypsum boards so that the painted surface is smooth and nice.
The electrician wanted to see a reduction of at least 100 mm. But I am content with the smallest reduction. Found downlights that require 35 mm + 13 mm gypsum = 48 mm
28 mm spacing is sufficient for them. Approximately 500 SEK each including VAT. You can also fit regular ceiling boxes if you want regular outlets as well (I recommend having both, both to vary the lighting and because it's good to have a junction point in the ceiling).
Do you know what is behind the desire for a 100 mm drop? Some old fox thinking warm halogen, or is there other equipment that needs to be installed?
300 mm between the spacings is customary to achieve negligible sag with a standard 13 mm gypsum board. I would have installed the spacings with nail plugs in the ceiling.
Old fox thinking of halogen, so one understands that. But not relevant in my case as I choose to go with LED instead. Nothing except the lighting should go under the roof.
There will be quite a large span if you look at the floor plan, but maybe it doesn't matter in my case?
You mount the glesen in the ceiling, don't dare to say how close it needs to be with spikplugg but when I have mounted gles in an existing wooden ceiling, I have used double wood screws every meter approximately, maybe a little closer mostly because it's fun to screw
With the combination of a concrete roof and plaster in the ceiling, I think a wooden structure is quite a given. There are plenty of fastening points and the plaster needs to be mounted against something solid. For the plaster, a c/c 600 between the studs is probably sufficient.
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