ᐅ Installing Recessed Downlights in a Cast-In-Place Concrete Ceiling Without Plastering

Created on: 17 Jan 2018 06:45
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koettel89
Good morning everyone,

what is the best way to install spotlights in a ceiling if I don’t want to modify or plaster the cast-in-place concrete afterwards? We want to keep the concrete visible in the hallway on the ground floor to maintain the rustic charm.

I was thinking about using the Kaiser concrete slab ceiling large junction box. Fix it to the formwork boards with nails, pull the cables through, and that’s it. The spotlight to be installed should fit inside and the frame should cover the box.

Regards, Daniel
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Steven
17 Jan 2018 17:56
Hello

I remove the outer tabs. I use the two internal provisions for the screws, at 2 o’clock and 8 o’clock.

Steven
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koettel89
18 Jan 2018 06:23
Good morning,
that looks really good.
Thank you very much
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koettel89
3 Apr 2018 19:23
Good evening. When installing the junction boxes, how large should the trim of the recessed spotlights be? The edge of the box looks quite thick.
Regards
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Wickie
4 Apr 2018 16:21
What are the installation dimensions of the light fixture? Or, what is the internal diameter of the housing you want to use?
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toxicmolotof
4 Apr 2018 21:29
I don't think you can make it look that good without plastering (or did I misunderstand?).
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Wickie
5 Apr 2018 07:54
It is definitely doable, but it can be a bit tricky. Electricians dislike cast-in-place concrete boxes, while architects love them 😀
We deliberately decided against using them because, unfortunately, I often see what it looks like when it’s done poorly!

But: when done well, it looks fantastic!