ᐅ Recessed Ceiling Spotlights in Thin Concrete Slab – Drilling?

Created on: 3 Mar 2016 11:49
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Scratchi
Hello!

We have just started the groundworks, and I am currently in the middle of planning our ceiling spotlights. These should fully illuminate the living, dining, and kitchen area. We plan to attach KG caps to the precast concrete ceiling and lay the cables directly through conduits before having the concrete poured. We will handle drilling through the precast ceiling ourselves later on.

Now the question is how to arrange the spotlights. We are a bit uncertain about this. Our current idea is shown in the drawing! Is this sufficient? Which type of spotlights would be best to achieve an even, full illumination?

Open floor plan: living/dining/kitchen area with entrances, corridors, stairs, dimensions.
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torsan
4 Mar 2016 10:37
Well, nothing has changed in the fixed price.

However, I would have paid for that as well. The recessed lights look cool, and I hate hanging lamps. But everyone has their own preference.

Cheers, torsan
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Sebastian79
4 Mar 2016 10:38
As few ceiling lights as possible
Jochen1044 Mar 2016 14:16
We also have 59 of those. Of those, 35 are located in the drywall ceiling above. There is practically no additional effort there.
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Vitalio
4 Mar 2016 15:32
@Mycraft

I never said my solution was the best, but if you’re going to work with PVC sewer pipes, please do it properly. With my approach, I saved around 700-800 € (about 740-850 USD), but I also own a core drilling machine. The structural engineer calculated the ceiling structure to accommodate ventilation ducts, recessed lights, and electrical wiring. From below, you can’t see the junction boxes either, as the ceiling was skim-coated twice and painted.

I would also recommend having the boxes installed at the factory if you don’t have the proper tools.
Mycraft5 Mar 2016 08:37
Vitalio schrieb:
I never said my solution was the best

Ah yes... but the following sentence suggests exactly that... and the average home builder will follow your advice and end up with unnecessary problems...
Vitalio schrieb:
if you do it with KG, then please do it properly.

It is definitely not right to chisel out and drill large areas in the new, smooth precast concrete slab...

So either have the boxes installed beforehand or keep the holes as small as possible, but please no 125mm (5 inches)... and definitely no chiseling!
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Vitalio
5 Mar 2016 19:19
Then explain to me the difference between a 70mm (2.8 inches) and 125mm (5 inches) hole in the ceiling when you cut through reinforcing bars.
And the area around the staircase (ground floor hallway) contains a lot of rebar.