0

I am about to mount a 15 lbs projector ( x3000i ) on my ceiling. None of my ceiling joist is at dead center so I drilled a 0.5 inch plywood ( 30inch x 20inch ) between two joists.

Now can I mount this projector on this 0.5 inch plywood + drywall? Projector mount came with long washer head screw and the manual says to drill 2.5 inch deep with 5/32 drill bit. Can I just drill this screw even though I don't even have 2.5inch thick wood in between? Or do I need to use some kind of anchor?

Washer head screw: Washer head screw

Ceiling with plywood: Ceiling with plywood

1
  • @Ruskes that's only if the screw happens to hit a joist. Really, the screw only needs to be about 3/4" longer than the thickness of the projector mount (1/2" ply, 1/4" to account for the screw taper).
    – Huesmann
    May 10, 2023 at 12:35

1 Answer 1

5

That screw will work but is unnecessarily long and fat. You'll have to predrill and hope you don't encounter anything inside the ceiling. You seem to have a sprinkler head there, so you especially hope not to hit its supply. I also wonder whether the thread on your screw is too coarse for a 1/2 inch board making it potentially weaker than a more appropriate one... not sure.

Assuming the projector mount uses four screws and a fairly thin piece of sheet metal (thin enough you don't need to account for it in the screw length) I would use a #8 x 1 inch (or whatever reasonable length you have a box of) without even drilling. It'll take you 3 minutes. The screws will fully engage the plywood and won't exit the drywall.

4
  • 2
    Perfect answer. I would also suggest: Before screwing the projector in place, give the plywood a quick coat of white paint. Let it dry, then screw in the projector. With white paint, even if it is not a perfect match to the rest of the ceiling, the plywood will not look out of place as it does now. May 9, 2023 at 19:34
  • 1
    yes, unless you have some spare paint that matches the ceiling use white paint or paint that matches the projector or projector bracket. or get a "test pot" that fully matches, it should have just enough.
    – Jasen
    May 10, 2023 at 2:49
  • OP could even get some molding and frame out the edges of the plywood piece, for a more "finished" look.
    – Huesmann
    May 10, 2023 at 12:37
  • I will white paint it. My projector x3000i is also white. May 11, 2023 at 6:01

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.