what is Ontario residential code for ceiling drywall thickness (painted surface)

9/19/2017 at 4:05:50 PM

For residential homes it's 1/2 drywall, condos could be 1/2 or 5/8 depending on framing and what's requested as per plan.

9/19/2017 at 4:06:31 PM

If the ceiling needs to be fire rating,then 5/8 drywall is required and resilient channels,if that is not the case then 1/2 drywall is fine.

9/20/2017 at 10:56:51 AM

Unless you have a suite in the home, I do not believe the ceiling board is actually for "fire code" but more for rigidity and being able to span the distance between ceiling joists. So 5/8 for 24 " joist spacing and 1/2 fireguard ( once again, not for the fire rating but for rigidity) for 16" on center. I would never recommend regular drywall for any ceiling application, especially if the ceilings are being sprayed.

If there is a residential suite involved, then there are more regulations

Not sure if that is the actual code, but that is recommended in my circles, and what I would do in my own home.

http://www.georgianbayacoustic.ca/

9/21/2017 at 6:58:16 PM

This can vary from 1/2 inch to 1 or 2 layers of 5/8 fireguard depending on single family dwelling or multi family. usually you can phone the city and find out