Question 1

Hole left by an old light fixture in a Kanata ceiling, who patches it?

Accepted Answer

A drywall contractor patches the ceiling. If wiring is still in the box, removing or capping it is electrical work: electrician is a compulsory trade in Ontario. Published Toronto and Ontario contractor prices for a small patch run about $150 to $600, though a ceiling hole left by a fixture box may fall outside that range depending on its size, so ask for a written quote once a contractor has seen it. These are published prices read October 1, 2026, not Ottawa prices.

Question 2

What screw spacing does the Code want for an Ottawa drywall ceiling?

Accepted Answer

Ontario's Building Code sets the ceiling screw spacing at not more than 300 mm on centre (clause 9.29.5.9). That applies to a single layer of gypsum board on wood framing or furring, fixed with screws. These are minimums for new work, and you should ask the City of Ottawa's Building Code Services how they apply to your specific renovation. A few details from the same clause matter for ceilings.

Question 3

Does replacing a ceiling joist under drywall in Ottawa need a permit?

Accepted Answer

Replacing a ceiling joist falls under structural repair, and the City of Ottawa's permit list includes "structural repairs or alterations" as work that requires a building permit. Get it before the work starts.

Question 4

Is a stained ceiling in Riverside South a drywall or a roofing job?

Accepted Answer

A stained ceiling means water got there, so the first job belongs to whoever deals with the source: the roof, the attic or the plumbing above. Drywall work comes once the source is found and stopped. Note where the stain sits, roughly how big it is and when you first saw it; the person tracing the source and the drywall contractor will both ask. Once it is, the drywall side can range from re-taping and finishing a small area to cutting out and replacing board.

Ceiling Repairs

Hole left by an old light fixture in a Kanata ceiling, who patches it?

What screw spacing does the Code want for an Ottawa drywall ceiling?

Does replacing a ceiling joist under drywall in Ottawa need a permit?

Is a stained ceiling in Riverside South a drywall or a roofing job?