Ceiling stain under an upstairs bathroom in Nepean, who do I call first?

A stain on a ceiling below a bathroom means water got there at some point. Before anyone touches the drywall, the source has to be found and stopped, because patching over an active leak just puts new board in the same situation.

The first call is to a plumber, not a drywall contractor. If the stain is dry, firm to the touch and not growing, the leak may have already stopped on its own, but a plumber can confirm that. If the drywall is soft, sagging or the stain is spreading, leave the area below and get a plumber in quickly. A ceiling holding water can give way without warning.

Once a plumber has confirmed the source is fixed, the next question is how far the water spread. A drywall contractor has to open the ceiling to see what the framing and insulation look like before quoting the repair. If there is any sign of mould, that is abatement work first; ottawaabatement.com covers that side of it. If the insulation is wet and needs to come out, ottawainsulationcontractors.ca is the right starting point for that piece.

On the drywall side, we found too few published prices for water-damaged ceiling repairs to give a reliable range. The scope varies too much depending on how much board comes out, what the framing looks like once it is open, the finish level needed to match the rest of the ceiling, and whether texture matching is part of the job. Ask the drywall contractor to quote in writing with the board area, the finish level, whether primer and paint are included, and what happens if more damage is found once the ceiling is open.

If the house was built before 1990, Health Canada advises testing before anyone cuts or sands the existing ceiling material; a positive result means abatement work before the drywall repair begins.

When you have a quote in hand, ask the contractor to put the warranty terms in writing: what the repair covers, how long it runs, and whether it would transfer if you sold the house.