What bathroom tasks should never be DIY?

Several bathroom renovation tasks are either legally restricted or extremely dangerous for DIY work in Ontario, and should always be handled by licensed professionals.

Electrical work tops the list of tasks you should never attempt yourself. In Ontario, any electrical work beyond basic fixture replacement requires a licensed electrician and ESA (Electrical Safety Authority) permits. This includes installing new circuits for heated floors, exhaust fans, GFCI outlets, or any wiring modifications. The combination of electricity and water in bathrooms creates serious electrocution risks, and improper electrical work can cause fires or void your home insurance. Even something as simple as moving a light switch requires proper permits and inspection.

Plumbing modifications are another area where DIY work can create expensive disasters. While you might legally be able to replace a toilet or faucet, any work involving moving pipes, installing new supply lines, or modifying drain systems should be left to licensed plumbers. Ottawa's older homes often have unique plumbing configurations, and improper connections can lead to flooding, sewer backups, or water damage that costs thousands to repair. Additionally, major plumbing work may require City of Ottawa permits and inspections.

Structural modifications are absolutely off-limits for DIY work. This includes removing any walls (even if you think they're not load-bearing), modifying floor joists for new plumbing, or cutting into structural elements. What appears to be a simple non-load-bearing wall might actually be supporting the floor above or containing crucial utilities. Structural work requires engineering assessments and building permits, and mistakes can compromise your home's safety and value.

Gas line work is strictly prohibited for homeowners and must be performed by TSSA-licensed technicians. This applies to any gas-powered ventilation systems or if you're converting from electric to gas fixtures. Gas leaks can be fatal, and only certified professionals have the training and tools to work safely with gas lines.

Waterproofing and moisture barriers in shower areas require specific expertise to prevent mold and water damage. Improper waterproofing behind tiles or in shower niches can lead to structural damage that's expensive to repair and may not be covered by insurance if done incorrectly.

For complex bathroom renovations involving multiple trades, it's worth getting a free consultation from experienced contractors like Justyn Rook Contracting, who can coordinate all the licensed professionals and ensure proper permits are obtained for your Ottawa renovation project.