Residential Sewage Backup Restoration

When sewage backs up into your home, you are not dealing with a flood, you are dealing with a biohazard inside the space where your family lives, sleeps, and breathes.

Firstline has spent 20 years restoring homes across Toronto and the GTA after sewage backups, basement floods, and water damage. We are fully licensed and insured, WSIB covered, and 5-star rated on Google. We don't just clean up and leave, we extract, decontaminate, dry, and rebuild your home to pre-loss condition or better, as one accountable team.

Sewage backup is classed as black water, the most dangerous category of water damage. It is grossly contaminated and carries pathogens that are a real health risk to everyone in your household, especially children, seniors, and anyone with a weakened immune system.

• It carries E. coli and other bacteria that cause serious gastrointestinal illness.
• It carries viruses and parasites that spread through contact with contaminated surfaces or air.
• The materials it soaks into, drywall, carpet, insulation, cannot be disinfected clean and must be removed, not salvaged.

This is exactly why you don't wade in with a shop vac and a bottle of bleach. Call Firstline and keep your family out of the affected area until it's contained.

In most homes, sewage backups surface in the basement, it sits at the lowest point and is connected to the drains and sump system. A municipal sewer surcharge during heavy rain, a blocked main line, or a failed sump pump can all push wastewater up through floor drains and into your lower level.

The basement is also where families keep finished living space, bedrooms, storage, and the furnace and laundry. That means a backup doesn't just damage a utility room, it threatens belongings, finished rooms, and the mechanical systems your home depends on. We treat the whole picture, not just the puddle.

A sewage backup is the one home emergency you should never DIY. Without proper PPE, containment, and disinfection, you expose yourself and your household to the very pathogens you're trying to clean, and you track them through the rest of the house on your shoes and clothing.

The cheap option is just as risky. A budget crew that fans-and-mops the surface and leaves the contaminated drywall and carpet in place may look done, but the contamination and moisture are still there. Within 24 to 48 hours mould takes hold, and you're left with a hidden health problem on top of the original one. Doing it right the first time is the cheaper path.