Basement Pros › Guides
Ontario · 17 guides
Basement and foundation guides
What the work costs, how each method works, and what to ask before you hire. Each guide links to the ranked companies in the towns it covers.
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Mold on Basement Walls: Causes, Cleanup and Next Steps
Found mold on basement walls? Learn how to tell condensation from a leak, what to do with concrete vs drywall, and the order to fix it in Ontario. -
Dehumidifier for Basement Mold: Size, RH and Limits
How to pick a dehumidifier for basement mold: target humidity, sizing, drain or bucket, and the point where you need a mold removal company in Toronto. -
Basement Mold Removal Cost in Ontario
Basement mold removal in Ontario often costs a few thousand dollars, more with containment, testing and water repairs. See what drives the price. -
Black Mold in Basement: What It Is and When to Hire Help
Black mold in a basement is usually dark mould on damp drywall or wood. Health Canada says to hire a professional above 1 m2. Here is what to do next. -
How to Get Rid of Mold Smell in a Basement
Find the moisture source, hold humidity at 30 to 50%, and check for hidden mold behind finished walls. Here is how to get rid of mold smell in basement spaces. -
White Mold in Basement: Mold or Efflorescence?
White mold in a basement, or efflorescence? A simple water and vinegar test helps tell them apart and shows what each one means for your wall. -
Basement Waterproofing Paint: Does It Work?
Basement waterproofing paint can slow damp and seepage, but it cannot stop water pushing through a wall. Learn when it helps and when to call a pro. -
Waterproofing a Basement Floor: Slab vs Cove Joint Leaks
Learn why water reaches a basement floor, how slab leaks differ from cove joint leaks, and which fixes work in Toronto, with typical cost ranges. -
Waterproofing Basement Walls From Inside: What Works
Waterproofing basement walls from inside works for seepage and joint leaks. Coatings alone rarely hold. Here is when interior drainage is enough. -
Basement Waterproofing Membrane: Types and What Works
A basement waterproofing membrane only works if it is a continuous, bonded barrier. Compare rubberized asphalt, sheet, liquid and dimple board. -
Interior Basement Waterproofing: Drain Tile and Sump Guide
Interior basement waterproofing uses drain tile and a sump pump to collect water under the slab. See how it works, its limits and the demolition cost. -
Exterior Basement Waterproofing: The Process Step by Step
Exterior basement waterproofing means digging out the foundation, sealing the wall, adding drainage and backfilling. See each step and the yard impact. -
Foundation Crack Repair Kits: Do They Work?
Foundation crack repair kits can work on dry, stable hairline cracks. They usually fail on active leaks and moving cracks. Learn when to use one or call a pro. -
How to Fix a Crack in Foundation: DIY or Call a Pro
How to fix a crack in foundation walls: a homeowner can seal dry, stable hairline cracks. Wet, wide, horizontal or growing cracks need a contractor or engineer. -
Interior vs Exterior Basement Waterproofing
Interior systems manage water after it enters. Exterior systems stop it at the wall. Compare cost, disruption and access limits for Toronto homes. -
Foundation Crack Repair Cost in Ontario (2026)
Foundation crack repair cost by method: injection, carbon fibre, and excavation, for Toronto, Vaughan, and Ottawa. What raises the price. -
Basement Waterproofing Cost in Ontario: 2026 Ranges
Basement waterproofing cost in Ontario: crack injection from about $500, interior drain tile $50 to $100+ per foot, exterior membrane $100 to $350 per foot.