Toronto, Ontario · Basement water-entry planning
Start with the first visible wet point and when it appears. Then match the water pathway to the foundation, drainage, exterior access and repair boundary—before choosing interior or exterior waterproofing.
Interactive water-path cutaway
Select the closest observation. The cutaway highlights questions to prepare—it does not diagnose concealed conditions.
ENTRY / 01Water around a basement window or well
Record water level in the well, nearby downspouts, grade, window frame and any wall crack. A cover can reduce direct rain and debris, but it cannot correct every wall or drain pathway.
Open the window-water assessment pageA better first question
Toronto waterproofing services
Each page states the evidence to prepare, the decisions that change scope and the work that may require a separate qualified trade.
Toronto basement waterproofing
a Toronto basement leak
exterior foundation waterproofing
interior basement waterproofing
foundation crack repair
weeping tile repair or replacement
Observed conditions
Start with the closest condition, then keep foundation water separate from condensation, supply or drain leaks and sewer backup until evidence connects them.
See all basement-water problems
The DryLayer assessment route
Timing, weather, first visible point, spread, sump and drain behaviour.
Surface delivery, window, crack, wall, joint, footing drainage, plumbing or sewer.
Poured, block or stone; finished rooms, depth, utilities and excavation route.
Wall length, components, destination, permits, protection, restoration and exclusions.
Foundation + drainage library
Compare foundation construction and water-management components before applying a single product answer.
Assess cracks, form-tie points, joints and wall-floor entry in poured concrete before choosing injection, exterior or drainage work.
SY-02Trace water through joints, hollow cores and the wall base before selecting an interior or exterior block-foundation system.
SY-03Respect irregular masonry, mortar, wall thickness and moisture movement when assessing older Toronto stone foundations.
SY-04Define wall preparation, crack treatment, membrane continuity, protection and drainage to the footing before comparing products.
SY-05Map wall collection, perimeter channel, under-slab route and sump destination around real basement obstacles.
SY-06Understand footing-drain purpose, age, connections and evidence before recommending repair, replacement or an interior alternative.
Toronto flood-protection planning
Toronto expanded its Basement Flooding Protection Subsidy Program on May 1, 2026. Eligible work performed on or after November 12, 2025 may qualify for up to $6,650 per property, subject to current categories, contractor, permit, inspection, invoice and application conditions. The City decides eligibility.
Official links reviewed September 2026. Requirements can change.
Decision guides
Interior and exterior basement waterproofing solve different boundaries. Compare water pathway, foundation, access, drainage destination, disruption and restoration before choosing a Toronto system.
Read guide
Heavy rain can expose roof-water, surface, foundation, footing-drain, sump and sewer pathways. Learn how timing and the first visible entry point shape a Toronto basement assessment.
Read guide
Basement waterproofing costs depend on more than linear footage. Learn how excavation access, depth, foundation, interior finishes, drainage, permits and restoration shape a Toronto scope.
Read guideBegin with observable evidence
Send the Toronto postal code, first visible water location, weather timing, basement finish, pump or drain observations and exterior access.
Request a water-entry assessment