Working from the outside addresses water at the source. Understand the process, the disruption and the questions to ask, then connect with qualified Toronto professionals.
Reno Rise is an independent enquiry and matching service, not a contractor.
Photo: D Goug on Pexels. Stock photo, illustrative only. It is not a Reno Rise project.
How Reno Rise Works
Reno Rise helps Toronto homeowners plan basement renovations and legal secondary suites and connect with independent local renovation professionals.
1
Tell us about the project
Share your goals, your basement and your timeline using the enquiry form.
2
Reno Rise reviews the information
We look at what you have shared to understand the scope and what still needs to be confirmed.
3
We find the right contractor
Reno Rise matches your project with the contractor best suited to the work, and they take it from there.
What to expect
How Exterior Waterproofing Works
It is more disruptive than interior work because of the digging, but it keeps water away from the wall.
Excavation
The soil is dug away to expose the foundation wall down to the footing.
Wall repair
Cracks are repaired and the wall is cleaned and prepared.
Waterproofing membrane
A membrane and drainage board are applied to the exterior of the wall to keep water out.
Drainage
New or replaced weeping tile carries groundwater away, and grading is restored so water drains away from the house.
Access and site
Decks, patios, walkways, landscaping and neighbouring structures affect feasibility and cost.
Restoration
Backfill, grading and surface restoration finish the job.
Is Exterior Waterproofing the Right Fit?
It suits cases where water is pressing against the wall and access allows digging. If access is limited or the problem is a single crack, interior waterproofing or crack repair may be more practical. Ask any professional why exterior work is needed rather than a smaller fix, and how landscaping, patios or decks will be handled.
Exterior Waterproofing Timeline Expectations
Exterior waterproofing typically takes one to two weeks for a standard section of wall, depending on length, depth and how much needs to be removed and restored above ground.
Access, such as decks, patios, walkways or mature landscaping over the dig area, is usually the biggest schedule factor.
Weather affects excavation directly, since wet or frozen ground slows digging.
Weeping tile replacement alongside the membrane adds time versus membrane work alone.
Restoration (backfill, grading, hard surfaces, landscaping) is often the last visible step and can be underestimated.
Common Mistakes Homeowners Make
Because exterior waterproofing is disruptive and irreversible once buried, the mistakes here are costly to redo:
Agreeing to full exterior excavation without confirming a smaller interior or targeted fix would not do.
Not getting the restoration of decks, patios or landscaping written into the quote.
Skipping confirmation of what the membrane and drainage board warranty actually covers once backfilled.
Underestimating how access (fences, shared walls, narrow side yards) changes the real cost and timeline.
Not asking whether weeping tile will be replaced or only exposed and reused.
Permits and approvals
Excavation and drainage work can involve municipal requirements, and it may sit alongside structural work. Confirm with Toronto Building before starting.
Questions to ask a professional
Why is exterior work needed rather than a smaller fix?
How much will be excavated and how will landscaping, patios or decks be handled?
Will weeping tile be replaced, and where does it discharge?
What is warranted, and is the warranty transferable to a future owner?
“Amazing work and an outstanding crew. Very professional, energetic, and a pleasure to work with from start to finish. They communicate openly throughout the entire project, show up reliably, and get the job done right.”
RJReliance JanitorialCommercial client
“Saved my a$!. Butt lot outstanding service, affordable, and not to mention very quick to get ‘er done!!! They offer all sorts of services, mine was plumbing and they truly saved the day. My heroes. 10/10 would recommend.”
KBKaylyn BeattyHomeowner
Inspiration · Stock photography
Photos for Reference
Stock photos from Pexels, shown for reference only. They are not Reno Rise projects, and Reno Rise does not perform waterproofing.
Photo: D Goug on PexelsPhoto: Aksioart on PexelsPhoto: pppsdavid on Pexels
Frequently asked questions
Is exterior waterproofing better than interior?
They do different jobs. Exterior work addresses water at the wall; interior work manages water that reaches the foundation. The right choice depends on the cause and on access.
What is a waterproofing membrane?
A membrane is a waterproof layer applied to the outside of the foundation wall, often with drainage board, to keep water from reaching the wall.
How much does exterior waterproofing cost in Toronto?
It depends on the length and depth of wall, access, restoration, drainage and permits. Reno Rise does not publish prices. Get itemized quotes and compare what each includes.
Last reviewed September 2026. General planning information; confirm requirements for your property with Toronto Building and qualified professionals.
Basement assessment
Request a Basement Assessment
Tell us about your basement and your goals. Reno Rise reviews the details and matches your project with the contractor best suited to the work.
