Groundwater finds every crack and gap in a foundation that lacks proper waterproofing. Gatineau Concrete digs to the footing, applies a bonded membrane, installs new weeping tile in drainage stone, and backfills so water moves away from the wall instead of into it. We handle new pours before backfill and retrofit existing foundations that are already leaking. Every project includes a free written estimate and firm schedule.
Interior sealers and coatings address the leak after it has already soaked the concrete. The wall stays saturated, freeze-thaw cycles keep cracking it wider, and the paint flakes off within a few years. The real problem is still there, pressing from outside.
Proper waterproofing means excavating to the footing, cleaning the wall, bonding a membrane that stays bonded, installing drainage board, replacing the weeping tile, and backfilling with stone that channels groundwater down to the tile instead of letting it pool against the slab. This is the standard on every new foundation pour before backfill, and it is what fixes a leaking basement when retrofit work is needed.
When the wall has structural cracks, pair waterproofing with crack injection so the concrete itself is sealed before the membrane covers it. The two services work together to keep the foundation dry for decades.
Recent work
The sequence
How Foundation Waterproofing Gets Installed
Assess the wet spots
We identify which walls are leaking, check the grade and gutter system above, and determine whether the weeping tile is clogged, failed, or was never installed. This tells us what the actual problem is.
Excavate to the footing
We dig down the affected wall sections to expose the foundation from footing to grade, remove old coatings and failed waterproofing, and inspect the concrete before any new system goes on.
Bond the membrane
A waterproofing membrane is applied to the cleaned wall from footing to grade, drainage board is installed over it, and the system is allowed to cure before backfill begins.
Install drainage and backfill
New weeping tile is laid at the footing in clean drainage stone, the trench is backfilled with stone that lets water move down to the tile, the grade is restored, and gutters are extended away from the wall.
Why interior fixes fail
Paint and Sealers Don't Stop Groundwater Pressure
Many homeowners have tried interior waterproofing paint or epoxy before calling us. The paint peels, efflorescence returns, and the wall is still damp. The water is still on the outside, still pressing against the concrete, and the interior coating never addressed the real problem.
Exterior waterproofing with structural repair where needed is the only permanent fix. It is what we install on every basement renovation we complete, and it is what keeps the space usable for decades. The membrane, drainage board, and new weeping tile work as a system to shed water before it ever reaches the wall.
Interior vs exterior, weeping tile, retrofit work and what waterproofing actually keeps out.
Because the water is on the outside of the wall. Interior sealer paints over the symptom; the foundation behind it is still saturated and still freezing and thawing, which keeps working the wall apart. Exterior waterproofing stops the water from ever reaching the wall.
On almost every job, yes. If we are excavated down to the footing for waterproofing, replacing or installing weeping tile then is the right call. Bedding it in clean stone and tying it to the drainage system finishes the system.
Yes, if the leak is localised to one wall or one corner, we can excavate and waterproof that section only. We will be honest in the assessment about whether the rest of the wall is likely to fail next.
It seals over them from the outside, but a structural crack still needs crack repair on its own. The two services often go together, and we sequence them so the crack is properly addressed before the membrane covers it.
A properly installed exterior membrane with drainage board and new weeping tile is a decades-long fix. We use the same systems on new installations that are designed for the full life of the building.
Homeowner reviews
What Gatineau Homeowners Say About Their Waterproofing Jobs
Two interior sealer jobs failed before we called Gatineau Concrete. They went to the outside, did it right, and the basement has been dry through two springs since.
B. G.
Gatineau
★★★★★
Excavated one wall, replaced the weeping tile, put on a proper membrane, restored the landscaping cleanly. Wall is dry, yard looks like nothing happened.
J. P.
Ottawa
★★★★★
Honest that the leak was just one corner and we did not need to do the whole foundation. Saved us a lot. Corner has stayed dry through the rain we had since.
E. L.
Barrhaven
★★★★★
Big excavation, big mess on day one, but they put the yard back together by the end and the basement is bone dry. Worth doing once and properly.
O. N.
Nepean
From the blog
Concrete Guides & Articles
Practical reading on planning, finishes and caring for concrete in Gatineau.
Tell us which basement walls are wet, when the leak started, and what you have already tried. We will inspect the foundation free and provide a written quote for any waterproofing work needed.
