Exterior Waterproofing · Nepean, ON
Foundation waterproofing in Nepean
Korvex Construction waterproofs foundations and fixes basement leaks from the outside in Nepean, in Crestview, Parkwood Hills, Qualicum-Graham Park, Trend-Arlington and the streets around them. We excavate the wall that leaks, repair cracks, waterproof the wall, replace failed weeping tile and regrade, with the dig planned around mature trees. The free on-site estimate comes before any price.
- Waterproofing layer
- Weeping tile
- Clear stone
- Compacted backfill
- Dimpled membrane
The local picture
Exterior Waterproofing in Nepean
Crestview, Parkwood Hills and Qualicum-Graham Park were built mainly from the late 1950s through the 1960s. A basement of that age has been through some sixty winters, and the leaks we find on these streets usually come from ageing parts: weeping tile that has silted up, cracks that have opened over time, and ground along the wall that has sunk toward the house.
Trees planted with those houses are now large. The City protects private trees 30 cm or wider at 1.3 m up in the urban area, with a critical root zone of 10 cm out for every 1 cm of trunk. An excavation along a wall can come inside that zone, so we measure the tree, plan the dig and check whether a permit applies before any soil comes out.
Sixty-year-old basements in established Nepean
Crestview to Trend-Arlington
Korvex Construction repairs basement leaks from the outside for Nepean homeowners: excavation along the affected wall, crack repair, a waterproofing layer below grade, new weeping tile in clear stone, then backfill and regrading. The free on-site estimate looks at the wall from both sides, and the written quote follows.
Nepean was its own city until amalgamation in 2001, and Trend-Arlington kept building from the 1960s into the 1980s, so two houses a few streets apart can be a generation apart below grade. The visit starts with dates and materials: when the house was built, what the wall is made of, and whether earlier repairs show on the outside.
Roots, trees and a drained foundation
Trees and clay meet at the foundation. A 1966 National Research Council digest on swelling and shrinking soils called vegetation a very efficient pump that pulls water out of tight soils, discussed tree roots on the Leda clay of the Ottawa valley, and recommended an effective tile-drain system and free-draining granular backfill around foundations.
On a Nepean lot, the tree near the wall is usually one the owners want to keep. We set the excavation and the stockpile on the side away from the root zone where the leak allows, and check the City’s tree rules before digging inside it. When a protected tree stands too close to the leaking wall, you hear that at the site visit, before the plan is fixed.
At the site visit
What we check on a lot in Nepean
- 01
Trunk sizes and root zones of trees within reach of the dig.
- 02
Poured concrete or block, and any earlier patching on the outside.
- 03
The old weeping tile: present, silted up or broken.
- 04
Widened driveways or patios that tip water toward the wall.
- 05
Whether the City has a grading plan for the lot on record.
- 06
Window wells and basement windows along the leaking wall.
What we plan around
Local conditions in Nepean
Each point links to the public source it was checked against. At the site visit we check how it applies to your lot.
- Mature trees and root zones
The City protects private trees 30 cm or wider at 1.3 m up in the urban area. Its critical root zone is 10 cm out per 1 cm of trunk, so a 30 cm tree reaches about 3 m.
How we build it
What exterior waterproofing involves
Every wall is different, so the drawing shows the parts most exterior jobs share. The order matters: the wall is repaired and sealed while it is open, the drain at the footing is renewed while the trench is down to it, and the ground goes back so it carries water away.
- Find where water enters
Stains, damp patches and the yard outside are read together, so the dig opens the wall where the water actually comes in.
- Locates first
Buried lines are located before any digging along the house.
- Repair, then seal
Cracks are repaired and the wall cleaned before the waterproofing layer goes on, all while the wall is exposed.
- Drain at the footing
The existing weeping tile is checked where the trench reaches it, and replaced where it is clogged, crushed or blocked by roots.
- Backfill that stays put
Backfill is compacted as it goes back, so the ground beside the wall does not sink into a dip.
- Weather
Frozen ground cannot be compacted properly, and coatings need temperatures above freezing, so on most Ottawa sites this is spring-to-fall work.
- Regraded surfaceShaped to fall away from the house, so rain and snowmelt run off.Graded to drain
- Compacted backfillPlaced back against the wall and compacted, so it does not settle toward the house.Compacted in layers
- Waterproofing layerOn the outside face of the wall, between the concrete and the soil.On the outside face
- Foundation wallExposed, cleaned, and cracks repaired from the outside before anything covers it.Cracks repaired outside
- Clear stoneAround the drain, so water from the soil reaches the pipe.Open and free-draining
- Weeping tile at the footingA perforated foundation drain led to an outlet planned for the lot.Led to an outlet
“Vlad and his crew installed my patio in 2 days. Did excellent work and vlad answered any and all questions I asked. I highly recommend Korvex Development for any job you may require.”
Joe Ayoub · Patio installed
“Did awesome work! had them repair a leany fence and they were on time, cheap and super professional”
Josh Cohen-Collier · Leaning fence repaired
FAQ
Exterior Waterproofing in Nepean: common questions
Will digging along the foundation harm our mature tree?
It can if the dig is planned without it. The City’s tree by-law protects larger private trees in the urban area, and injuring one needs a permit. We measure the trunk, work out the root zone, and keep the excavation and stockpile outside it where the wall allows. If the leak sits inside the zone, we tell you what applies before any digging.
Our weeping tile is original. Should it be replaced?
When water shows along the bottom of a wall after rain, the tile on that side is a likely cause. With the wall excavated we see its condition directly, and the written quote says whether that run is replaced in clear stone or kept. Where the yard itself stays wet, a French drain across the lawn can take surface water before it reaches the house.
Is our post-war basement wall poured concrete or block, and does it matter?
Ottawa houses of that era can have either, and the site visit settles which one you have. It changes the repair: a crack in poured concrete is sealed along its length, while a block wall can take water through its mortar joints and hollow cores, so the whole face of that wall is usually treated. Both get drainage at the footing.
Do you work in Nepean?
Yes. Korvex Construction builds and rebuilds decks, fences, interlock and backyards across Nepean, including Crestview, Parkwood Hills, Qualicum-Graham Park, Trend-Arlington and Centrepointe. A Nepean homeowner’s HomeStars review describes new fence posts and old panels reinstalled on them. Request a free estimate or call 613-880-7679.
Book a free exterior waterproofing estimate in Nepean
Tell us what you want built and send a few photos. We come out, look at what sits under the job, and give you the scope and the price in writing.