Basement waterproofing in Kitchener-Waterloo, done from the inside: we cut a trench along your basement floor, lay interior weeping tile, and carry the water to a sump pit that pumps it outside. No digging up your gardens, deck or driveway.
New Dundee, Wilmot Township, Kitchener, Waterloo, Cambridge, Guelph, Milton, Halton Hills, Acton, Rockwood and Georgetown
Warning signs
Water in a basement nearly always comes in at the same few places. If you see any of these, it is worth a look.
What you get
One written price before we start. It covers everything below for the walls and floor areas we agree on. Time on site: about two days for a typical basement.
How it works
Think of it as a gutter, laid inside along the bottom of your basement walls. Water that seeps through the wall or comes up at the edge of the floor drops into the gutter and runs to one place, where a pump sends it outside.
The science in one line: groundwater pushing on the walls and floor (hydrostatic pressure) takes the easiest path. A perforated drain at the footing gives it an easier path than your floor joint, and the sump pump lifts it out.
Why it happens
We fix the reason, not just the puddle. Here is what we usually find, how we check, and what fixes it.
Recent work






Photos from an interior waterproofing job in an older Waterloo home.
Questions we get asked
It depends on how many feet of wall need a drain, whether you already have a sump pit that is deep and wide enough, and what is in the way, like finished walls or flooring. We measure your basement and give you one written price before we start, so there are no surprises. A new pit with a pump is $2,400 plus HST on its own; the drain work is priced per job.
They work differently. Exterior work keeps water off the outside of the wall, but it means digging up gardens, decks, walkways and sometimes a driveway. Interior waterproofing lets water reach the footing and carries it away under your floor before it reaches you. For most homes it is less disruptive and costs less. We only do interior work.
Yes. An interior drain needs somewhere to send the water. If your existing pit is deep and wide enough for the float to work properly, we use it. If not, we put in a new, deeper pit. We always recommend a sump pump with a battery backup, because heavy rain and power outages often come together.
Most of the time goes into cutting and digging, then letting the new concrete set. A typical basement takes about two days on site. We tell you the schedule in writing before we start.
Cutting concrete makes dust and noise. We bag the debris and take it away, We wet-cut the concrete, which keeps the dust down, and we can tarp off the work area or set up ventilation. You will need to clear about four feet along the walls we are working on.
A new sump pit, sump pump and floor drains are plumbing work, and plumbing work in Ontario usually needs a permit. Rules vary by city, so we check with your building department before we start and pull the permit when one is required.
Water that comes through a wall crack runs down behind the dimple board to the floor, where the interior drain catches it. We do not do crack injection. If a crack is letting in a lot of water, we will tell you.
We need to reach the bottom of the walls. That usually means opening the drywall and flooring along the walls we drain. That part is done by another trade, and if you want the whole job handled by us, we can coordinate the other trades for you.
The sump pump pushes it outside through a discharge pipe, away from your foundation, so it does not soak back in. We check where it ends up before we finish.
We guarantee our work for a year when we supply the equipment. We pick brands we trust, and that is what lets us stand behind them.
If sewer backup is also a worry, a backwater valve stops sewage from coming back up your floor drain. It is a separate job, and it is easiest to do while the floor is already open. Ask us about both together.
Interior basement waterproofing
Call or book a visit. We look at where the water comes in, then give you one written price before we start.