Mamba Drainage Services
Perimeter Drainage Vancouver
Wet basement. Soggy backyard. Water tracking down the foundation wall in October rain. That is a failed perimeter drain, and guessing at it costs more than scoping it.
We install, replace and hydro flush perimeter drainage on Vancouver homes built between 1910 and 2025, and we scope every line on camera before we dig.
Why Vancouver perimeter drainage fails
Perimeter drainage, also called weeping tile or foundation drainage, is the perforated pipe buried at the base of your footing. It catches groundwater before the water can push through the foundation wall. BC has required it on every new residential build since the 1973 BC Building Code revision. The pipe they put in the ground has changed three times since.
Pre-1960 East Vancouver houses on Commercial Drive, Knight, Victoria Drive and Hastings-Sunrise often have no perimeter drain at all. Just gravel against the footing, or porous clay tile that has already collapsed. Houses built between 1960 and 1985 usually have unperforated clay tile or vitrified clay pipe that is brittle, cracked and root infested. Houses from 1985 to 2005 have 4 inch black corrugated polyethylene that crushes under settling soil and silts up. Anything from 2005 on is 4 inch rigid PVC or HDPE, which is the only material we will put back in the ground today.
The failure is almost never the whole loop at once. It is one leg, usually the leg under the heaviest roof runoff.
What perimeter drainage repair takes in Vancouver
There are three tiers of perimeter drainage work and they are very different jobs. Knowing which one you need before anybody digs is the difference between a service call and an excavation.
Tier 1, hydro flushing. If the tile is still structurally sound but blocked with sediment, roots or root scale, a high pressure flush at 4,000 PSI restores flow with no excavation. We pull the cleanout caps at the corners, or install them if your system never had any, which has been a mandatory upgrade since the 2011 BC Code. Then we feed in a sectional jetter nozzle and flush the line back through the footing to daylight or to the storm connection. Lasts 3 to 7 years on healthy tile.
Tier 2, spot repair. If the camera shows a single belly, an offset joint or a root broken section under 8 feet of pipe, we open that point only. Rigid PVC goes back in, re-bedded in clean drain rock and filter fabric, then backfilled. City of Vancouver does not require a permit for a repair under 10 feet. What moves the number is the depth of the footing and the landscaping that has to come back.
Tier 3, full replacement. Two sides of the foundation or more, or any line over 30 years old with several failure points. We excavate to the footing on the affected sides and install 4 inch perforated rigid PVC bedded in 12 inches of clear 3/4 inch drain rock inside a non woven filter fabric envelope. Cleanouts go in at every corner and at the daylight or storm tie in. The foundation wall gets peel and stick membrane and a dimpled drainage board before anything is backfilled. That one needs a permit from City of Vancouver Plumbing and Gas, and we pull it under our own licence.
What a failing perimeter drain looks like
In order of severity. By the time you get to the bottom of this list the system has been failing for at least two winters.
- Efflorescence, the white chalky bloom, on the inside of basement walls
- A damp musty smell that shows up after the first big October rainstorm
- Visible water tracking down the wall at the corners
- Standing water in the basement during an atmospheric river
- Water sitting in a window well after the rain has stopped
- A gurgle from the cleanout when the downspout runs
- Moss or a soft spot in the lawn on one side of the house only
What Vancouver customers say
Ryan was great! My landlord called him to fix my blocked kitchen sink. He showed up the same day (on a Sunday) and fixed the problem. He even cleaned the sink and dried up all the water that had leaked before he got there. And he was very careful coming in and out of the house so my cat wouldn’t get out. I’d definitely recommend him.
Ryan is INCREDIBLE. He has been responding to all of us (four houses and families!) affected by a sewage back up. This is all on Boxing Day and beyond, in terrible weather full of ice, cold and rain. He is so knowledgeable, and knew what was needed right away. Just the top of his field I am sure. As well as that, he is incredibly calm, respectful, kind and fair. I am truly amazed by this person's capacity and competence in combination with his noble, calm presence in the face of a real mess. Thank you Ryan, so very much!
I had very positive experience with Mamba Services, Ryan was amazing to work with and took care of my drain issues in no time. He arrived on time, was very professional and efficient in carrying out the work. What impressed me was how honest he was in recommending needed repair. He was very patient in explaining the different options. I will certainly call them for future projects.
Had an excellent experience. Ryan was fantastic, it was an after hours call late in the evening and he showed up exactly in the time frame he gave. Took care of the kitchen sink issue within minutes all systems were running like new. Pricing was extremely reasonable, Ryan was patient and explained everything to me while fixing my problem. I would highly recommend this company for any plumbing work.
Ryan was efficient, experienced, and knowledgeable. He was able to squeeze me into his schedule with short notice and wasted no time with my appointment. He arrived on site inspected the issue, and was quickly at work with resolving the problem. I am very pleased with his service and honesty. He provided recommendations that will help assist me in future occurrences.
24/7 emergency dispatch
Get eyes on the drain before anyone digs
A camera scope goes on every perimeter drainage quote. You see what is failing under the foundation, then you decide. No guessing, no digging blind.
Perimeter drainage FAQ, Vancouver
It comes down to how many sides of the foundation we open up. A two side replacement on an East Van bungalow and a full four side on a 2,000 square foot Vancouver Special are very different jobs. Either way the quote covers the permit, the materials, the foundation waterproofing, the dimple board, the drain rock, the filter fabric, the cleanouts and the 5 year workmanship warranty. You get the number in writing after the camera scope.
Yes. City of Vancouver Plumbing and Gas requires a permit for work on foundation drainage, including full replacements and spot repairs over 10 feet. We pull the permit under our plumbing licence and you get the final inspection signoff from the City inspector.
Sometimes. If the problem is sediment or root infiltration in tile that is still structurally sound, a hydro flush at 4,000 PSI restores flow with no excavation. If the pipe itself is collapsed, cracked or offset, the dig is unavoidable. The camera decides which one you are looking at.
Modern PVC in drain rock with filter fabric lasts 50 years and up. Pre-2005 corrugated black plastic gives you 15 to 25 years before it crushes. Pre-1985 clay tile runs 30 to 60 years before roots force a replacement. Pre-1960 unperforated tile, or no system at all, should be assumed failed.
Yes, and it is the cheapest money you will spend on the deal. A pre-purchase scope shows exactly what is under the foundation, and it has saved buyers on three deals for us this year alone. Anyone quoting a perimeter drainage replacement off a walk around the driveway is guessing, and that number always goes up once the machine starts.
Usually, but not always. Wet basements in Vancouver come from four places: failed perimeter drainage, failed foundation waterproofing, an interior plumbing leak, or plain condensation. A camera scope of the perimeter plus a look at the foundation tells you which one you have before you spend anything.
Yes. We partner with Financeit for 0% interest options up to 24 months. The application is online and you can do it from your phone while we are still on site.
Plan on losing whatever grows in the 4 foot band along the foundation on the affected sides. We cut, set aside and replant cedar hedge, lawn and small ornamentals at no extra charge. Mature trees, hardscape and irrigation are excluded, and we walk those with you during the quote.
Yes, all of Greater Vancouver, on the same pricing structure. That covers Metrotown, Brentwood, New Westminster and every Vancouver neighbourhood.
Perimeter drainage on multi unit strata buildings is roughly a third of our year. We work with property managers and councils, present scopes at AGMs, and provide certificates of service for insurance and reserve fund audits.
24/7 EMERGENCY DISPATCH
Water where it should not be?
Ryan picks up. Live dispatch, and you get a real arrival window on the call.