Grading & Downspout Drainage Fixes · Waterloo
Grading, Downspout and Window Well Drainage Fixes in Waterloo
On Moraine sand, most water that reaches your foundation was put there by the roof. Before anyone talks about digging or injecting, the downspouts, the grade and the window wells get looked at, because that is often the whole job.
A Waterloo roof sheds a large volume of water in a storm, and every downspout concentrates a share of it into one spot at the base of the wall. If that spot is a splash block sitting on ground that slopes back toward the house, or a downspout that drops straight into the soil at a corner, the foundation at that corner is standing in a puddle every time it rains. On the sandy ground that covers much of Waterloo, water dumped at the wall goes straight down the backfill to the footing. On a clay pocket it sits. Either way, the crack that weeps every spring in Beechwood or the damp corner in a Lakeshore bungalow is very often fed by the roof, and the fix starts outside.
What gets checked on every visit
- Where each downspout goes. Into the ground, onto a splash block, or into an extension that somebody kicked off years ago. Downspouts that go into the ground on older Waterloo houses were often connected to the weeping tile or the storm sewer, and a broken or blocked underground connection pours roof water straight into the footing drain.
- The grade in the first two metres. Soil settles against a foundation over the years, especially where clay backfill was used, and the ground that once sloped away now slopes in. Gardens built up against the wall, mulch beds and edging all trap water against it.
- Window wells. A well with no drain, or with a drain silted up decades ago, fills in a storm and pushes water through the window frame or the crack below it. Very common on 1980s and 90s houses across Waterloo.
- Hard surfaces. Driveways, walkways and patios that pitch toward the house, and the joint where they meet the foundation.
- The neighbour. On the tight lots uptown and in the university district, a neighbour's downspout or a driveway that drains onto your side yard is a common source.
The fixes
Downspout extensions and reroutes. Getting the discharge well away from the wall and onto ground that slopes away. Where an above-ground extension is in the way of a walkway or a door, a buried solid pipe carries the water to a pop-up emitter or a dry well on the part of the lot that drains. Underground downspout connections that are broken get disconnected and rerouted rather than left to feed the footing drain.
Regrading against the foundation. Adding and compacting soil so the ground slopes away from the wall, using material that sheds water rather than the clay that was there, and keeping the finished grade below the top of the foundation so siding and brick stay clear of the soil. Gardens against the wall are lowered or moved. On a raised ranch or a house with a low brick ledge this needs care, and it is not a matter of dumping a truckload of topsoil against the house.
Window well drainage. A clear-stone base with a drain to the weeping tile where one exists, a well that is properly attached to the wall, gravel to the right depth, and a cover where leaves and snow are the problem. Where the window well sits over a crack, the crack is dealt with at the same time.
Surface water paths. Small swales, drainage at the low point of a walkway, and trench drains where a driveway drains toward a garage or a basement walkout.
Why this comes first
It is cheap, it is fast, and it is honest. A waterproofing contractor who jumps to excavation before checking the downspouts is either not looking or is looking at their invoice. Some Waterloo leaks are fully solved by moving the water away from the house. Others are not, and then the grading work is done anyway, because an interior system or an exterior membrane that is still being fed by a downspout at the corner is doing more work than it should for the rest of its life.
New builds and lot grading
Newer subdivisions in Vista Hills, Columbia Forest and the north end were built with a lot grading plan approved by the city, and builders regrade before final approval. Once the sod has settled and the owner has added a patio and a garden, that plan is often gone. If the house is still under new home warranty, drainage and grading problems should be raised with the builder and the warranty program first, before anyone else touches the lot. Where the warranty period has passed, the grade gets rebuilt to shed water. Lot grading questions inside the city go through the City of Waterloo, and moving water onto a neighbour's lot is not an option, so the discharge is planned to stay on yours.
Frequently asked questions
Can a basement leak really be fixed by moving a downspout?
Often, especially on the sandy Moraine ground that covers much of Waterloo, where water dumped at the wall goes straight down to the footing. A downspout at a corner, a window well with no drain and a grade that slopes toward the house account for a lot of leaks. They are checked before any larger work is quoted, and sometimes they are the whole job.
My window well fills up in a storm. What is wrong?
The well has no drain, or the drain is blocked with silt and leaves, so it fills like a bucket and pushes water through the window or the crack beneath it. The fix is a clear-stone base with a drain to the weeping tile where there is one, a well properly fixed to the wall, and a cover if leaves are the problem.
How far from the house should downspouts discharge?
As far as the lot allows onto ground that slopes away from the foundation, and never onto a neighbour's property. A short splash block on ground that slopes back toward the wall is close to useless. Where an extension is in the way, a buried pipe to a pop-up emitter or a dry well on the draining part of the lot does the job without a tripping hazard.
Serving Waterloo and surrounding areas. Contact us for a no-obligation quote specific to your property.