Our winters deliver sustained rain rather than dramatic storms. That favours a specific failure mode: water that sits against a building long enough to find its way in.
Where the water should go
Grade should fall away from the foundation for at least the first couple of metres. Downspouts should discharge well clear of the building, not onto a splash block at the wall. Perimeter drains should be functional and not blocked by roots or sediment.
When any of these fail, the result is the same: saturated soil against the foundation.
What I look for
I walk the full perimeter and read the evidence.
- Negative or flat grade at the foundation
- Downspouts discharging at the wall or into unknown buried lines
- Efflorescence, staining or dampness on foundation walls
- Soft or elevated soil against siding
- Crawlspace moisture, standing water or rusted metal
- Settlement or erosion patterns in landscaping
The good news
Drainage is one of the cheapest categories of repair relative to the damage it prevents. Extending downspouts and correcting grade is often a weekend of work, and it removes the driver behind a large share of the foundation and crawlspace issues I document.
Why water is the expensive one on this coast
Vancouver Island gets a lot of rain, concentrated into a long wet season. That means the building envelope and the ground around it are doing sustained work for months at a time, and small failures do not stay small.
Almost every expensive problem I document — rot, foundation movement, crawlspace deterioration, mould growth, damaged finishes — begins with water that was not directed away from the building. The mechanical and electrical systems age on a schedule. Water damage compounds.
Where the water actually goes
The path is simple to trace once you know to look. Rain lands on the roof, moves to the gutters, travels to the downspouts, and then either leaves the property or does not. That last step is where most houses fail.
A downspout that discharges at the base of the wall is depositing a very large volume of water in exactly the worst place, repeatedly, all winter. Extending it a few metres is among the cheapest meaningful improvements available to any homeowner.
- Gutters that are full, sagging, or pitched the wrong way
- Downspouts discharging at the foundation instead of away from it
- Ground sloping toward the building rather than away from it
- Patios, walkways and driveways that shed water back at the house
- Garden beds and mulch built up above the foundation wall
- Window wells without drainage
Grading: the cheapest fix nobody makes
The ground should fall away from the building for the first couple of metres. That is the whole principle. Over time, settlement, landscaping, new patios and accumulated garden beds quietly reverse it, and nobody notices because it happens over years.
Re-establishing positive slope is usually straightforward and inexpensive compared with the consequences of ignoring it. When I flag grading, I am not being pedantic — I am pointing at the mechanism behind the crawlspace moisture and the basement stain on the same report.
What poor drainage looks like from inside
By the time drainage problems are visible indoors, they have usually been developing for some time. Efflorescence on foundation walls, damp or musty crawlspaces, staining at the base of walls, and persistently high humidity in a basement all point outward.
This is why I walk the perimeter before going under the house. The interior symptoms make much more sense once you have seen the exterior cause.
What to check on your own property
You do not need an inspector to do a useful first pass. Wait for heavy rain and go outside with a jacket. Watching where water actually goes during a real downpour tells you more in ten minutes than any amount of speculation on a dry day.
- Walk the perimeter during rain and watch each downspout discharge
- Look for pooling within two metres of the foundation
- Check that gutters are running rather than overflowing
- Note any spot where the ground slopes back toward the wall
- Clear gutters seasonally, especially under heavy tree cover
Thinking about a property?
Call Craig and talk it through before you book — Vancouver Island, residential and commercial. 778-681-2874 or book an inspection.