Basement Waterproofing in DuPont, WA

Basement waterproofing in DuPont: what to know

Roof runoff is followed from each downspout to its discharge point, and the grade at each corner is recorded before any repair is picked. The 2024 plan also names foundation drains, footing drains, and uncontaminated crawl space pump water as allowable discharges. That list says the flows are allowable; it does not say how they may join the city’s pipes.

Digging beside a foundation falls under the right-of-way chapter if the cut reaches a sidewalk, curb, or street, and that chapter requires a permit before work starts. The city’s Public Works Standards do not settle the grading question for a basement cut, so the cut is confirmed with the city before it is opened. Water from a roof that runs down the foundation is traced separately from water that rises from the footing.

Permits and rules in DuPont

Before any trench opens, we confirm whether the cut reaches the rights-of-way, and we confirm the discharge route with the city in writing. The allowable discharge list does not settle how a pipe may join the city’s system, so that join waits for the written reply. Each answer is recorded on the parcel file with its date.

Rules change and vary by parcel, so we confirm the current requirements with the city before we start.

How we approach it

Trace roof runoff at each downspout before quoting
Follow the footing drain to where it discharges
Confirm whether the cut reaches the right-of-way
Hold any storm-system tie-in for the written reply

For the full process, see our Basement Waterproofing page.

Our basement waterproofing work, serving DuPont

Examples of our work. We build basement waterproofing in DuPont and the cities around it. See all of our work

Questions from DuPont homeowners

Can a DuPont footing drain connect to city pipes?

The city’s stormwater management plan treats footing drains as allowable discharges, but it sets no join rule, so any connection to city pipes is confirmed in writing before work begins.

Why is my DuPont basement damp after a storm?

Damp after heavy rain can come from groundwater, from a footing drain that is not draining, or from roof water that runs down the foundation. We check each source before choosing a repair.

Does a trench next to a DuPont foundation need a permit?

It can, if the cut reaches a sidewalk, curb, or street, because the city’s right-of-way chapter requires a permit before that work starts. A cut that stays on private ground is confirmed with the city.