Basement Waterproofing in Poulsbo, WA

Basement waterproofing in Poulsbo: what to know

The NRCS official series description for Alderwood places it in glacial drift and outwash over dense glaciomarine deposits. It lists a perched seasonal water table 12 to 35 inches down, present intermittently from December into April, and a densic contact at roughly 20 to 39 inches. Kitsap, somewhat poorly drained and developed on glacial lacustrine sediments and terraces, has a seasonal water table at a similar depth, at times from December to May. Which series sits under your lot is a mapping question, and we compare the wet-season line on the lower wall with these windows before choosing a method.

A footing drain only works while its outlet stays open and falls toward a safe discharge. We clear the run, take its grade with a laser level, and trace where the flow ends up. Excavation for a basement or footing under a building permit is exempt from PMC 15.40, but a cut outside that scope is measured against the 50 cubic yard and four-foot lines. Any tie into a public line is raised with the city before the connection is made.

Permits and rules in Poulsbo

Excavation beside the foundation waits until we confirm two points with city staff: whether the cut falls under the basement and footing exemption in PMC 15.40, and whether the discharge runs into a public line. A cut that leaves that exemption is measured against the grading lines, with cut and fill kept separate. We write both answers into the job record before the crew is booked, and we check the wet-season readings against the series windows described above.

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

How we approach it

Log the water line on the lower wall through one wet season
Trace downspout runoff away from the wall, corner by corner
Set the footing drain’s fall and confirm its outlet
Ask city staff before any tie into a public line

For the full process, see our Basement Waterproofing page.

Our basement waterproofing work, serving Poulsbo

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

Questions from Poulsbo homeowners

Why is a Poulsbo basement damp after a storm?

After heavy rain, water usually reaches the foundation across the surface, down a downspout, or from the slope above the house. We check those routes first and the footing drain second, so the repair targets the actual entry point.

What must happen before a Poulsbo footing drain ties into a public line?

We raise the tie with the city before making it, and we check whether an outlet on your own parcel can take the flow first. Nothing connects to a public line until the city has answered.

When does a dig along a Poulsbo foundation reach PMC 15.40?

Excavation under a building permit is exempt from the chapter, and a cut beyond that scope is measured against its lines. We ask city staff about your address before the excavation starts.