Basement Waterproofing in Yelm, WA

Basement waterproofing in Yelm: what to know

An exterior drain laid at footing depth gathers seepage and carries it to a lot outlet. An interior channel handles water that gets onto the slab. Where the floor sits lower than every outlet, a sump and pump raise the water, and the discharge follows the same routing rule. A discharge that would reach the road may need a right-of-way permit, so it is kept off the public right-of-way and neighboring lots.

YMC 13.20.050(D) leaves upkeep with the owner, and YMC 13.20.050(B)(1) says facilities shall be inspected annually. The scope lists the sump lid, pump, and outlet as owner items as well, and the owner’s inspection is written into the scope. Work that alters a load-bearing element goes to the city before cutting starts.

Permits and rules in Yelm

Before digging begins, we check the sump and outlet route against the lot lines and the public right-of-way, and we confirm whether a load-bearing change needs a permit under the state building code. Planning and Building issues those permits, and its answer goes into the file. Cutting waits until the outlet and the permit question are both settled.

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

How we approach it

Follow the seep path at footing depth before picking a fix
Lay an exterior drain at footing depth wherever gravity works
Install a sump only when the floor is lower than every outlet
List the pump, lid, and outlet as owner-maintained items

For the full process, see our Basement Waterproofing page.

Our basement waterproofing work, serving Yelm

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

Questions from Yelm homeowners

Is a Yelm basement drain run covered by a permit?

Planning and Building issues the permits the state building code requires, so we ask the city whether a drain run needs one before any digging. Work touching a bearing element is cleared with the city first, and the answer is kept in the file.

Where does sump water end up on a Yelm lot?

At an outlet on the lot that keeps clear of neighboring lots and the public right-of-way. If the route would reach the road, the public works director is asked before any trench is dug, since a right-of-way access permit may be required.

Who looks after a Yelm basement sump?

The owner does. The scope lists the pump, lid, and outlet on the owner’s checklist, so the check is written down rather than left to memory.