Portal — Seattle Concrete
The part — Portal Concrete, West Seattle
05 · Foundations

The part
nobody sees.

Footings, stem walls, slab-on-grade, garage slabs, ADU foundations. The structural concrete under your house is the most important concrete on your property. We pour it like our name is going on it — because it is.

The pitch

A house is only as level
as the slab under it.

Foundation concrete doesn't get a second chance. We pour footings and stem walls to spec — the right depth, the right rebar, the right cure. For ADU slabs and garage conversions, we work directly with your framer and engineer to keep the schedule tight.

02 · What we do

The full range.

New foundations

Footings, stem walls, slab-on-grade for new construction, additions, and ADUs.

Garage slabs

Thick-pour garage slabs with fiber reinforcement. Built for cars, shop equipment, and heavy storage.

Foundation repair

Underpinning, wall crack repair, settled-footing lifts. We fix what's moving before it gets worse.

ADU & addition slabs

Working with your framer and GC to hit schedule. Tight sites, coordinated trades.

04 · Our standards

Non-negotiable.

  • 01

    Footing depth to local frost line and soil bearing — not generic 12 inches.

  • 02

    Rebar schedule per the engineer's spec, placed with proper chairs so it stays centered during the pour.

  • 03

    Anchor bolts set during the pour at exact spec spacing. No drilled-in retrofits.

  • 04

    Stem wall height coordinated with framing — so the first course of siding clears finish grade.

  • 05

    Waterproofing membrane on any subgrade wall facing a living space.

Also pour
Retaining WallsDrivewaysRepair & Reconditioning

Ready to pour?
Let’s talk.

Free estimates. Fast response. Chris answers his phone.

Get a Free Estimate(206) 829-6396