Floor Leveling
A flat floor is the first step to finishing your basement, and a finished basement is the most affordable way to add real living space to a Seattle home. Before LVP, tile, hardwood, or carpet goes down, the slab underneath has to be level, or you end up with cracked tile, hollow spots, squeaks, and gaps along the baseboard. We level basement and interior concrete slabs across Seattle so the finished floor sits flat and stays that way.
Finish your basement this winter, without moving out
Basement leveling and floor prep happen entirely indoors, so we work right through Seattle's wet winter while everyone else waits for summer. And because it is interior work, you keep living in your home the whole time - no renting elsewhere, no packing up the house. It is the most overlooked way to add livable square footage to a Seattle home.
Services
- Basement floor leveling
- Uneven and sloping slab correction
- Self-leveling underlayment installation
- Concrete grinding and high-spot removal
- Floor prep for LVP, tile, hardwood, and epoxy
- Garage and shop floor leveling
Why Seattle Slabs Move
- Expansive clay soils that swell and shrink with the seasons
- High winter water tables under older basements
- Settling from poor original subgrade compaction
- Drainage problems that wash out support beneath the slab
Our Process
- 1On-site assessment - we measure the slope and map the low and high spots
- 2Diagnose the cause - if water or drainage is moving the slab, we address that first
- 3Prep and grind - remove high spots and clean the surface for a solid bond
- 4Level - pour self-leveling underlayment or patch to a flat plane
- 5Cure - most floors are ready for finished flooring within about 24 hours
The fix is not always more concrete on top. In Seattle, a moving basement slab is often a drainage problem. We will tell you honestly whether you need leveling, drainage work, or both, and we handle the French drains and foundation drainage too.
What customers say about our floor leveling
3 of our 103+ five-star reviews mention floor leveling.
"Chris and his crew did an amazing job leveling our garage floor and completing a French drain project we started ourselves. I was impressed by how quickly they got the project done and appreciated their patience when answering all my questions."
"Hired Chris to recoat my aged driveway, level one corner and fix a poor quality driveway drain. I got quotes from several concrete contractors but was most impressed with his knowledge. Unlike many contractors, Chris specializes in concrete work only and it shows. The results were amazing. The 30 year old driveway looks like new!"
"We had Chris and his crew out to pour a slab in our crawl space, cut a window in our wall and level the floor in a room. Everything they did was excellent and we will be reaching out again for future work!"
Backed by a 1-year workmanship warranty
Portal warrants its workmanship for 1 year from substantial completion. Normal concrete cracking, misuse, and site conditions are excluded. Read the full terms.
What Floor Leveling Looks Like
