Concrete floor installation in Kirkland WA - a slab built for what goes on top
Old floor cracked, dusty or uneven? We pour a new slab planned around the covering you want, so it sits flat and wears well.
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What goes into a new concrete floor in Kirkland?
Concrete floor installation in Kirkland means placing a new slab, either on the ground or suspended above it, then finishing, jointing and curing it so it becomes the hard surface you walk on or lay flooring over.
Most people who call about a floor are finishing an addition or a shop, redoing a garage floor, or replacing an old slab that's cracked, dusty or out of level. The price moves with the size of the floor, how much digging and base work the ground needs, whether the slab gets steel and a moisture barrier, and what finish or covering goes on it. The schedule turns mostly on the weather and the cure, because we don't rush a slab to make a date, and I'll give you your own price after I've looked at the site.
How our concrete floor installation works
The first thing I'll ask is what flooring goes on top, because that changes how we build the slab underneath. From there our crew digs out the soft material and packs the subgrade, the ground the slab sits on, since a base that's only raked level settles later and takes the floor with it. We set the moisture barrier and the rebar, the steel inside that keeps any crack from opening wide, then pour early enough in the day that we're not finishing in the worst of the heat. Finishing and curing come down to timing, so I stay on the job through the troweling, the cutting of control joints, which are shallow grooves that give cracks a planned place to go because concrete does crack, and the curing, which is keeping the slab damp and protected while it gains strength. If the budget gets tight, I'd rather you trim the finish than the base, because the base is the one part you can't fix once the concrete is down.
A new floor often ties into work outside the door. If the room opens onto the backyard, we can pour concrete pool decks that slope water away from the house, and when the new floor sits higher than the ground, we build concrete steps so the drop at the door is easy to use.
Concrete floor installation rules in Kirkland
The City of Kirkland requires a permit to build, alter or repair a building, and its list of work that needs no permit names driveways and sidewalks but not floor slabs, so don't assume a floor is permit-free. The city's Development Services Center is the place to ask, and when a permit is needed I'll tell you at the estimate and either handle the application or walk you through it. Slab prep can bring its own rules, because the city requires a permit for digging out or bringing in more than 50 cubic yards of soil, or any amount that changes where water drains. The usual exemptions also don't apply in flood hazard, wetland, steep slope or shoreline areas, and the city's Property Search Tool makes a Parcel Report showing whether any of those cover your address, while lots with landslide-prone ground fall under extra zoning rules.
We're based in Kirkland and work across the cities around it, inside city limits and out in the county areas too. Plenty of the floors we pour are on tight lots where the truck can't reach the pour spot, so we plan the route for the concrete ahead of time, and on jobs in Bellevue or Redmond we check that city's rules before we dig.
New concrete floors, poured and finished
Get an estimate for your concrete floor
Send the floor size, the covering you plan and the property address, and we'll reply within one business day to set up a visit. I'll come out, look at the site and give you a free estimate, with no obligation to book.
(425) 285-8643Concrete floor questions from Kirkland homeowners
How much does a concrete floor cost in the Seattle area?
A concrete slab in the Seattle area usually costs about $7 to $14 per square foot, according to one local cost guide. In those figures a reinforced slab runs a little more than an un-reinforced pad, and staining or stamping costs extra beyond that range. Your own price comes from the estimate once I've seen the site and know what's going on top.
How long after pouring can I walk on a new concrete floor?
One Seattle-area cost guide says a slab should be walkable within 48 hours, and it suggests waiting about a week before heavier loads. The same guide puts full curing at 28 to 30 days, so the slab keeps gaining strength well after you're walking on it.
Can concrete be poured in cold weather in Kirkland?
Yes, concrete can go in during cold weather if it's kept from freezing, because national guidance says fresh concrete that drops below about 25°F can freeze and lose more than half its potential strength. The same guidance says to protect it until about two days after it's placed, so on a winter pour that protection is part of the plan and can shift the schedule.
How do I keep moisture in a concrete slab from ruining new flooring?
Plan for the covering before the pour, because national industry guidance treats sheet vinyl, vinyl tile, carpet, laminate, hardwood and epoxy coatings as moisture-sensitive, and slabs under them are built for it. That guidance says coverings get the most protection when the vapor barrier, the sheet that blocks ground moisture, sits right against the slab, so water from rain, curing or cleaning doesn't get trapped in the fill below.
What causes a new concrete floor to crack or dust?
Poor timing of the finishing, jointing and curing is a common cause, and national industry guidance ties those mistakes to cracking, dusting, which is a powdery top that rubs off, high or low spots and curling. The same guidance suggests asking any contractor how they plan and time those steps, since that shapes how well the floor stands up to wear.
How do I check a contractor's registration in Washington?
Look the business up with the state's Verify tool, which shows whether it has an active contractor registration and a paid-up workers' comp account. It also lists safety violations and any lawsuits against the contractor's bond.
Plan your Kirkland concrete floor with us
Call (425) 285-8643 or use the contact form with the floor size, the covering and the address, so I can come out already knowing what to look for.