Garage floor concrete in Renton WA - a floor that drains toward the door
Cracked or sunken garage floor? We break out the old slab, pack a firm base and pour a new floor with planned joints.
- Licensed and insured.
- Free in-person estimates.
- We respond within 1 business day.
What does it take to pour a new garage floor in Renton?
Garage floor concrete in Renton is a new slab poured on the ground inside your garage, and how well it holds up comes down mostly to the packed base under it and where the water goes.
Most people call us when the old floor has cracked across, dropped near the door or started holding water, and a few call because a new garage is going up on bare ground. The price moves with the size of the floor, whether there's an old slab to break out and haul away, how much base work the ground needs and the reinforcement the floor calls for. The schedule turns on whether your project needs a permit and on curing, the days a new slab needs to gain strength before you park on it. I'd suggest we walk the garage together first, so the written estimate shows exactly what your floor needs before anything is poured.
How do you know your garage floor needs replacing?
Cracks that keep widening
A crack that's wider than it was a year ago, or one where one side sits higher than the other, usually means the ground under that part of the slab has moved. Waiting lets water and grit work into the gap, and the edges chip and spread.
Water pooling on the floor
Puddles that sit after you pull the car in, or water creeping toward the back wall, usually mean the slab has settled or was never sloped toward the door. Over time that water finds its way under the floor and weakens the ground it rests on.
Dust and flaking on top
A surface that leaves grit on your shoes or flakes off in patches usually means the top was finished at the wrong moment or dried out too fast. Tires and foot traffic wear it down further every year, and a weak top doesn't get stronger with age.
How we pour garage floor concrete
If there's an old floor, we break it out and haul it away first, then dig down to firm ground rather than raking the dirt level, because a slab only stays put when the subgrade, the ground it sits on, can't settle under it. We bring in base rock and pack it well, check where water runs at the door so the floor drains out and not back toward the house, and lay a vapor retarder, a sheet that slows moisture coming up from the ground, when your plans for the space call for one. I'll talk with you about wire, bars or fibers depending on what the floor has to carry, and on pour day we place and finish the concrete and then saw the control joints, shallow cuts that give cracks a planned place to go, because no slab is crack free and I'd rather choose where any cracks show. If the budget is tight, I'd keep the money in the base and save on the finish, since a fine surface on a poor base tends to crack and settle with the dirt, while a plain floor on a good base usually holds up for years.
A garage floor rarely stands alone. If you'd like the apron or a nearby walk to be more than plain concrete, our decorative concrete work can match it to the house, and where the garage is set into a hillside and the ground beside it needs holding back, we build concrete retaining walls as well.
Replacing an old garage floor
This suits a slab that's cracked through, sunk or holding water, because the trouble is usually underneath it. We break out the old concrete, haul it away and rebuild the base before the new floor goes in.
A floor for a new garage or addition
This suits a garage going up on bare ground, where we can build the base right from the start. We set the floor height and slope to meet the door and the driveway so water has a clear way out.
Get a written estimate for your garage floor
We reply within one business day. I'll set a time to come out, measure the garage and put the scope in writing, and the estimate is free with no obligation.
(425) 264-4089- Based in
- Renton, WA 98057
- Hours
- Mon–Sun: 7 AM–11 PM
What happens after you call about a garage floor in Renton?
Here's how a garage floor job runs with us, from your first call to the walk-through on the finished slab.
Call or send the form
When you get in touch, I'll set a time to come out to the garage. If you know roughly how big it is, mention it, since that helps me plan the visit.
I measure and write it up
I look at the site, take measurements and ask how you plan to use the space, then give you a written estimate covering the prep, the concrete work and anything we'll ask of you before pour day, so you can compare it with any other quote. We also go over what the city or county may want to see.
The crew preps and pours
We keep the work area neat and cover what needs covering, so your walls, driveway and the neighbors' cars aren't left with splatter or dust. The base and layout get their time before the truck arrives.
Walk the finished floor together
Before we pack up, I walk the finished floor with you so you can see the joints, the slope toward the door and the surface up close. Then the slab cures before anyone drives on it.
Why Renton homeowners call Form & Pour Renton Concrete Company for garage floors
I measure and quote it myself
I come out myself to look at the garage, take the measurements and answer your questions, and a small crew I work with does the work while I check in as it goes. That way the person who wrote your estimate is the one keeping an eye on your floor.
In business since 2017
I started out pouring walkways and fixing steps for neighbors on weekends, learned beside experienced finishers and made it a full business in 2017. Those early jobs taught me that the prep you can't see matters more than the finish you can.
Licensed and insured in Washington
We're licensed and insured. Washington requires every construction contractor to register with the state Department of Labor & Industries, known as L&I, so you can look us up before you sign anything.
If you'd like me to take a look at your garage, call (425) 264-4089 or use our contact page, and I'll set a time to come out.
Garage floor permits and site work in Renton
In Renton, the city's building official issues the permits required for work to construct, alter, repair or demolish a building structure, and the city requires a Civil Construction Permit for site work with more than 500 square feet of new or replaced hard surface. Those rules don't settle on their own whether your garage floor needs a permit, so the place to ask is City of Renton Permit Services, and I'd rather you hear it from them than from me. At the estimate we go over it with you, check which city or county office covers your address, and can handle the application or help you with yours.
Some homes near Renton sit just outside city limits, where a different office may cover permits, so it's worth searching your address in the city's COR Maps tool before work starts. On jobs in Kent and Auburn we make the same check with whichever office covers the address before we plan the pour.
Questions about garage floor concrete in Renton
Will a new concrete garage floor crack?
Some cracking is likely, because even a well-designed, well-built floor can't be expected to stay completely crack free. What you can judge is how a contractor controls it, which for us means the packed base and pour-day joints described above. If a bid promises no cracks at all, I'd ask how they plan to manage that.
How much does a new concrete garage floor cost around Seattle?
A garage floor slab in the Seattle and Puget Sound area usually costs about $8 to $14 per square foot. That's the going rate in the area, not our price, and your written estimate covers the prep and concrete work for your own garage.
How do I find out if my garage floor needs a permit in Renton?
Email City of Renton Permit Services at PermitTech@rentonwa.gov, which is where the city points owners who aren't sure whether a project needs a permit. It helps to say whether you're replacing an old slab or pouring a new one and roughly how big the floor is, and I'm glad to go over their answer with you at the estimate.
How do I check that a concrete contractor is registered in Washington?
Search the contractor's name in the Verify a Contractor, Tradesperson, or Business tool from L&I, where registered contractors are listed. It's worth doing for every bidder, ours included.
What causes a new garage floor to crack, dust or hold water?
Poor timing is a common cause, because national slab guidance treats the timing of finishing, jointing and curing as critical and links bad timing to cracking, a surface that wears quickly, high or low spots and poor drainage. The same guidance says crews usually cut the joints within 4 to 12 hours of placing the concrete, depending on temperature and the mix, which is why our crew stays to cut them that day.
What is the best way to reinforce a garage floor slab?
Rebar, the steel bars set inside the slab, or welded wire is the better choice when the floor needs extra strength, while fibers mixed into the concrete mainly cut down on cracking and don't add structural strength. Bars and wire also help keep any cracks that do form narrow. Tell me what you'll park or store on the floor, and we'll choose between them at the estimate.
Related services for the space around your garage
Decorative concrete adds color, texture or a stamped pattern to patios and walks, which can make the concrete around your new garage look like one planned project.
A retaining wall holds back soil where a garage or driveway is cut into a slope, keeping dirt and runoff off the slab and away from your foundation.
Service areas for garage floors around Renton
Form & Pour Renton Concrete Company is based in Renton, WA, and the 12 cities below each have their own page, including Kent and Bellevue. We work in other cities around Renton too, so if yours isn't listed, please just ask.
Renton, WA
Book a look at your garage floor
Have your address and the garage's rough size in square feet ready when you call or fill in the form, and I can plan the visit before I come out.