Concrete floor installation in Duluth MN - a slab that stays flat and dry

Maybe it's a basement or shop floor that's cracked and heaving, a shed that's sat on dirt for years, or a new space that needs a slab before anything else can happen, and if an old slab has to come out first, concrete cutting gets it out in pieces we can haul. The price moves with the size of the floor, how much soft ground has to come out, whether it needs steel inside and a moisture layer, and any staining or stamping on top, while the schedule mostly turns on the weather, the curing wait and a permit if your job needs one. I'll walk through all of it with you at the estimate, so you know what you're paying for before we start.

It starts with questions, because what the floor is for and what goes on top of it decide most of what follows. Our crew digs out the topsoil and any soft spots down to firm subgrade, the ground the slab sits on, then packs the fill by rolling, vibrating or tamping it so the slab doesn't settle with the dirt. We check where water runs and set the slope so it heads away from anything it could hurt. If tile, wood or a coating will go over the floor, we plan the moisture layer around it, and one floor guide says a vapor retarder, a sheet that blocks moisture coming up from below, protects coverings and coatings best when it sits right against the slab. Where the load calls for it we set rebar, steel bars that help hold the slab together, and we lay out the control joints ahead of time, the grooves we cut so any cracking has a straight line to follow instead of wandering. We pour in the cooler part of the day so the top doesn't dry too fast and turn dusty, and we start curing it right away. If the budget gets tight, I'd rather trim the finish than the base, because nobody sees the base on day one but you live with it as long as the floor is there.

Floors usually connect to other work. If the slab opens out toward a pool, the same base and drainage thinking goes into the concrete pool decks we build, and where the floor sits a step or two off the yard, we can form concrete steps so the levels match.

Whether a floor on its own needs a permit in Duluth isn't settled for every job, so the place to ask is the city's Construction Services & Inspections office, which takes building applications. When a job needs a permit, we pull it and book the inspections, and if you'd rather apply yourself, I'll tell you what the city will want to see from us.

The bigger factor here is the ground and how far frost gets into it. In St. Louis County the state has footings go at least five feet deep because of freezing, unless a soils engineer decides otherwise, and that same cold works on the dirt under a floor, so we dig out wet, soft spots and pack the base instead of raking the old dirt level. We meet the same freeze and thaw on floors in Hermantown and Superior, and we're based in Duluth and work across the cities around it, Cloquet included.