Slab-on-Grade Foundations
A slab-on-grade foundation is a concrete slab that rests on the ground with thickened edges under the walls. We prepare the base and the vapor barrier, place the steel and the plumbing sleeves, and pour and finish the slab so it is flat, strong and ready for framing.
- BaseCompacted fill and gravel
- BarrierVapor barrier beneath
- SteelMesh or bars with thickened edges
- FinishFlat and level for framing
What is included
- 1A well-prepared baseCompacting and grading the base is what keeps a slab from settling.
- 2Moisture protectionA vapor barrier goes under the slab where the plans call for it.
- 3Steel in the right placesReinforcement and thickened edges carry the loads.
- 4Flat and readyThe surface is finished so framing and floors go on easily.
From the first look to the finished surface
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- 1Review the plansWe look at the plans, the soil, the frost line and the site so the foundation is designed for the building and the ground.
- 2Excavate and formThe site is dug and graded, and forms and steel are set to the plans.
- 3Pour and consolidateConcrete is placed, consolidated and finished to the right levels so the foundation is strong and true.
- 4Cure and hand overThe foundation is cured, forms come off and the site is ready for the next trade.
Is this the right service for you?
- New homes on a level or gently sloped lot
- Garages, workshops and additions
- Builders who want one crew for the whole slab
- Projects that need a smooth interior floor
Common questions
What goes under a slab?
Usually a compacted base of gravel and a vapor barrier. The plans and the soil decide the details.
Can the slab be the finished floor?
Yes. A slab can be sealed, stained or polished and used as the finished floor.
Services that pair with this one
Monolithic Slab FoundationsA footing and a slab poured in one go, with a thickened edge, for an efficient, strong foundation.See the service CI-121Foundations
Basement Floors and SlabsFlat, dry, finished basement floors poured over a prepared base, ready to live on or to finish.See the service CI-101Flatwork
Concrete DrivewaysDriveways built for heavy traffic and harsh weather, with the strength, drainage and curb appeal to match your home.See the service Find your city
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