Pouring Concrete Slabs for New Construction
· 6 min read
On a new build, the slab sets the schedule for every trade that follows. Getting it flat, square, and properly cured keeps framing, plumbing, and finish work on track.
Sub-grade and footings
Soil is compacted to a uniform density and footings are dug to the depth the plans and local frost line require. Soft spots get removed and replaced with compacted stone rather than filled with extra concrete.
Vapor barrier and reinforcement
A vapor barrier under the slab keeps ground moisture out of the building. Rebar or welded wire mesh is set on chairs so it sits inside the slab rather than lying on the ground where it does nothing.
Placing and finishing
Concrete is placed in a planned sequence so no cold joints form, then screeded, floated, and finished to the specified texture — broom finish for exterior traction, smooth trowel for interior slabs that will take flooring.
Control joints and curing
Concrete cracks; control joints decide where. Joints are cut early at planned spacing so shrinkage follows the line instead of wandering across the slab. Curing then keeps moisture in for the first days, which is when most of the strength develops.