Concrete Slabs & Pads in Binghamton, NY

Concrete slabs and pads are the plain workhorses of a property: the floor of a detached garage, the base under a shed, the pad that holds a hot tub or a generator. They do not need to look fancy, but they do need to stay flat. A shed on a pad that heaves will rack its doors out of square, and a hot tub on a soft base can crack its shell. In Binghamton, where Wikipedia's climate table puts January lows at 15.5 degrees on average, the ground under a slab freezes and thaws every winter, so the base and drainage decide how long it stays level.

Detached garage floors

On Binghamton's older lots, the garage is often a small detached building at the end of a short driveway, and many of those floors are cracked, sunken or partly missing. HomeGuide's slab guide puts a typical two-car garage at 400 to 576 square feet with reinforced concrete 4 to 6 inches thick. When we replace a garage floor we break out the old slab, dig out soft soil, compact a stone base and pour reinforced concrete pitched slightly toward the door so meltwater from the car runs out instead of pooling. Where the floor meets the driveway we place a joint so the two slabs can move independently.

Shed bases

HomeGuide notes that shed slabs are usually about 4 inches thick and often need no reinforcement. We still put them on a compacted stone base, because a shed pad sitting on bare soil is the one that tips after a few winters. We size the pad a little larger than the shed footprint so the walls sit fully on concrete, and set it high enough that water drains away from the door.

Hot tub pads

A filled hot tub with people in it is a heavy, concentrated load. HomeGuide's patio guide recommends about 6 inches of concrete with additional reinforcement under heavy items like hot tubs. We check the tub maker's requirements for flatness and size, plan the electrical path with your electrician before the pour if a conduit needs to pass under or beside the slab, and keep the pad level so the tub sits evenly.

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Equipment and utility pads

Generators, heat pump units, trash enclosures, firewood storage and trailer parking all do better on a small slab than on gravel or grass. These pads are quick pours, but they still need a base, the right thickness for the load and a slight pitch so water does not sit underneath the equipment.

What goes into every slab

• Excavation to firm soil, with soft or organic material removed
• Crushed stone compacted in layers
• Forms set to the slope and height you need
• Reinforcement sized to the slab and the load
• Air-entrained concrete for any slab exposed to weather
• Control joints so shrinkage cracks run in straight lines

Curing and timing

HomeGuide's slab guide says to wait about 1 to 2 days before walking on a new slab, 1 to 2 weeks before driving on it, and 28 to 48 days for a full cure. If a shed kit or a hot tub delivery is scheduled, we plan the pour so the slab has time to gain strength first. Many towns treat sheds and garages as building projects, so we check with your building department about what the structure itself needs.