You will probably buy two buildings in the life of one good pad. Pour it for the second one.
Here is the part nobody thinks about at the home center: the shed is the disposable half of this project. Sheet goods, thin framing, a roof that gets replaced. Fifteen or twenty years and most of them are tired. The concrete under it, built correctly, will still be flat and square when the second building goes up on it.
That flips how the money should be thought about. People size the pad down to the exact building on order and shave the base to save a little today, and then the shed leans, the doors bind, and the whole thing gets redone with a structure sitting on top of it. We pour outbuilding pads across Lakewood, from small side-yard slabs in Solterra to workshop bases on the bigger lots near Bear Creek and Applewood.
Walk any older block and you will find concrete pads carrying their second or third shed. The ones that made it were poured square, sat on drained base, and shed water off every edge. The ones that failed got dropped on scraped dirt because the building was already in the driveway and everybody was in a hurry.
Practically, that means building for the largest thing you might reasonably put there. If today it is a garden shed but a workshop is possible later, the extra base and the extra inch of thickness are nothing next to demolishing a good pad in ten years. The pad is also the one part you cannot upgrade in place. You can re-roof a shed, re-side it, replace the doors. You cannot slide a better base underneath it.
People ask us to add an inch of concrete when what they need is four more inches of packed rock. Room in the budget for only one? Go under. Concrete is stiff and strong, and it fails when the ground beneath stops supporting it evenly. A four-inch slab on a well-built, well-drained base outlasts a six-inch slab lying on soft dirt every time, and it is not close.
Thickness earns its keep when the load is real. A tractor, a UTV, a lift, a shop full of steel cabinets: those get more concrete and heavier steel. A building holding a mower and bags of soil does not need a bunker. Same logic on reinforcement. Mesh at mid-depth covers a light-duty pad, bar goes in when something heavy rolls in and out, and fiber helps with early shrinkage without replacing either.
| Timeline | Set on gravel or blocks | Set on a poured pad |
|---|---|---|
| First winter | Feels fine. Maybe a bit of rocking at one corner | Feels fine. Doors close the way they did on delivery day |
| Year three | One corner has settled. The double doors no longer meet in the middle | No change. You have stopped thinking about it |
| Year five | Gravel has migrated, the floor is damp, and mice have found the gap underneath | Sweep it out in spring. That is the maintenance |
| Year ten | Bottom plate is soft on the low side, siding dark where it wicks | Weathered a shade. Structurally identical to day one |
| Year fifteen | Building is done, and the site has to be rebuilt from the dirt up | Old building comes off, new one goes on the same slab, same anchor pattern |
Send the footprint and a photo of the spot. We will tell you what it needs and what it costs. (303) 569-4046.
Placement drives more of the price than size does. Flat ground within reach of the driveway is the easy version. A back corner up on the Green Mountain side, where the yard falls away and there is rock a foot down, becomes a cut-and-fill job with a low retaining edge before we ever talk about concrete. On the flats the ground is soft and moisture-sensitive, so the work goes into over-excavating and packing base that drains sideways instead of holding water against the slab.
Then water off the roof. Most sheds have no gutters, so the drip line lands right at the pad edge a few hundred times a year. We build fall into the slab and grade the ground away from all four sides. Skip that and the pad becomes a shallow bowl with a wooden building in it.
An unheated building lets the ground beneath it freeze as deeply as the open yard does, which is why drainage beats mass out here. Spring through October is straightforward and fall is our favorite. A small pad is easy to blanket, so winter work is realistic when the subgrade is not frozen. Book with your delivery date in mind. The truck bringing the building will not wait on a cure.
Half the pads we tear out were poured by somebody trying to shave the dirt work down to nothing. The concrete on top of them is usually fine. That is the frustrating part.Straight from the crew
Still unsure about something?
Call the crew at (303) 569-4046 and we will talk it through.
Get a free, no-obligation estimate from a crew that knows Colorado soil, Colorado weather, and how to finish concrete that lasts.
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