Metal Shed Foundations
Posted By Sue on July 7, 2009
Metal Sheds Foundations
Small buildings and large structures a like begin with a foundation. Some of the preassembled sheds come with built in bottoms, but even in that case the shed needs a level surface to put it on.
When choosing a shed site, the first thing to consider is: where does the water flow? Choose a location where the water does not puddle or stand. Also, consider the run off from roofs and gutters. Water quantities are magnified when it is collected and then redirected. A downspout could easily flood a shed.
Next, the area where the shed it to stand should be raked clean. After leveling the site, fine gravel should be raked evenly across the surface staying about 2 inches deep. Additionally, gravel should also be extended at least 12” from the base of where the shed will sit, in all directions. This will provide additional drainage.
Another wise consideration to improve a shed is to pour a cement slab over the gravel that was just prepared. When pouring a slab the gravel should be about 4 inches thick. Typically anchor bolts are set in the cement and then the shed is set with the anchor bolts attached to the base of it.
A cement slab makes a structure more permanent. Also the things stored inside remain in better condition. The shed is also easier to sweep clean.
A cement slab is also a good choice for a very small shed with a built in bottom, such as many of the smaller PVC or vinyl sheds. Having a flat surface for it to sit on can prevent the bottom of the shed from cracking over time.
Whatever metal shed you choose, as with any form of construction, look to the base. Everything begins and ends with the foundation.
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