Shed foundations are available in different sizes, shapes, and styles. This is perhaps because of the need to accommodate different types of sheds. Regardless of the type, a foundation should retain stability, reduce rotting, and prevent damage from all possible angles.
Of all the different types of foundation, blocks seem to be the most common type. This is because using blocks is the easiest way to have a strong foundation for a storage shed. Well, there are different types of blocks available for shed’s foundation. Let us explore them and find out what are the pros and cons of each of them.
Solid Cement or Concrete Blocks
Many manufacturers prefer cement blocks for several of their shed kits, as they find them to be much satisfactory. These blocks retain a shed in well-maintained and pretty condition even after 35 years without compromising with their stable level. These blocks are developed in piers, which are up to 5 feet apart. Think of their operation holding a small tower that does not lean. If a shed is properly designed, its structure simply spans the piers. In case of block sets, consider a site that is not beyond two feet out of level.
In case of solid concrete blocks, the shed gets sufficient support by an evenly spaced, straight series. The exact spacing between blocks and the total number of blocks required are decided by considering the timber in use for joists and shed’s size. Solid concrete blocks are essential for such a base. This is because a hollow block such as normal wall block shall finally result in cracks and crushing under the shed’s weight.
A solid concrete block base behaves as a floor for a shed due to which there is no need to have a secondary floor. Further, it can endure abuse from wet tools, which is something that lumber floors cannot. This means such blocks are best for wet climates. Moreover, such a floor is far lower than a wooden base due to which it does not need a ramp for access. Above all, in case the base is dirty, cleaning is simply a breeze.
If the chosen site is dry and high, it is fine to place the blocks right on the ground. Still, if there is a chance of seeping rainwater, consider removing some grassy area under each block, make the soil dense with manual tampering, and make a shallow layer of gravel to cover the dirt prior to placing the blocks. This cover shall retain the soil underneath the blocks, facilitates drainage, and keeps sinking risk at bay.
Precast Pier Blocks
These blocks are similar to the solid concrete ones. However, they are not flat blocks but a set of pyramid-shaped blocks that support the floor frame of the shed. These blocks are for creating decks but are ideal even for sheds, provided the right ones are in use.
Some styles include blocks with a molded square hole into the top for holding a vertical post and flat wooden blocks for holding a joist. Dek block piers are common for shed bases. They can hold a post or a joist due to which they can rest on a badly inclining surface or a highly uneven site.