DIY Builds
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How do you make a shed base with uneven ground?

From experience, the simplest way to build shed bases on uneven ground it to use a foundation of blocks, ideally concrete. This way, to compensate for higher or lower ground on one side you can add or remove blocks to make a level base.

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When purchasing a shed, you firstly need a base. For most people, that is no issue due to a flat garden. However, some gardens are not always flat and have gradients, that’s when installing shed bases becomes a little trickier. From experience, the simplest way to build shed bases on uneven ground it to use a foundation of blocks, ideally concrete. This way, to compensate for higher or lower ground on one side you can add or remove blocks to make a level base.

Tools Required -

Spade

Measuring tape

Masonry Blocks

Pea Gravel

Treated Timber Planks

Marking posts

ribbon

Building a shed base on uneven ground

Firstly, start by marking out how big your shed is, this way you can be accurate as to where to place blocks. Use posts and position in the square using ribbon to keep in line. Take your spade and gently dig the top layer attempting to get the ground as flat as possible. Clear any excess soil to one side. Now, take a measuring tape and measure 4 rows of 3 blocks, this will create efficient weight distribution. Underneath each block, dig approximately 2 inches wider than your blocks and around 6 inches deep and fill the hole with pea gravel until it gives a flat surface. The pea gravel acts as a water distribution method but maintains vigour. Take your timber planks and place them along the rows of blocks and measure how flat it is. From there you can add or remove blocks if there is a serious height issue. If its a matter of minor size difference, grab some pieces of shingle and place underneath the timber post until its completely level. Continue to do this until all 4 posts are level and level with each other. Once you are happy that your shed base is level, you can continue to place your shed base on top. Start from one end and nail or screw the base on top of your timber panels, This will produce a rigid and sturdy overall base for you the place your shed on top of. Without a flat surface, your shed will not be able to function properly and can break, damaging you and your items inside and also, your wallet. Constructing, a flat shed base, even if it is on uneven ground, is incredibly important. If you'd like to know how to build a wooden base, take a look at our video below: Remember, many of our wooden sheds can be used in conjunction with wooden bases; these are listed in the 'Essential Extras' tab on the product pages.

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Set Rebar on Chairs Rebar that's lying on the ground does no good whatsoever. Placing the rebar grid on chairs will ensure it stays centered in the slab. Chairs come in different sizes so the height can be customized to the thickness of your slab.

Every editorial product is independently selected, though we may be compensated or receive an affiliate commission if you buy something through our links. Ratings and prices are accurate and items are in stock as of time of publication. A concrete driveway should last for decades if it’s properly installed. Good finishing techniques will make a slab look great for a while, but proper ground prep will keep your concrete crack-free for years. Here are some great tips on how to prepare the site for a pour.

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Construction Pro Tips

A Good Base Is Everything!

Concrete will crack and crumble if it’s not poured over a solid, stable base. Bringing in 4 to 6-in. of a good compact-able base is a good rule of thumb, but the exact amount of base a concrete driveway needs depends on the condition of the existing soil, the climate, and what you plan to park on your driveway. You may be able to pour directly over sandy or gravelly soil without bringing in any additional base. But if you live in a cold climate, are pouring over heavy clay or organic soil, or plan to park heavy vehicles on the driveway, you may want to increase the base layer to 10 or 12-in. The best way to find out how much base you need is to contact the nearest concrete supplier. If you explain your soil conditions and the slab’s intended use, the supplier should be able to recommend the proper base depth and the type to use and provide contact info for a nearby base supplier. Your municipality may also have a handout of recommended base depths in your area.

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