Laying blocks on an uneven foundation can be a tricky task, especially if you don’t know the correct techniques. It requires the right tools, a good eye for detail, and a lot of patience. Whether you’re laying blocks for a new wall or replacing existing blocks, it’s important to understand how to properly lay them for a secure and stable structure. Fortunately, there are some helpful tips and tricks that can make the job easier.
In this blog post, we will be discussing the proper steps to lay blocks on an uneven foundation, as well as tips and tricks to ensure the job is done right. Read on to learn more about this important home improvement task.
Also Read: Ways to fix a basement foundation to eliminate damp/wet basements
Tools and material you require
When preparing to lay blocks on an uneven foundation, it is important to gather the necessary tools and materials. To make sure the job goes as smoothly as possible, here is a list of tools you will need:
- String – This will be used to draw a straight line for where your blocks should go.
- Stakes – You will need a few stakes to hold the string in place while you work.
- Tape measure – A tape measure will be helpful when measuring out the space between blocks and the distance from the edge of the foundation.
- Hand tamper – Use this tool to compact the ground before you start building your foundation.
- Straight piece of scrap lumber – This will come in handy when you need to check if your blocks are level or not.
- Crushed gravel – Place this material at the bottom of the foundation as a base layer.
- Masonry glue – Use this glue to attach blocks together and ensure that they stay in place.
- Caulk gun – You may need to use a caulk gun for filling any cracks or gaps between blocks.
Steps to lay concrete blocks on slope or uneven foundation
Marking and digging the base for blocks
The first step is to mark the location for your blocks. Use a level or straight edge to make sure the location is even, then measure the size of the blocks you will be using.
Once you have marked the location and measured the blocks, you will need to dig a trench that is half the height of the block plus an additional 7 inches. Make sure this trench is slightly wider than the blocks so they fit easily in place. Use a shovel and pick axe to dig the trench. You may need to use a small sledgehammer to break up any particularly tough spots. Make sure to remove all dirt and debris from the trench before moving on to the next step.
Compact the base and add gravel
Once you have marked and dug the base of the trench, it’s time to compact the ground before laying the blocks. To do this, you’ll need to use a hand tamper. This tool is used to compress the soil and create an even base for the blocks. Begin by compressing the soil in the bottom of the trench. Make sure it is evenly compressed throughout the entire area where the blocks will be laid.
After compacting the soil, it is important to add a layer of crushed gravel before laying your blocks. This layer of gravel should be at least six inches thick. Use the hand tamper once more to compact this layer of gravel before laying the blocks.
Finally, lay down a layer of geotextile fabric over the top of the gravel. This will help keep the gravel in place and create a more solid foundation for your blocks. Once the geotextile fabric is in place, you are ready to begin laying your blocks.
Lay the blocks
Now you’ve got the even base to lay the first set of blocks. So, set and stack the blocks side by side. With placing each block, make sure to check the levelness along the length. You can adjust the gravel underneath as necessary.
Well, the idea here is to have a leveled bottom of the trench to lay the first layer of block for the entire foundation. Your first layer of block must go below grade. Once you’ve got the first set of blocks completed, you can continue in the same pattern for the second row.
So, continue placing blocks way up to various levels on the slope or uneven ground. Make sure the block layers are staggered with joints.