Creating a bench using cinder blocks and 4x4 posts is a simple and affordable project. The supplies needed include six cinder blocks and one 10-foot 4x4 post, cut in half. We recommend using cedar wood for a durable and attractive finish.
Once you have gathered all the required materials, start planning out the dimensions of the bench. Can't visualize? Use a layout board or painter's tape to mark the placement of the blocks. Remember to consider the slope of the area if you're placing your bench outside. Sand not only your posts with an orbital sander, but also the edges of the cinder blocks for safety.
Start by laying out three blocks on either side of your planned bench area. Make sure they are aligned and level with each other. If instability is an issue due to being on a slope, consider preparing the ground beforehand.
Apply an all-purpose adhesive like DAP INF filler or SikaBond Construction Adhesive on the top of these blocks and stack three more blocks on each side. These adhesive will not only help to secure your blocks but will also remain elastic, accommodating natural movement and enhancing the stability and durability of the bench.
Finally, feed each half of your post through the top openings of each cinder block set. Remember to apply adhesive on block edges to secure the posts in place. Again, it may seem like the gaps between the posts are larger than expected. Don't fret! This will be less noticeable after the bench is completely assembled.
Seal the cinder blocks using Zinsser Bulls Eye 1-2-3 primer before painting. This will ensure that the paint adheres properly to the surface and increases its durability. After the primer has dried, paint the blocks with Krylon ColorMax acrylic latex paint in flat white. This paint is suitable for both indoor and outdoor use, providing flexibility if you decide to move the bench indoors.
Now, onto the posts. A semi-transparent wood sealer such as Thompson Water Seal in natural cedar color will not only enhance the look of the bench but also protect the wood from weathering and decay. An all-weather stain and sealer is another great option to provide more protection.
Patio cushions or a custom upholstered foam padding will not only provide comfort when sitting but also prevent sinking into the gaps between the posts. Whether you want to take a rest, read a book, or enjoy star gazing on this bench, these cushions will surely enhance your experience.
This DIY project will cost around $107. The cinder blocks and posts alone will only amount to $33, the rest would be the cost of paint, sealers, and adhesive. In under an hour, you'll have a cost-effective and attractive addition to your outdoor space. You can also turn this bench into a backrest bench by using more cinder blocks and an additional post. Whether for aesthetics or practical reasons, with a little imagination and hard work, the possibilities are endless!
