Cinder Block Bench DIY: Step-by-Step Guide

Ever wanted to add a rustic touch to your outdoor space or create a durable seating option for your garage? Building a bench from cinder blocks is an affordable, eco-friendly, and surprisingly stylish DIY project that anyone can tackle. With just a few materials and some basic tools, you can create a functional and attractive piece of furniture that will last for years. Let's dive into the step-by-step process of how to build a bench from cinder blocks.

Before we begin, it's essential to gather the necessary materials and tools. You'll need standard 8-inch cinder blocks, which are inexpensive and widely available at home improvement stores. Additionally, you'll need gravel, sand, concrete mix, a trowel, a shovel, a wheelbarrow, and safety gear, including gloves and safety glasses. For the finishing touch, you can use outdoor paint or sealant to protect your bench and add a pop of color.

Planning and Preparation

Before you start building, it's crucial to plan the layout and dimensions of your bench. A standard cinder block bench is typically around 4 feet long and 18 inches deep, but you can adjust these measurements to fit your specific needs. Sketch a simple blueprint of your bench, including the number of blocks you'll need for each row and the desired height.

Once you have your plan, prepare the site where you'll build the bench. Clear the area of any debris and ensure it's level. If necessary, use a shovel to remove any high spots and fill in low areas with soil or gravel. This step is crucial for creating a stable foundation for your bench.

Creating the Base

Start by creating a level base for your bench using gravel and sand. Spread a layer of gravel about 2 inches deep across the prepared site to promote drainage and prevent the bench from settling into the ground. Then, add a layer of sand on top of the gravel, leveling it out with a rake or shovel. The sand will provide a smooth surface for the cinder blocks and help create a solid foundation.

Before you begin laying the blocks, it's a good idea to soak them in water for about 15 minutes. This step helps prevent the blocks from absorbing moisture from the concrete mix, which could weaken the final product. After soaking, allow the blocks to drain for a few minutes before using them.

Laying the First Course

Begin laying the cinder blocks in the pattern you've planned, using the sand and gravel base as a guide. For a standard bench, you'll typically start with a single layer of blocks, staggering the joints to create a more stable structure. Use a trowel to apply a thin layer of concrete mix between each block, ensuring they are securely bonded together.

As you lay the blocks, use a level to ensure they are even and aligned. If necessary, adjust the height of the blocks using shims made from small pieces of wood or cardboard. Once the first course is complete, allow the concrete to cure for at least 24 hours before proceeding with the next step.

Building the Bench Structure

After the concrete has cured, it's time to start building up the height of your bench. For a standard bench, you'll typically create two or three courses of blocks, depending on the desired height. Continue laying the blocks in the same staggered pattern, applying concrete mix between each block and using a level to ensure they remain even.

As you build up the height of the bench, you can also create additional features, such as backrests or armrests, by laying blocks on their sides or ends. To create a backrest, simply lay a course of blocks on their ends, perpendicular to the main bench structure. For armrests, lay blocks on their sides, creating a ledge that provides support for your arms.

Creating Comfortable Seating

To make your cinder block bench more comfortable, you can add a layer of padding or cushioning. One option is to fill the hollow cores of the cinder blocks with concrete and embed a piece of rebar or wire mesh to create a solid surface. Alternatively, you can build a wooden seat that rests on top of the cinder block structure, providing a more comfortable and attractive seating option.

If you choose to build a wooden seat, you can use pressure-treated lumber to create a simple frame that fits on top of the cinder blocks. Attach a piece of plywood or composite decking to the frame to create a solid, waterproof surface for seating. Secure the wooden seat to the cinder block structure using screws or bolts, ensuring it is level and stable.

Finishing Touches

Once your bench is complete, it's time to add the finishing touches that will make it both functional and attractive. Start by applying a coat of outdoor paint or sealant to the cinder blocks, protecting them from the elements and adding a pop of color. Allow the paint to dry completely before using the bench.

To make your bench even more inviting, you can add cushions or pillows to the seating area. Choose outdoor fabrics that are durable and easy to clean, ensuring they will withstand the elements and maintain their appearance over time. You can also add decorative touches, such as planters or lanterns, to create a welcoming atmosphere around your bench.

Now that you've learned how to build a bench from cinder blocks, it's time to gather your materials and get started on your DIY project. With a little creativity and some elbow grease, you'll soon have a durable, attractive, and eco-friendly seating option that you can enjoy for years to come. Happy building!