If you're dealing with a compact bathroom and need to fit in a washing machine without sacrificing style or space, this smart DIY solution is for you. By building a custom countertop that extends over two lightweight concrete block walls, you can create a dedicated recess for your appliance while also gaining a handy service counter and sink area. This project is perfect for home improvers looking to maximize every inch of their home improvement space.
Positioning the Countertop

The countertop rests on two small walls made of aerated concrete blocks (also known as cellular concrete). These blocks are easy to cut and shape, making them ideal for garden supplies and indoor projects alike. The distance between the walls should be precisely measured to accommodate your washing machine. Use a strong adhesive sealant to bond the countertop to the block walls. On the side wall, support the countertop with an L-shaped metal shelf bracket, secured to the wall with a couple of wall plugs.
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Cutting the Sink Opening
Using a jigsaw, cut an opening in the countertop that matches the shape and size of your chosen sink. Run a bead of adhesive sealant around the edge of the cutout to secure the sink in place. This step ensures a watertight fit, especially important if you're pairing the sink with a bathroom vanity style unit.
Installing the Backsplash Guide Rail
Along the back edge of the countertop, screw on a metal guide rail. This rail will hold a shaped trim piece that bridges the gap between the countertop and the tiled wall. Cut the trim to the required lengths, mitering the corners at 45° for a clean, professional look. Snap the trim onto the guide rail to complete the installation.
Frequently Asked Questions
1. What tools do I need for this project?
You'll need a jigsaw, drill, screwdriver, measuring tape, level, and a trowel for applying adhesive. For cutting the concrete blocks, a hand saw or power saw with a masonry blade works well. You can find all necessary home improvement tools and supplies at GrandGoldman.
2. Can I use any type of countertop material?
Yes, but choose a moisture-resistant material like quartz, solid surface, or sealed granite. Wood countertops can work if properly sealed, but they require more maintenance. For a durable and stylish option, explore our kitchen islands and carts collection for inspiration.
3. How much space do I need between the block walls?
Measure your washing machine's width and add about 1-2 cm on each side for easy installation and ventilation. Standard washing machines are around 60 cm wide, so the gap should be approximately 62-64 cm.
4. Do I need to waterproof the block walls?
It's a good idea to apply a waterproof sealant or paint to the concrete blocks, especially in a bathroom environment. This prevents moisture damage and mold growth. Check out our home improvement section for suitable sealants.
5. Can I add storage above the washing machine?
Absolutely! You can install wall-mounted cabinets or open shelving above the machine for storing laundry supplies. For ideas, browse our bookcases and shelving units collection.
Additional Tips for a Professional Finish
- Ensure the floor is level before building the block walls. Use a spirit level to check.
- Allow the adhesive sealant to cure fully before placing the washing machine or sink.
- Consider adding a small rug in front of the washing machine to protect the floor and add comfort.
- For a cohesive look, match the countertop trim with your existing wall decor.
- If you plan to do more outdoor projects, our pergolas and gazebos collections offer great ideas for extending your living space.
By following these steps, you'll create a functional and attractive recessed washing machine area that blends seamlessly with your bathroom. For more DIY inspiration and quality products, visit GrandGoldman.com.
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