DIY Concrete Kitchen Countertop with Kerdi-Board 2026

Looking for a fast, budget-friendly way to create a stunning kitchen countertop? By combining special extruded polystyrene foam panels (Schlüter®-KERDI-BOARD) with self-leveling cement mortar, you can achieve a sleek concrete finish without the heavy weight or high cost of traditional concrete. This DIY project is perfect for modern homes and can be completed over a weekend. For all your home improvement needs, GrandGoldman has everything from tools to finishing touches.

Using Kerdi-Board and Self-Leveling Cement for a Fast, Economical Countertop

We’ll walk you through building a concrete kitchen countertop using a special extruded polystyrene foam panel (Schlüter®-KERDI-BOARD), topped with a pour of self-leveling underlayment. This method is lightweight, waterproof, and surprisingly easy for DIYers. To complement your new countertop, explore our kitchen islands and carts for extra prep space.

Concrete Countertop with Kerdi-Board Panel

The KERDI-BOARD panel is made of extruded polystyrene foam, covered on both sides with a hardening layer and a non-woven fabric (a unique feature of Kerdi Board) that ensures perfect adhesion of the self-leveling mortar. Available in multiple thicknesses (5, 9, 12.5, 19, 28, 38, and 50 mm), Kerdi Board suits a wide range of applications. With proper techniques, you can seal joints and critical points, making the panel fully waterproof. For a cohesive look, pair your countertop with dining tables that match your style.

Step-by-Step: Concrete Countertop with Kerdi-Board

Materials Needed:

• Kerdi-Board panel (cut to size)
• Self-leveling cement mortar
• Aluminum edge strip (slightly raised, ~5 mm)
• Mixing paddle and drill
• Notched trowel or spatula
• Straightedge (for precise leveling)

Instructions:

1. Cut the Kerdi-Board panel to your desired countertop dimensions, and carve out a recess for the sink.
2. Attach an aluminum edge strip around the entire perimeter, raised about 5 mm above the panel surface, to contain the cement mortar and prevent spills.
3. Prepare the self-leveling cement mortar using a mixing paddle on a drill. The mix should be quite liquid and self-leveling for a smooth finish without excessive troweling.
4. Gently pour the mortar onto the Kerdi-Board panel and spread it evenly using a notched trowel or spatula.
5. For a more precise finish, run a straightedge across the surface to ensure even thickness and leveling.

Once cured, your concrete countertop is durable, heat-resistant, and easy to clean. Add lighting under cabinets or above the counter to highlight the modern texture. Don’t forget to update your wall decor for a complete kitchen refresh.

Frequently Asked Questions (FAQ)

1. Is Kerdi-Board waterproof?

Yes, when joints and critical points are properly sealed, Kerdi-Board becomes fully waterproof, making it ideal for kitchen countertops near sinks. For outdoor kitchen projects, check out our garden supplies and outdoor patio furniture.

2. Can I use this method for a bathroom vanity?

Absolutely! The same technique works for bathroom vanities. Browse our bathroom vanities for inspiration, and consider adding mirrors to complete the space.

3. What thickness of Kerdi-Board should I use for a countertop?

For standard kitchen countertops, 12.5 mm or 19 mm thickness provides a good balance of strength and weight. Thicker boards (28 mm or more) are better for larger spans or heavy use. Pair your countertop with sofas and rugs for a cozy living-dining combo.

4. How do I maintain a concrete countertop?

Seal the concrete with a food-safe sealer to prevent stains. Clean with mild soap and water. Avoid harsh chemicals. For more kitchen upgrades, explore curtains and TV entertainment furniture to style your home.

5. Can I use this technique for outdoor kitchens?

Yes, Kerdi-Board and cement are weather-resistant. For outdoor setups, consider BBQ grills and outdoor cooking supplies, outdoor heating, and outdoor lighting to create the perfect al fresco dining area.

For additional storage and organization, check out bookcases and shelving units, display shelving and étagères, and storage benches. Complete your bedroom with beds, mattresses, nightstands, and dressers. For your home office, browse desks and work surfaces and office chairs.

Browse Grand Goldman Home Decor

Discover unique craftsmanship home decor and furniture at the Grand Goldman Shop.

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