Countertop Thickness Guide: Standard, Mitered & Custom Options
Choosing the right countertop thickness isn’t just a design decision — it affects your budget, structural support, and overall aesthetic. Whether you’re remodeling a kitchen, upgrading a bathroom, or building an outdoor grill island, understanding your thickness options ensures a durable and stylish result.
Standard Countertop Thickness
In most Ontario homes, the standard thickness for stone countertops is either 2cm or 3cm. Each offers its own benefits depending on application and material:
- 3cm (1.25 inches): Ideal for quartz, granite, and quartzite. Offers maximum strength and doesn’t require plywood support underneath.
- 2cm (0.75 inches): Lighter and often used for vanities or modern minimalist designs. May need added support or build-up underneath.
Not sure which one fits your project? Explore our guide on Quartz Countertops for more insights on thickness and durability.
When to Choose a Mitered Edge
If you’re after a bold, modern look, a mitered edge might be for you. This design creates the illusion of a thicker slab (5–6cm or more) by wrapping the stone vertically at the edge — perfect for:
- Waterfall kitchen islands
- High-end bathroom vanities
- Outdoor kitchens and bars
For more creative design ideas, check out our Countertop Edge Profile Guide.
How Material Affects Thickness
Different materials perform best at specific thicknesses. Here’s a quick breakdown:
- Granite: Most stable at 3cm — naturally strong and durable.
- Quartz: Works well in both 2cm and 3cm options, offering versatility and design flexibility.
- Porcelain & ultra-compact surfaces: Typically 12mm thick but often mitered to appear thicker.
Design Trends in Countertop Thickness (2025)
According to our 2025 Countertop Trends Report, designers are favoring:
- Thicker mitered edges (5–6cm appearance)
- Integrated backsplashes made from the same slab
- Mixed thickness styles (e.g., thick island with slim perimeter)
Custom Thickness Options
Some homeowners prefer a custom look that blends both design and practicality. We offer build-ups, laminated edges, and layered installations that create visual depth without compromising strength or balance.
Our team can help you select the best thickness based on material, budget, and aesthetic goals.
Final Thoughts
The right countertop thickness depends on your design vision, functionality, and material choice. Whether you prefer a standard 3cm build or a bold mitered waterfall edge, our experts can help you achieve a balanced, durable, and high-end finish.
Book a consultation to see full-size samples and thickness options in person.