What is the water absorption rate of a quartz counter top?
Jul 24, 2025
Hey there! As a supplier of Quartz Counter Tops, I often get asked about the water absorption rate of these countertops. It's a crucial factor to consider when choosing a countertop for your kitchen or bathroom. In this blog, I'll break down what the water absorption rate of a quartz countertop is, why it matters, and how it compares to other materials.
First off, let's talk about what water absorption rate means. Simply put, it's the amount of water a material can absorb when it's submerged or exposed to moisture over a certain period. For quartz countertops, this rate is extremely low. Quartz is an engineered stone made up of about 90 - 94% natural quartz crystals, with the rest being resins and pigments. These resins act as a binder, creating a dense and non - porous surface.
The low water absorption rate of quartz countertops is a huge advantage. When a countertop has a low water absorption rate, it's less likely to stain. You know how annoying it is when you spill coffee or red wine on your countertop, and it leaves a permanent mark? Well, with a quartz countertop, that's much less of a concern. The water and the substances in those spills just sit on the surface, and you can easily wipe them away before they have a chance to seep in and cause a stain.
Another benefit is that it's more resistant to mold and mildew. Bathrooms and kitchens are high - moisture areas. If a countertop absorbs water, it creates a damp environment inside the material, which is a perfect breeding ground for mold and mildew. But since quartz countertops have such a low water absorption rate, there's no place for the moisture to get trapped, so you don't have to worry about these unsightly and unhealthy growths.
Now, let's compare the water absorption rate of quartz countertops to other popular countertop materials. Granite, for example, is a natural stone. While it's a beautiful and durable option, its water absorption rate is generally higher than that of quartz. Granite can absorb between 0.2% and 1.7% of water, depending on its porosity. Marble, another natural stone, has an even higher water absorption rate, typically ranging from 0.1% to 0.5%. This means that both granite and marble are more prone to staining and mold growth compared to quartz.
Laminate countertops are also commonly used. They're more affordable, but their water resistance is not as good as quartz. Laminate can absorb water around the edges or where there are any small scratches, which can lead to swelling and delamination over time.
So, how do manufacturers measure the water absorption rate of quartz countertops? They usually follow a standard test method. The countertop sample is first dried in an oven to remove any existing moisture. Then, it's weighed. After that, the sample is submerged in water for a specific period, often 24 hours. Once the time is up, the sample is taken out, wiped dry, and weighed again. The difference in weight before and after the water immersion gives the amount of water absorbed, and this is then calculated as a percentage of the original dry weight.
As a Quartz Counter Top supplier, I can tell you that the water absorption rate of our products is well below 0.02%. This is an incredibly low rate, which means our countertops offer top - notch protection against stains, mold, and mildew.
If you're in the market for a new countertop, I highly recommend considering quartz. We offer a wide range of options, like the Calacatta Composite Solid Surface Quartz Bathroom Countertop, which combines style and functionality. Our Quartz Stone Tops are also a popular choice, available in various colors and patterns to match any kitchen or bathroom decor. And for those who prefer a classic look, our Bathroom White Quartz Top is a great option.


Whether you're a homeowner looking to renovate your kitchen or a contractor working on a new project, our quartz countertops are a reliable choice. If you're interested in learning more or want to start a purchase negotiation, feel free to reach out. We're always happy to answer your questions and help you find the perfect countertop for your needs.
References
- ASTM C97 - 16, Standard Test Methods for Absorption, Bulk Density, Apparent Porosity, and Apparent Specific Gravity of Dimension Stone.
- Various industry research papers on countertop materials and their properties.
