Are granite tiles water-resistant? Well, that's a question I get asked a lot as a granite tiles supplier. And the answer is a bit more complex than a simple yes or no. Let's dive in and explore this topic in detail.
First off, granite is an igneous rock formed from the slow crystallization of magma below the Earth's surface. It's composed mainly of quartz, feldspar, and mica, which gives it some unique properties. One of the great things about granite is its natural density. This density plays a huge role in its water resistance.
Granite has a relatively low porosity. Porosity refers to the amount of empty space within a material. The lower the porosity, the less water the material can absorb. Most granite tiles have a porosity of less than 0.5%, which means they're pretty good at keeping water out. When water comes into contact with a granite tile, it tends to sit on the surface rather than soaking in immediately.
However, saying that granite tiles are completely water - resistant is a bit of an overstatement. While they can resist water to a large extent, they're not impervious. If water is left sitting on the surface of a granite tile for a long time, especially in areas where there are microscopic cracks or pores, it can start to seep in. Over time, this can lead to problems like staining, discoloration, or even the growth of mold and mildew in extreme cases.
Let's talk about different applications of granite tiles and how water resistance comes into play.
Interior Flooring
When it comes to Honed Granite Tile Flooring in your home, water resistance is crucial, especially in areas like kitchens and bathrooms. In kitchens, spills are inevitable. Whether it's water from washing dishes or juice from a knocked - over glass, you want a floor that can handle it. Granite tiles are a great choice here. A quick wipe - up usually takes care of any spills, and as long as you don't let standing water pool for too long, the tiles will remain in good condition.


In bathrooms, you have to deal with not only water splashes from the sink and shower but also high humidity. The water resistance of granite tiles helps prevent water from seeping into the subfloor, which could cause damage over time. However, it's still a good idea to seal the granite tiles periodically. Sealing creates an extra layer of protection on the surface, reducing the chances of water absorption and making the tiles even more resistant to stains.
Exterior Use
For Exterior Granite Wall Cladding or outdoor flooring, the tiles are exposed to the elements. Rain, snow, and even dew can all come into contact with the tiles. Granite's natural water - resistant properties make it a popular choice for exterior applications. But again, it's not invincible. In cold climates, water that gets into the pores of the granite can freeze and expand. This expansion can cause the tiles to crack over time.
To mitigate this risk, proper installation and maintenance are key. During installation, make sure there's proper drainage so that water doesn't pool around the tiles. And just like with interior tiles, sealing the exterior granite tiles can significantly enhance their water resistance and durability.
Cladding Panels
Granite Cladding Panels are often used to add a touch of elegance to buildings. Whether it's on the exterior of a commercial building or the interior of a high - end home, water resistance is important. On the exterior, the panels need to withstand rain and wind. On the interior, they may be exposed to water from cleaning or in areas with high humidity.
The water - resistant nature of granite helps keep the panels looking good for a long time. It prevents water - related damage such as peeling, warping, or the growth of unsightly mold. But remember, regular inspections and maintenance are necessary to ensure that the panels remain in top condition.
How to Test Water Resistance
If you're considering buying granite tiles, you can do a simple water test. Place a few drops of water on the surface of the tile and leave it for about 10 - 15 minutes. If the water beads up and doesn't soak into the tile, it's a good sign that the tile has good water - resistant properties. If the water starts to spread and soak in, it might be a tile with higher porosity and may require more frequent sealing.
Maintaining Water Resistance
As I mentioned earlier, sealing is a crucial part of maintaining the water resistance of granite tiles. Sealing products are available in both penetrating and topical forms. Penetrating sealers soak into the pores of the granite, creating a barrier from the inside out. Topical sealers form a protective layer on the surface of the tile.
How often you need to seal your granite tiles depends on several factors, such as the type of sealer used, the amount of traffic the area gets, and the level of water exposure. In general, interior tiles may need to be sealed every 1 - 3 years, while exterior tiles may require sealing every 6 months to 2 years.
In conclusion, granite tiles are generally water - resistant, but they're not perfect. Their natural density gives them a good level of protection against water, but proper care and maintenance are essential to keep them looking great and functioning well. Whether you're using them for interior flooring, exterior cladding, or cladding panels, understanding their water - resistant properties and how to maintain them will ensure that your investment in granite tiles lasts for a long time.
If you're interested in purchasing high - quality granite tiles for your project, I'd love to have a chat with you. We can discuss your specific needs, the best types of tiles for your application, and how to ensure their long - term water resistance. Feel free to reach out and let's start the conversation!
References
- "Granite: A Natural Stone Resource" by the Natural Stone Institute
- "The Science of Stone Tiles" by Tile Council of North America





