Granite thresholds, also known as door saddles, are flat pieces of stone that create a smooth connection between two different types of flooring. They are often used in doorways, bathrooms, kitchens, and even outdoor areas. Installing a granite threshold can make your home look more polished and can also protect the edges of your flooring from damage.
Why Choose Granite Thresholds?
Granite is a popular choice for thresholds because it offers several benefits:
- Durability and Strength: Granite is a very strong stone that won’t warp, chip, or dent. It holds up well in busy areas and resists wear and tear. It is more durable than wood, marble, tiles, or most engineered stone options.

- Water Resistance: When properly sealed, granite thresholds are great for wet areas like bathrooms and kitchens. They help keep water from spreading and resist mold and mildew better than wood or marble.

- Stylish Appearance: Granite comes in many natural colors and patterns, adding a sophisticated touch to any space.
- Scratch Resistance: Granite keeps its smooth surface even with frequent use.
- Low Maintenance: Granite is easy to clean with just water and mild soap, and it doesn’t need constant refinishing like wood. Its long lifespan and minimal maintenance requirements help offset the initial investment.
Types of Granite Thresholds
Granite thresholds come in different shapes and finishes:
Edge Profiles
- Single Bevel: Sloped on one side, useful when only one side needs a smooth transition.
- Double Bevel: Sloped on both sides, commonly used in entryways. A standard bevel is typically 1/4 inch by 1/4 inch on two long sides.
Finishes
- Honed (Matte): Offers a smoother, less shiny look and provides better grip, which can be safer in wet areas.
- Polished: Has a high-gloss, shiny finish, making it ideal for decorative areas. However, polished granite can be slippery when wet.
Also Read , Benefits of Coffee Brown Granite Countertops
Tools and Materials
To install a granite threshold, gather these items:
- Measuring Tape
- Wet saw with a diamond blade (recommended for cutting granite). An angle grinder with a diamond blade can be used for smaller adjustments or edge trimming, but a wet saw is more precise for full-length cuts.
- Rubber mallet
- Notched trowel (for spreading adhesive)
Materials
- Granite threshold piece
- Thinset mortar for concrete or tile subfloors. This provides a robust and long-lasting bond.
- Latex-based adhesive for wood subfloors.
- It’s important to use a white modified thinset for natural stone to avoid chemicals bleeding through or discoloration.
- It is crucial to get 100% coverage with the adhesive to prevent cracking from movement or lack of support. Avoid using flexible glues or “spot bonding,” as they can lead to breakage.
- Caulk or grout.
- Sealant
Safety Gear (PPE)
- Goggles/eyewear are essential to protect your eyes from dust, debris, or sharp particles.
- Sturdy gloves help protect your hands from cuts, abrasions, and heavy or rough materials.
- Steel toe boots are necessary to shield your feet from heavy falling objects or sharp materials on the ground.
- A hard hat provides extra protection for your head, especially when handling or working around heavy materials.
Looking to upgrade your interiors? Check out the best granite floor designs for modern and timeless appeal.
Step-by-Step Installation of Granite Threshold
1. Removing the Old Threshold
If there’s an old threshold (wood or marble), remove it carefully using a pry bar and hammer. Be gentle to avoid damaging nearby flooring. Thoroughly clean the area to remove any old adhesive or debris.
2. Measuring and Preparing the Space
Measure Accurately: This is crucial to avoid waste and ensure a perfect fit.
- Length: Measure the length of the doorway from one jamb to the other. Leave a small expansion gap if necessary.
- Width: Choose a width that will effectively cover the transition between both types of flooring.
- Height: Measure the difference in height between the two floors to ensure the threshold provides a smooth transition and avoids tripping hazards.
3. Cutting the Granite Threshold
Measure and Mark
Carefully mark your cutting lines on the granite threshold. You can place painter’s tape across the marked lines before cutting to help achieve cleaner cuts and prevent chipping. Double-check your measurements before cutting, as even a slight miscalculation can result in an uneven fit.
Make the Cut
- A wet saw with a diamond blade is the best tool for clean, precise cuts. The water keeps the blade cool and reduces dust.
- If you’re using an angle grinder, it’s generally only for minor adjustments or edge trimming, not full-length cuts.
- When cutting, don’t apply too much pressure; move at a steady pace.
- After cutting, smooth the edges with a sanding block or stone polishing pad to give it a finished, professional look. Ensure the marble is dry before installation.
Also Read, Top Indian Granites colors for your Bathroom
4. Installing the Threshold
Dry Fit
Always place the granite threshold in position without any glue first. This allows you to check for a perfect fit, alignment, and any uneven edges, so you can make adjustments beforehand
Apply Adhesive
- For concrete or tile subfloors, use thinset mortar
- For wood subfloors, use a latex-based adhesive. A white modified thinset is specifically recommended for natural stone, especially to plywood, as it is less likely to bleed through and discolor the stone.
- Spread the adhesive evenly across the entire area where the threshold will sit using a notched trowel. It’s crucial to get 100% coverage to ensure proper support and prevent cracking over time. Avoid “spot bonding” or flexible glues.
5. Grouting or Caulking
If there are gaps between the threshold and the adjacent walls or floors, you can fill them for a seamless finish. Choose a caulk or grout color that complements your flooring or threshold. Smooth the joints with a wet sponge or fingertip for a professional look.
6. Cleaning and Curing
- Immediately clean off any excess mortar or adhesive from the granite surface with a damp cloth.
- Allow the installation to settle for at least 24 hours without heavy pressure or foot traffic. This ensures a strong, lasting bond.
7. Sealing and Finishing
- Granite has tiny pores that can absorb liquids, leading to stains or unpleasant odors. Sealing protects the stone from stains, water, and makes cleaning easier.
- How to Know if it Needs Sealing: Spray some water on the granite surface. If the water soaks in and darkens the stone, it needs to be sealed. If the water beads up, it’s properly sealed.
Types of Sealers
- Penetrating sealers – provide invisible protection by absorbing into the stone.
- Enhanced sealers – deepen or enhance the color of the stone.
Penetrating sealers are recommended for granite as they protect without altering its natural appearance.
How to Apply
- First, make sure the surface is thoroughly clean and dry.
- Lightly shake the sealer and apply an even coat across the entire surface using a soft cloth or brush.
- Let it sit for about 3 to 5 minutes
- Apply a second coat and let it set for approximately 30 minutes.
- Using a microfiber cloth, wipe off any excess sealer until the surface is dry. If any spots dry with excess sealer, reapply some sealer to remove it.
- Allow the surface to cure completely for 24 hours after applying water or frequent use.
Conclusion
Granite thresholds, especially those made from absolute black granite, are durable, water-resistant pieces that enhance your home’s look and provide safe, seamless transitions between different flooring. Proper installation and sealing ensure they offer long-term value and lasting beauty.
Add Style, Strength, and Value to Your Space
Choosing the right stone can make all the difference in your project. At Lexus Stones, we offer a wide variety of textures, colors, and finishes that suit both traditional and modern designs.
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