Cracks in granite around the sink...help!!
Why Do Granite Countertops Crack Around the Sink?
Granite countertops are a beloved choice for many homeowners due to their durability and aesthetic appeal. However, a common issue that arises over time is cracking around the sink area. Understanding the reasons behind these cracks can help in prevention and maintenance. Here are the two primary reasons why granite countertops may crack around the sink.
1. Rusting Steel Rods in the Sink Cutout Support
During the installation of granite countertops, especially around sink cutouts, installers often use steel rods to reinforce the stone bridge—the narrow strip of granite in front and behind the sink. These rods provide essential support to prevent the granite from breaking under its own weight or from daily use.
**How Rust Causes Cracks:**
- **Exposure to Moisture:** If the steel rods are not properly sealed, they can be exposed to moisture from the sink area.
- **Rust Expansion:** Over time, the steel rods may begin to rust. Rusting steel expands, exerting pressure on the surrounding granite.
- **Cracking the Stone:** The expanding rods push against the granite, causing it to crack around the sink.
**Prevention Tips:**
- **Proper Sealing:** It's crucial for granite fabricators to completely encase these steel rods in epoxy resin during installation, protecting them from moisture and rust.
- **Quality Installation:** Hiring experienced professionals ensures that reinforcement rods are correctly installed and sealed.
2. Added Pressure and Lack of Support Around the Sink
The area around the sink cutout is inherently weaker due to the reduced amount of supporting material.
**Causes of Pressure-Induced Cracks:**
- **Standing on Countertops:** Placing excessive weight on the countertop near the sink, such as standing or kneeling, can stress and crack the granite.
- **Heavy Objects:** Setting heavy kitchen appliances or objects near the sink area can add undue pressure.
**Why This Area is Vulnerable:**
- **Minimal Support:** The sink cutout reduces structural integrity, making it more susceptible to stress.
- **Stress Concentration:** Additional pressure concentrates on the weakest points, leading to cracks.
**Prevention Tips:**
- **Avoid Excessive Weight:** Do not stand or place heavy items on the countertop near the sink.
- **Additional Support:** Ensure that the countertop is properly supported during installation, possibly with extra brackets or supports around the sink area.
Conclusion
Cracks around the sink in granite countertops are primarily due to rusting steel reinforcement rods and added pressure on a structurally weaker area. Proper installation, including sealing steel rods with epoxy resin and reinforcing the sink cutout, is essential to prevent these issues. Additionally, being mindful of how you use your countertops can extend their lifespan and keep them looking beautiful for years to come.
Call or visit Slabworks today to see if your cracked granite near your sink can be repaired!
Slabworks 5516 Caterpillar Dr Apex, NC 919-355-8484