The frequency for sealing granite countertops depends on several factors, including the type of sealant used, the color of the granite, and how heavily the countertops are used. As a general guideline, resealing is often recommended every 12 to 18 months, but some sources suggest it could be as often as every few months or at least once a year.

The type of sealant is a major factor: water-based sealants may need reapplication every six months to a year, while more durable solvent-based sealants can last for five to 10 years. Additionally, factors like heavy kitchen traffic, frequent use of acidic cleaners, and lighter granite colors may require more frequent sealing to prevent staining.

To determine if your countertops need resealing, you can perform a simple water test. Place a few drops of water or a wet paper towel on an inconspicuous area of the granite. After 10 to 15 minutes, check the spot. If the water has beaded up, the seal is still intact. If the water has been absorbed and darkened the stone, it's time to apply a new coat of sealant. You can choose to seal the granite yourself or hire a professional to ensure it's done correctly.

Undermount sinks have clips that attach to the countertop, but they have pros and cons. They are heavier than drop-in sinks, so they only work with sturdy countertops like natural stone and are a more expensive option. You might need someone to help you install the sink, depending on its weight.

Yes, onyx is more expensive than granite. Its higher cost is due to its rarity, delicate nature, and the specialized care it requires. While granite countertops typically cost between $2,000 and $4,000, onyx is considered a premium material. Its luxurious, translucent appearance and unique ability to be backlit also contribute to the higher price. In terms of durability, granite is a hard, durable surface, whereas onyx is more delicate and can be damaged if not handled carefully.

The cost to install a kitchen island can range from $900 to $6,500, with an average price of around $4,800 for most homeowners. The final cost depends on whether you choose a prefabricated or custom-built option. It is generally cheaper to buy a prefabricated island than to build one from scratch. A budget-friendly prefabricated cart can cost between $150 and $900, while a permanent prefabricated stationary island costs from $900 to $5,000. Custom-built kitchen islands average $4,800 but can cost $10,000 or more, depending on factors like materials, size, design complexity, and accessibility.