Granite is a natural stone known for its durability and heat resistance, making it a popular choice for kitchen countertops. However, while it can withstand high temperatures to some extent, it is not entirely impervious to heat damage. The exact amount of heat required to damage a granite countertop can vary based on factors such as the specific type of granite, its thickness, and any existing flaws or weaknesses in the stone.
Generally, granite can tolerate temperatures up to 1200°F (649°C) or even more for a short period without suffering significant damage. For example, placing a hot pot or pan directly on the granite surface briefly should not cause any issues.
However, sustained or excessive exposure to high temperatures can potentially lead to the following issues with granite countertops:
Thermal shock: Rapidly changing the temperature of the granite, such as placing a very hot object on a cold surface or vice versa, can cause thermal shock. This may result in cracks or fissures in the stone.
Discoloration: Prolonged exposure to high heat can cause certain minerals in the granite to change color or become discolored.
Weakening of sealants: If your granite countertop has been sealed, extremely high temperatures can weaken or damage the sealant, making the stone more susceptible to stains and other damage.
To protect your granite countertop from heat-related issues, it's essential to use trivets, hot pads, or heat-resistant mats when placing hot cookware on the surface. Avoid using the granite countertop as a cutting board for hot items, as well.
While granite is relatively heat-resistant, exercising caution and maintaining good practices will help preserve its beauty and durability for the long term. If accidental damage does occur, it's best to consult a professional to assess the severity and recommend appropriate repairs or replacements.