Can Heat Crack Quartz Countertops?

Quartz countertops are an increasingly popular choice for kitchen and bathroom remodels due to their durability, low maintenance, and stylish appearance. However, some homeowners wonder – can heat crack quartz countertops? The short answer is yes, quartz can crack from excessive heat exposure, but there are ways to prevent this from happening.

What Is Quartz?

Quartz countertops, sometimes referred to as engineered stone, are made from ground natural quartz crystals combined with resins and pigments. The end result is a hard, non-porous surface that resists scratches, stains, and heat better than many natural stone options.

While durable, quartz is not completely indestructible. Exposing quartz surfaces to excessive heat can cause the resins to break down, resulting in cracks or discoloration. Understanding the factors that can damage quartz will help you take proper care of your countertops.

How Heat Can Damage Quartz

Quartz has a high heat tolerance compared to other countertop materials. It can withstand brief exposure to temperatures up to 300°F before risks of damage occur. However, subjecting quartz to consistent high heat creates expansion and contraction that can cause the material to crack.

Hot Pans

Placing hot pans, especially cast iron, directly on a quartz countertop can create extreme concentrated heat. The sudden temperature change causes the quartz to expand unevenly, creating stress fractures in the material.

Cooking Appliances

Using quartz right next to a cooktop or beneath a wall oven without proper insulation puts the surface at risk of repeated high heat exposure. Over time, this can cause the resin to break down.

Hot Objects

Allowing any hot object – such as a curling iron, flat iron or hot pot – to sit on quartz can burn the surface. Prolonged contact will damage and discolor the countertop.

Preventing Heat Damage

While quartz can crack from heat exposure, taking a few simple precautions will help your countertops withstand years of regular use without damage:

Use Hot Pads

Always set hot pots, pans, and other objects on a hot pad or trivet. Never place them directly on quartz. Allow cookware to cool completely before touching the countertop.

Add Insulation

Insulate the edges of your countertop that meet cooktops, ovens, and dishwashers using a heat-resistant caulk. This prevents excessive heat transfer that could damage the quartz.

Avoid Thermal Shock

Prevent thermal shock by not exposing quartz to sudden and extreme temperature changes. Don’t pour boiling water on it or place frozen/hot items on the surface simultaneously.

Repair Damage

Inspect your countertops regularly for any cracks or discoloration. Early intervention increases the chances of successful repair by a pro.

Can Heat Cracks Be Repaired?

Minor heat damage like isolated small cracks or surface stains can often be repaired by an experienced countertop fabricator. They have the tools and materials to fill cracks and resurface discolorations.

However, excessive cracking from prolonged heat exposure may mean the quartz needs full replacement. The good news is quartz retains its value and often does not need full replacement of the countertop. Just the damaged section would need cut out and replaced.

Keep Your Quartz Looking Beautiful

Quartz offers superior resilience compared to natural stone and other countertop materials. While not impervious to damage, following simple precautions will help your quartz surfaces stay crack-free for years. Allow hot items to fully cool before setting them on quartz, use trivets or hot pads, and insulate your countertops from heat-generating appliances. With proper care, your quartz countertops will remain an elegant and durable foundation for your kitchen or bath.

Frequently Asked Questions About Heat Damage to Quartz Countertops

Can I cut food on quartz countertops?

Yes, it’s perfectly safe to cut food directly on quartz. The material is non-porous, so it won’t harbor bacteria. Just avoid cutting extremely hot foods that may suddenly expose the surface to high heat.

Is it OK to place a crockpot on a quartz countertop?

Crockpots can get hot enough to potentially damage quartz over time. Use a hot pad underneath the crockpot for protection.

Should I seal my quartz countertops?

No, sealing is not necessary for quartz. The material is non-porous, so liquids cannot penetrate the surface. Save your money – sealing agents will not improve durability.

Can I use quartz near a stove?

Yes, quartz holds up well near stoves if you install a heat-resistant edge treatment to prevent excessive heat transfer. Maintain a small gap between the countertop and stove for ventilation.

How long do quartz countertops last compared to other materials?

Quartz lasts longer than most materials. With proper care, expect around 15-20 years of beautiful performance before signs of aging occur. Granite may last 30+ years, while laminate lasts just 5-10 on average.


Quartz countertops bring stylish elegance and durability to kitchens and baths. While resistant to damage, exposing quartz to high direct heat can cause cracks over time. Safeguard your investment by using hot pads, adding insulation, avoiding thermal shock, and promptly repairing any damage that occurs. With simple care, quartz countertops will withstand years of regular use while maintaining their sleek, modern look.