When you are investing thousands of pounds in a worktop the thought of it chipping or cracking is understandably concerning. The good news is that quartz is one of the most damage-resistant materials you can put in a kitchen. Chips and cracks are genuinely rare when the worktop is properly installed and used as intended.

At Precious Marble we have installed thousands of quartz worktops across Bedfordshire over the past 15 years. The number of callback requests for chipping or cracking is extremely low. When damage does occur there is almost always a clear cause. This guide explains what those causes are and how to avoid them.

How Tough Is Quartz Really

Quartz is an engineered stone made from approximately 90-94% ground natural quartz crystals. Quartz mineral is one of the hardest naturally occurring materials on the planet scoring 7 on the Mohs hardness scale. For context diamonds score 10, steel scores around 4.5 and granite scores 6 to 7.

The combination of hard quartz crystals and flexible polymer resin creates a material that is both incredibly hard and slightly flexible. This flexibility is important. A completely rigid material is more prone to cracking under sudden impact. The resin gives quartz just enough flex to absorb minor shocks without fracturing.

What Causes Quartz to Chip

Chipping is the more common of the two types of damage. It almost always occurs at edges and corners rather than on the flat surface area. Here are the most common causes we see.

What Causes Quartz to Crack

Cracking is far less common than chipping. When it does occur it is typically caused by one of these factors:

• Unsupported overhangs. If a section of quartz extends beyond the cabinet support without adequate reinforcement the weight of the overhang plus any downward pressure (someone leaning on it) can create a stress fracture. Overhangs beyond 300mm typically need support brackets or corbels.
• Uneven cabinets. If the cabinets beneath the worktop are not level or if there are gaps in the support the quartz can flex under pressure and crack at the unsupported point. This is an installation issue not a material defect.
• Thermal shock. Placing a very hot pan directly from a high flame onto a cold quartz surface creates a sudden temperature differential. In extreme cases this can cause a stress crack radiating from the point of contact. Using trivets eliminates this risk entirely.
• Structural settling. In new-build properties the building can settle over time. If the kitchen structure moves or shifts after the worktop is fitted this can create stress on the quartz that leads to cracking. This is extremely rare and is a building issue rather than a worktop issue.

How to Prevent Chips and Cracks

• Choose a reputable installer. Proper installation with level cabinets and adequate support is the foundation. A skilled installer ensures the slab is fully supported along its entire length with no gaps or flex points.
• Support overhangs. Any overhang greater than 300mm should have support brackets. Breakfast bars and island overhangs are common areas where this matters.
• Be careful at edges. Avoid dropping heavy objects near the edges and corners of the worktop. Take extra care when loading and unloading heavy items from the oven or dishwasher near exposed edges.
• Always use trivets. Hot pans placed on trivets or heat mats eliminate the risk of thermal shock cracking entirely.
• Choose a rounded edge profile. A bullnose or pencil round edge is more chip-resistant than a sharp square edge because it has no vulnerable 90-degree corner.

Repair Options If Damage Occurs

If the worst does happen the good news is that quartz damage can usually be repaired without replacing the entire worktop.

For structural cracks that run across the slab the repair options are more limited. A professional can stabilise the crack to prevent it spreading. In severe cases a section of the worktop may need to be replaced. This is extremely rare with properly installed quartz.

At Precious Marble we take installation quality seriously because we know it is the best way to prevent problems down the line. If you want the peace of mind of a professional installation we supply and fit quartz worktops in Bedford with in-house teams who know the product inside out.

For more answers to common questions about quartz durability and care browse our full Quartz FAQ’s section.

Frequently Asked Questions

Related Questions

Browse all of our answers in the Quartz FAQ’s section for more expert guidance.