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Why Has My Quartz or Stone Worktop Chipped or Cracked Near the Sink or Hob?

For engineered-stone, quartz or similar worktops that develop a chip or crack close to a sink, hob, edge or cut-out.

By Home ManualReviewed 4 September 2026Safety level S1UK guidance
Quick answer

What this usually means

Quartz is durable but not indestructible. Damage around cut-outs and edges can follow impact, insufficient support, stress concentration or sudden extreme temperature change. Do not drill into the end of a crack or use household superglue as a structural repair. Photograph the damage, check whether the sink or hob remains securely supported and stop placing heavy or hot items near the crack. A stone-worktop fabricator can assess whether resin repair, reinforcement or replacement is appropriate.

Likely causes

What may be causing this

1

Impact has chipped an exposed edge or cut-out

Clues: A local chip follows a dropped pan or impact near the sink/hob edge.

What to do: Avoid further impact and have the chip assessed for professional resin repair.

2

The worktop is stressed by poor or changed support

Clues: A crack grows from a cut-out or spans an area above an unsupported cabinet gap.

What to do: Have the support and cut-out geometry inspected before cosmetic repair.

3

Extreme heat or thermal shock has stressed the surface

Clues: The crack or discolouration follows direct contact with very hot cookware or a high-heat appliance.

What to do: Stop direct heat exposure and have the damage assessed.

Diagnose the pattern

How to check what is happening

Trace where the crack starts
It begins at a sink or hob corner

Stress concentration or support around the cut-out may be involved.

Check support from inside the cabinet without disturbing the slab
The worktop spans a large unsupported area or support has moved

Structural support should be corrected as part of the repair.

Look for a recent impact or heat event
Damage appeared immediately afterwards

Impact or thermal stress is a plausible trigger.

DIY decision

Can you fix this yourself?

Photographing the crack and checking cabinet support visually is reasonable. Grinding, drilling or structural resin repair of stone should be done by an experienced fabricator.

You'll usually need:
  • Camera or phone
  • Torch
  • Straightedge if useful
Step by step

What you can safely try

  1. 1

    Protect the damaged area

    Keep heavy loads and hot cookware away from the crack or chip.

  2. 2

    Record the crack

    Photograph the ends and measure whether it is growing.

  3. 3

    Check visible support

    Look inside the cabinet for missing or shifted support without lifting the slab.

  4. 4

    Contact a stone-worktop specialist

    Ask whether the damage is suitable for resin repair, reinforcement or replacement.

Stop conditions

Call a kitchen fitter if…

  • The crack is growing or the slab moves when lightly touched.
  • A heavy sink or hob is no longer securely supported.
  • A large piece is loose and could fall or cut someone.
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Evidence

Sources used for this guide

We prefer primary UK guidance, regulators and manufacturers for technical and safety-sensitive claims.

  1. How to Clean & Maintain Caesarstone QuartzCaesarstone UK
  2. Can you put hot pans on quartz or porcelain worktops?Caesarstone UK

Last reviewed: 4 September 2026. Home Manual updates review dates only when the substance of a guide is checked or changed.

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