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Why Has a Chip in My Laminate Worktop Exposed the Brown Core?

For a laminate worktop with a local chip through the decorative top layer that exposes the brown fibreboard core but has not yet swollen.

By Home ManualReviewed 6 September 2026Safety level S1UK guidance
Quick answer

What this usually means

A chip through laminate exposes the moisture-sensitive fibreboard underneath. Worktop Express recommends colour-matched laminate repair paste for small chips, while larger edge damage may need a replacement strip or worktop section. Keep the chip dry and repair it before repeated wiping or splashes cause the core to swell.

Likely causes

What may be causing this

1

A dropped object or impact broke the decorative layer

Clues: The damage is sharply localised and appeared after an impact.

What to do: Protect and repair the chip before water penetrates.

2

A sharp edge has progressively worn the laminate

Clues: The chip began at a corner or cut edge.

What to do: Remove the source of repeated impact and repair the exposed core.

3

Moisture has begun to undermine the laminate around an old chip

Clues: The edge of the chip is lifting or darkening.

What to do: Dry the area and assess for early swelling before filling.

Diagnose the pattern

How to check what is happening

Check whether the exposed core is still flat and hard
It is firm and dry.

A small cosmetic repair may still be suitable.

Look for raised edges or swelling
The chip is lifting around its perimeter.

Moisture damage is already progressing.

Check whether the chip is close to a sink or tap
It receives frequent splashes.

Prompt sealing is particularly important.

DIY decision

Can you fix this yourself?

A small dry chip can often be filled with a compatible colour-matched repair product. Swollen or extensive damage needs a fitter.

You'll usually need:
  • Colour-matched laminate repair paste
  • Plastic scraper
  • Cleaner recommended for laminate
Step by step

What you can safely try

  1. 1

    Dry the chip completely

    Do not trap moisture beneath repair material.

  2. 2

    Clean the damaged area

    Remove grease and loose fragments without enlarging the chip.

  3. 3

    Apply a compatible repair paste

    Follow the product instructions and avoid proud ridges.

  4. 4

    Keep the area dry while curing

    Prevent new water ingress until the repair has hardened.

Stop conditions

Call a kitchen fitter if…

  • The core is swollen, soft or crumbling.
  • The chip is growing into a crack.
  • The damage is beside a sink cut-out that is losing support.
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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 Repair a Chip in Laminate Kitchen Work SurfacesWorktop Express
  2. Laminate Kitchen Worktop Repair: A Nutshell GuideWorktop Express

Last reviewed: 6 September 2026. Home Manual updates review dates only when the substance of a guide is checked or changed.

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