What a mattress warranty covers#

A mattress warranty typically covers manufacturing defects — problems that arise from the production process rather than normal use. Common covered defects include:

  • Body impressions (sagging) deeper than a specified threshold (typically 3–5 cm)
  • Broken or protruding springs
  • Seam splitting or cover defects not caused by misuse
  • Abnormal deterioration of foam materials

Common warranty exclusions#

What a warranty does NOT cover is equally important:

  • Stains or soiling: A stained mattress almost always voids the warranty entirely. This is why a mattress protector is non-negotiable.
  • Normal comfort changes: All mattresses soften over time. This is not a defect and is not covered.
  • Body impressions under the threshold: If the warranty specifies 4 cm and your impression measures 3.5 cm, you have no claim.
  • Incorrect base: Using the mattress on an unsuitable base (wrong slat spacing, missing support) can void the warranty.
  • Misuse or damage: Physical damage, burns, water damage or using the mattress as a trampoline is excluded.
  • Commercial use: Consumer warranties do not cover hotels, Airbnb or other commercial use.

What length warranty should you look for?#

  • 5-year warranty: Minimum acceptable for a quality mattress
  • 10-year warranty: Standard for mid-range and above
  • 15–20 year warranty: Found on premium mattresses (natural latex, Hypnos, Vi-Spring). These are genuine long-term commitments from the manufacturer.

Longer warranties are a signal of manufacturer confidence in their product. A brand offering only a 2-year warranty on a £700 mattress is telling you something.

It's important to understand that in the UK, your statutory rights under the Consumer Rights Act 2015 are separate from and can exceed the warranty provided. If a mattress develops a fault within six years (five in Scotland) that is not due to wear and tear or misuse, you may be entitled to a repair, replacement or refund regardless of what the warranty says. You cannot be stripped of statutory rights by a company warranty.

Keep your receipt, delivery confirmation and any product registration emails as evidence for any potential future claim.