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  • Surveys Explained

Common Roof Defects and Problems

  • July 30, 2026
  • 6 min read
  • By Thistle Surveying
  • Quick Answer
The most common roof defects include slipped or missing tiles, failed flashing around chimneys, blocked or broken guttering, and sagging or damaged roof timbers — all of which can let water into the home.

Why Roofs Matter

The roof is your home’s first line of defence against the weather. Small defects can quickly lead to water ingress, damp and costly structural damage if left unchecked.

The Most Common Roof Defects

During our surveys we frequently identify a number of recurring roof problems.

  • Slipped, cracked or missing tiles and slates
  • Failed or missing flashing around chimneys and valleys
  • Blocked, leaking or broken guttering and downpipes
  • Sagging ridge lines or damaged roof timbers
  • Defective or deteriorating flat-roof coverings

How Drone Surveys Help

Many roof defects are difficult to see from the ground. A drone roof survey captures high-resolution imagery of the entire roof safely and without scaffolding, making it easier to identify problems early.

Frequently Asked Questions

How often should a roof be checked?
It is sensible to have your roof inspected every few years and after major storms, or before buying a property.
Yes — our drone roof surveys allow safe, detailed inspection of the whole roof without the need for scaffolding.
Minor repairs are usually inexpensive, but neglected defects can lead to far more costly damage, so early detection pays off.

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Common Roof Defects and Problems

For most modern homes in reasonable condition, a RICS Level 2 Home Survey is sufficient.

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