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Gable Roof

Two sloping sides forming a triangle — the UK's most common roof design

A gable roof has two sloping sides that meet at a ridge, forming a triangular end wall (the "gable"). It's one of the most common and simplest roof designs in the UK.

Common Damage

1. Tile or Slate Damage

  • Cracked, slipped, or missing tiles
  • Caused by wind, frost, or age
  • Leads to leaks if not fixed

2. Ridge Tile Problems

  • Ridge tiles at the top can loosen or fall off
  • Mortar can crack over time

3. Gable End Issues

  • Brickwork at the triangular end can crack
  • Wind exposure makes this area vulnerable

4. Roof Leaks

  • Water getting through damaged tiles or flashing
  • Often shows as damp patches in lofts or ceilings

5. Timber Rot

  • Occurs when water gets into the structure
  • Affects rafters and can weaken the roof

6. Flashing Failure

  • Lead or metal flashing around chimneys or joints can deteriorate

Repairs

minor Repairs

  • Replace broken or missing tiles/slates
  • Repoint ridge tiles (renew mortar)
  • Fix flashing around chimneys or valleys
  • Seal small leaks

moderate Repairs

  • Replace sections of roofing felt or battens
  • Repair small areas of timber damage
  • Rebuild part of the gable end if cracked

major Repairs

  • Structural timber replacement (rafters)
  • Large-scale retiling
  • Fixing severe sagging

New Installation

When Replacement Is Needed

  • Roof is 15–20 years old
  • Widespread leaks or sagging
  • Multiple repairs no longer effective

Installation Steps

  1. Remove Old Roof

    • Strip tiles, battens, and underfelt
  2. Inspect Structure

    • Check rafters and replace damaged timber
  3. Install New Structure

    • New rafters or trusses
    • Ridge beam fitted
  4. Add Layers

    • Breathable membrane (waterproof layer)
    • Battens (for fixing tiles)
    • Insulation (if upgrading)
  5. Install Roof Covering

    • Tiles, slate, or other material
  6. Finish Details

    • Ridge tiles fixed (often dry ridge system now)
    • Flashing installed
    • Gutters connected

Lifespan

Tiles / Slate
30–50 years
Felt / Membrane
10–20 years
Timber Structure
15+ years if kept dry

Warning Signs

  • Leaks or damp patches
  • Sagging roof line
  • Missing or slipping tiles
  • Daylight visible in loft

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