Skip to content
SURE Building Inspections
Defect type
High · 2–4/5

Deteriorated Ridge Capping Mortar

Roofing/real/pre–1970, 1970–2000, 2000–present/concrete tile roof, terracotta tile roof

Crumbling or cracked mortar bedding on ridge capping tiles allowing water entry along the roof ridge line. Extremely common in Perth homes due to intense sun exposure and thermal cycling.

Check my property for Deteriorated Ridge Capping Mortar Get area report

Causes

  • UV degradation and thermal cycling of mortar
  • Original lime-based mortar reaching end of life
  • Inadequate mortar mix or application

Symptoms to look for

  • Visible gaps between ridge capping and roof tiles
  • Loose or rocking ridge cap tiles
  • Mortar debris in gutters

Remedies

  • Rebed ridge capping with flexible pointing compound
  • Replace damaged ridge cap tiles
  • Apply flexible ridge cap adhesive system
Critical

Get an inspector through this property.

Findings in this category skew high severity. If you are under contract, we can usually book inside the cooling-off window. Every inspection includes 12 months of free advice.

Check my property for Deteriorated Ridge Capping Mortar → Browse the Pre-purchase building inspection
Same category

More from Roofing

All entries →
9,237 inspections
242,618 defects found
30,388 defect types
Local franchise owners
Head office backing

Built to last. Inspected to be SURE.

One inspection, twelve months of advice, and the same person on the other end of the phone every time you call. That is the part you do not see on the brochure.

Same-day reports (subject to access and availability) 12 months free advice Your inspector reads every report
Start my quote
Or call 1300 787 327 business hours support

9,237 inspections · 242,618 defects found · Inspector-owned franchises