Asphalt shingles – missing or damaged ridge shingles

Causes

Wind has lifted the lower edges of shingles, particularly when the adhesive has become soft in warm weather 

Inadequate tab adhesion to the course below

The self-adhesive strip failed to fully adhere during cold weather installation

Listed under: adhesives and sealants, adhesives, Roof, cladding, roof cladding, asphalt shingles

Cause

Wind has lifted the lower edges of shingles, particularly when the adhesive has become soft in warm weather 

Repair

  • replace damaged shingles: lift adjacent shingles and remove the damaged shingle; insert new shingle. Fix the overlap edge with bituminous adhesive leaving 125 mm of the shingle exposed. Fasten each shingle mechanically on both sides – 140 mm from the exposed edge and 25 mm from the lower edge. Cover exposed nails with asphaltic plastic cement. Replace lifted shingles and bed tabs in extra bituminous adhesive

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Cause

Inadequate tab adhesion to the course below

Repair

  • replace damaged shingles: lift adjacent shingles and remove the damaged shingle; insert new shingle. Fix the overlap edge with bituminous adhesive leaving 125 mm of the shingle exposed. Fasten each shingle mechanically on both sides – 140 mm from the exposed edge and 25 mm from the lower edge. Cover exposed nails with asphaltic plastic cement. Replace lifted shingles and bed tabs in extra bituminous adhesive

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Cause

The self-adhesive strip failed to fully adhere during cold weather installation

Repair

  • replace damaged shingles: lift adjacent shingles and remove the damaged shingle; insert new shingle. Fix the overlap edge with bituminous adhesive leaving 125 mm of the shingle exposed. Fasten each shingle mechanically on both sides – 140 mm from the exposed edge and 25 mm from the lower edge. Cover exposed nails with asphaltic plastic cement. Replace lifted shingles and bed tabs in extra bituminous adhesive

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