Timber shingles/shakes – rotten shingles
Listed under: timber and wood-based, timber, Roof, cladding, durability, rot, roof cladding, timber shingles and shakes
Cause
Roof remains continuously damp due to insufficient cleaning or accumulation of debris such as leaves from overhanging branches
Repair
- remove debris and moss regularly by sweeping with a stiff bristle broom
- cut back overhanging branches that are shading the roof, and remove debris
- if the roof does not receive sunlight for periods of the year and may therefore not dry out fully, options include: replacing existing shingles with H4-treated pinus radiata shingles or cedar shingles; using stainless steel or silicone bronze nails to fasten cedar shingles; replacing shingles with an alternative roofing material
- if more than 10% of the shingles need replacing, the whole roof should be replaced. If the old shingle roof has met minimum Building Code durability provisions (it has lasted at least 15 years) a building consent is not required; if not, a consent must be obtained before reroofing. Reroofing with a different cladding type will require a consent.
Cause
Roof at the end of its serviceable life
Repair
- if more than 10% of the shingles need replacing, the whole roof should be replaced. If the old shingle roof has met minimum Building Code durability provisions (it has lasted at least 15 years) a building consent is not required; if not, a consent must be obtained before reroofing. Reroofing with a different cladding type will require a consent.