Chemicals
Showing results 1-5 of 5
Roof framing – borer
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High moisture content of timber
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Use of untreated timber or native sapwood timber
Timber boarding or plywood ceiling – clear finish is too dark
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Old varnished or shellacked ceiling has darkened with age
Ceilings – timber boards damaged by borer
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Untreated timber
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Damp environment
Timber boarding – borer infestation
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Use of untreated or sapwood timber
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High internal moisture levels
Bitumen-impregnated sheets – moss or lichen
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Insufficient cleaning
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The roof remains damp due to overhanging branches