Plywood
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Plywood cladding – surface checking
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Thermal movement of timber
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Effect of weathering or UV deterioration
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Swelling/shrinkage due to moisture absorption
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Coating failure
Plywood cladding – delamination
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Thermal movement of timber
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Effect of weathering or UV deterioration
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Swelling/shrinkage due to moisture absorption
Plywood cladding – staining around nail holes
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Rust staining from mild steel or hot-dip galvanised nails
Plywood cladding – chalking paint
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Weathering, UV light exposure – chalking will be more visible with darker colours
Plywood cladding – fading paint
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Weathering UV light exposure – darker colours are more prone to fading
Plywood cladding – peeling or flaking paint/stain
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Thermal expansion and contraction of timber substrates
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Loss of adhesion due to excess moisture in substrate
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Poor initial substrate preparation
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Oil-based (alkyd) paint applied over water-based (acrylic) paint
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Surface was damp or dirty when painted previously
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Dark colours
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Timber swelling/shrinkage caused by moisture absorption into timber end grain if joints were not adequately primed before installation
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Coating at the end of its serviceable life
Plywood cladding – bubbling or blistering paint/stain
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A loss of adhesion due to excess moisture in the substrate
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Poor initial substrate preparation
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Oil-based (alkyd) paint applied over water-based (latex) paint
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Surface was damp or dirty when painted previously
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Dark colours increasing surface temperatures
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Timber swelling/shrinkage caused by moisture absorption into timber end grain if joints were not adequately primed before installation
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Water-based paint coat exposed to moisture before paint has fully dried
Plywood cladding – paint failure at base of walls
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Cladding covered by soil/foliage
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The back surface of boards too close to the ground, not sealed and absorbing moisture
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Concrete has been placed up to and against cladding
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High subfloor moisture levels behind the cladding
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Bottom of cladding too close to waterproof deck surface, apron flashing and absorbing moisture
Subfloor – deterioration of the underside of particleboard flooring
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The particleboard is too close to the ground
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The subfloor space is very damp
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There is a water leak from within the house
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There is a leak through wall cladding leak if the cladding is damaged
Timber board or plywood ceilings – black staining of timber
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Condensation and mould growth forming on ceiling
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Leak(s) from above the ceiling
Timber boarding or plywood ceiling – clear finish is too dark
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Old varnished or shellacked ceiling has darkened with age
Timber veneered MDF or plywood – damage
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Dents and scratches
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Clear finish deterioration
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Water stains
