Condensation
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Framing outline is visible on the cladding on cold mornings
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Condensation is forming on cladding where there is insufficient or no insulation
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Condensation forming at the framing locations when the wall is well insulated due to thermal bridging of the framing
Roof space – insulation is wet
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A leak through roofing, around a chimney, flue or other roof penetration, from an inadequately flashed parapet or an overflowing internal gutter
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Leaking pipes or water tanks in the roof space
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Moist subfloor air moving through brick veneer cavity where the cavity is open to the roof space and to the subfloor space
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Moist subfloor air moving through an uninsulated framing space where holes were drilled in top and bottom plates to allow framing to dry when wet timber framing was used for construction
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Moist air flow from kitchens and bathrooms into the roof space through wrongly installed ceiling vents or open recessed downlights
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Kitchen and bathroom extractor fans discharging into the roof space
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Aluminium foil used instead of a roof underlay, resulting in moisture condensing on the foil rather than being absorbed by the underlay
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Moisture from the cavity of brick veneer-clad walls where the cavity is open to the roof space
Roof space dampness
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A leak through roofing, around a chimney, flue or other roof penetration, from an inadequately flashed parapet or an overflowing internal gutter
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Leaking pipes in the roof space
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Moist subfloor air moving through brick veneer cavity where the cavity is open to the roof space
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Moist subfloor air moving through uninsulated framing space where holes were drilled in top and bottom plates to allow framing to dry when wet timber framing was used for construction
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Moist air flow from kitchens and bathrooms into the roof space through wrongly installed ceiling vents or open recessed downlights
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Kitchen and bathroom extractor fans discharging into the roof space
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Header tank in the roof space has no lid
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Moisture from the cavity of brick veneer-clad walls where the cavity is open to the roof space
Condensation forming on windows
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High levels of moisture within the rooms due to a combination of poor ventilation and not enough heating, poor insulation
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Subfloor dampness getting into the rooms through gaps in the flooring and through service holes cut in framing
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No rangehood venting kitchen to steam to the outside, no bathroom exhaust fan venting bathroom steam to the outside; clothes dryers not vented to the outside
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Use of flueless gas heating
Ceiling mould/mildew growth
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Condensation forms on the ceiling because the roof space is not insulated - mould growth is the result of regular condensation occurring
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Not enough fresh air ventilation to the space
Ceiling mould/mildew growth adjacent to the external walls
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Condensation forms on the ceiling because the roof space insulation has not been taken to the eaves
Ceiling framing location visible on the ceiling
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Condensation forms on the ceiling along the lines of the cold bridges formed by the framing in an insulated roof space - mould growth is the result of regular condensation
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Condensation forming on areas of ceiling where there is no framing in an uninsulated ceiling
Ceiling – water staining
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Leaking roof or deck; overflowing gutter; leaking parapet, balcony, roof/wall junction
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Leaking pipes, header tank or hot water cylinder in the roof space
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Condensation in the roof space from high moisture levels
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
Wall linings generally – mould/mildew growth
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Condensation forming regularly because the wall is not insulated, the house is not sufficiently heated and/or internal moisture levels are too high
Wall framing location is visible
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Condensation forming on the areas between the framing because the wall is not insulated – mould growth is the result of regular condensation
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Mould is forming on the framing locations because a thermal bridge (framing has lower thermal performance than the insulated part of the wall)
Timber boarding, veneered MDF or plywood – black staining
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Evidence of mould growth due to condensation
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Leak in the wall