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Subfloor – deterioration of the underside of particleboard flooring

Subfloor – timber decay

  • Damp subfloor space, lack of ventilation

    How to repair

  • Leaking water or waste pipe; overflowing or leaking from wet area fixtures such as bath, shower, handbasin, dishwasher, clothes washer, hot water cylinder

    How to repair

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Pole foundations – water damage to underside of flooring

House is draughty

Pole foundations – underside of flooring visible

  • Damage to or missing subfloor insulation, or no subfloor insulation was installed originally 

    How to repair

Timber floorboards, particleboard or plywood springy

Timber floorboards, particleboard or plywood squeaking

Timber floorboards – borer

Timber floorboards joints opening

  • Flooring has shrunk because: the timber was wet at installation the flooring is subject to high heat such as from sunlight through north-facing windows or a central heating system that maintains a high indoor temperature and low internal moisture level the timber has become drier after floor insulation has been installed central heating has been recently installed the floor has been finished with polyurethane which glues the boards together, and shrinkage when it occurs create wider gaps at every third or fourth board  

    How to repair

Timber floorboards cupping

  • Cupping occurs because boards are drier on one side than the other resulting in uneven shrinkage so cupping may be due to boards swelling if the moisture levels of internal spaces are higher than the moisture content of the boards

    How to repair

Timber floorboards – tongues of T&G boards exposed

  • Too much sanding of cupped or damaged boards to remove cupping or damage 

    How to repair

Timber floorboards, particleboard or plywood flooring rotten

  • High subfloor moisture levels 

    How to repair

  • Cladding leak

    How to repair

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