Subfloor seepage problems, in Pullenvale, a Western suburb of Brisbane,

Subfloor seepage problems, identified by Peter Weddell, owner/operator of Qld Home Buyers Inspection Service and Queensland Building Inspection Service, QBIS.

Problems caused by seepage to sub-floor

Serious problem:

These photos show why the outside soil paving levels must be maintained at the proper levels, at below any timber and steel of the sub-floor area of a building.


Soil levels to the perimeter of the house were too high.

This was allowing seepage to cause rotting of sub-floor timber and rusting of a steel bearer.

Subfloor seepage deterioration problems

Mould danger:

Forming on this timber which will cause rot over the long term also potential health problems with inhabitants of the building.

Subfloor seepage causing damage

Indicators of seepage to subfloor:

  • Water stains to this sub-floor brick wall, an indication as to the height of the soil level on other side.
  • Mould forming on brick or plaster walls.
  • Musty smell after the house has been closed up for the day or so.
  • Adults or children developing breathing problems.

Subfloor seepage causing serious problems


  • Ponding of water to sub-floor area of a house
  • Can cause movement.
  • Deterioration of timber.
  • Rusting of columns.
  • Mould.
  • Dry rot.
  • Potential health with inhabitants
  • May also attract termites.

All these items are serious and could have an affect on the reselling of your house unless rectified urgently.

For independent Building Inspections Brisbane in all suburbs, Qld Home Buyers Inspection Service.