18 High Street,
Glen Iris, VIC 3146

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Mould and condensation

Condensation arises because warm air can hold more moisture than cold air. The presence of condensation will be reduced in direct proportion to the increased temperature of the internal walls. When condensation settles on walls and windows, this forms the basis for mould growth.

Mould growth is particularly evident behind furniture where there is insufficient cross flow ventilation present to disperse the natural exhalation being generated by the occupants.

Many domestic and industrial appliances such as gas, oil and kerosene fired stoves, burners and heaters produce large quantities of water as a product of combustion. This problem does not arise with fluid appliances.

The dilution of moisture-bearing air in the unit will also assist to reduce condensation. Normally this process is achieved through high wall vents, which continually encourage cool outside air to displace warm moisture laden air at the ceiling level.

Let our experienced professionals here at FG James Pty Ltd find solutions and repair all the mould build-up in your home today.


Factors causing Condensation in properties:

  • High wall vent replacement internally and externally
  • Consider extended use of the kitchen, laundry and bathroom exhaust fans
  • If the exhaust fans vent to ceiling, consider reventing to outside
  • If the internal heating is ineffective, a heating specialist should be engaged to advise which heating system should be installed to generate even heat throughout the unit and effectively raise the dew point of the walls
  • The existing mould can be removed with standard household bleach or anti mould agent and the damaged paintwork replaced with an anti mould repainting specification
  • Installation of an anti-condensation unit located in the ceiling space and recirculating warm filtered air from the ceiling
  • For specialist advice, a sub-floor inspection can be arranged with our office which will give a full report on these issues.
  • Condensation settles on walls where normal household traffic activities are minimal
  • The dwelling is locked and left idle during the day
  • Mould may be particularly evident behind furniture, curtains and the like where there is insufficient cross flow ventilation being generated to disperse the prevailing humidity and the natural exhalation being generated by the occupants
  • The exhaust fans in the high humidity areas such as the bathroom or the kitchen may be inadequate or not being used appropriately.
  • The structure has a closed design layout where individual rooms are isolated from each other
  • There may be damp conditions existing under the floor due to the presence of environmental damp such as excessive ground water of a persistent plumbing problem
  • Sub-floor ventilation may be inadequate
  • The high wall vents may be blocked, obscured or non-existent
  • The problem rooms are located away from the warming rays of the northern sun
  • The heating provisions are inadequate or being used locally only

How It Works



Call or email us to book a damp investigation appointment.


Our survey will locate where and what is causing the damp and what measures are required to eradicate it.


All work is carried out by our experienced technicians to the high standards


We are fully insured and all our works are comes with 20 years gurantee

FREE inspection reports, detailed reports and quotations.     Call us Today!! 03-9885-9444


Rotting Floors


Basement & Cellar Dampness


Lateral Damp


Soil Inspection & Report


Specialised Replastering


Advisory Services


Damp Odours & Mould


High Wall Ventilation


Mechanical Ventilation


Bathroom Renovations


Written Condition Reports


Damp Skirting Replacement


Environmental Damp


Rising Damp


Sub Floor Ventilation


Leaking Showers


Specialised Drainage


Membranes to Concrete Balconies / Decking


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