Many problems that arise with timber flooring are due to moisture issues, related to the moisture content of the timber or sub-floor that it was laid on.

It is therefore safe to say that checking the moisture content of both the timber and sub-floor is unbelievably important.

Because timber is hydroscopic, that is it accepts moisture, one must be aware and understand that in coastal or high humidity areas, moisture readings will be slightly higher than dry inland areas. Generally in Sydney, the accepted moisture content for timber is 12%.

Any concrete slab must have a moisture content of no more than 5.5 percent as tested by a hydrometer.

Our tip for you? Make sure your tradesman performs a moisture test – simple!

What else can you do?

• Report any known damp areas on the inside/ outside of your property to your tradesman.

• Subflow ventilation should be inspected and the ground under the house should be dry and not showing signs of damp or mould.

• If subflow ventilation is not sufficient, this should be rectified before any work is commenced. Speak to your builder and floor layer as needed.

• Timber should be ‘acclimatised’ for at least 2 weeks inside your home. This is an important step to ensure the timber has an equalised moisture content to the level inside your home, so make sure you plan your job ahead to avoid complications.

• Expose your floor to dry air by turning on the air conditioning after the floor is laid and before sanding has started in order to allow the timber to move as needed.

Moisture Testing

Moisture test of concrete slab