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Unit: Inspecting and testing subfloors

LMFFL2004A: Moisture test timber and concrete floors
LMFFL3101A: Inspect sub-floors

Section 2: Moisture in subfloors

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Audio for slide 1 (mp3 |6|KB)
Everyone knows how destructive water can be when it penetrates a building during a storm or flood.

But most people don't realise that moisture is permanently present in just about all building materials, and is constantly moving in and out of them through the process of absorption.

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Audio for slide 2 (mp3 |6|KB)
In this section, we'll discuss the essential role that water plays in the formation of particular materials, such as wood and concrete.

We'll also examine the ways moisture moves from one medium to another as it tries to find a balance, or 'equilibrium', wherever it is present.

And we'll look at the effect that these moisture changes can have on the building materials used in subfloors.

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Completing this section

Audio 3 (mp3 |6|KB)

The assignment for this section is designed to test your knowledge of how timber and concrete dries, and what effect the drying process has on their properties.

Have a look at the Assignment now to see what you'll need to do to complete it. You'll find the link in the menu bar.

Also in the menu bar are links to the lessons for this section:

  • Relative humidity and moisture

  • Moisture in wood

  • Drying timber to EMC

  • Moisture in concrete

  • Drying concrete to EMC.

These lessons will provide you with background information that will help you with the assignment.

The Just for fun exercise allows you to check your understanding of the changes that take place in timber as it dries.

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