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Unit: Subfloor coatings and toppings

LMFFL2102A: Prepare, select and apply smoothing and patching compounds
LMFFL2103A: Select and apply appropriate compounds and additives
LMFFL2105A: Select, prepare and apply moisture barriers and damp proof membranes to concrete sub-floors

Section 3: Priming, patching and levelling

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Audio for slide 1 (mp3 |6|KB)
Levelling compounds are used to build up the underlayment that goes between a subfloor and the floor covering.

They're generally used on concrete subfloors, but can also be applied to sheet flooring products and timber strip flooring.

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Audio for slide 2 (mp3 |6|KB)
The process of installing an underlayment begins with priming and patching the subfloor to provide a suitable substrate for the levelling compound.

Then the compound is poured onto the surface and smoothed and levelled.

In this section, we'll look at the main types of products used to build up an underlayment and the general processes involved.

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Completing this section

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The assignment for this section will help to prepare you for the practical demonstrations you will need to perform for your assessor.

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:

  • Types of levelling compounds

  • Applying primers

  • Applying patching compounds

  • Applying levelling compounds

  • Estimating quantities.

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

The Just for fun exercise is designed to check your knowledge of the moisture and pH levels permitted under the Australian Standards.

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