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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 1: Preparations


Assignment


Your trainer may ask you to complete this assignment as one of the assessment requirements for this unit. For more information about the assessment process and advice on what to do if you need help with your reading and writing, click on the link below.

Assessment requirements

Provide short answers to the following questions:

  1. What are the maximum relative humidity (RH) levels permitted in a concrete subfloor under AS 1884 and AS 2455 using the following two testing methods?

    1. surface-mounted insulated hood' test

    2. in-situ probe test.


  2. How many RH tests should be carried out to determine whether the floor meets the requirements of the Standards? State the number of tests required and the floor area.

  3. If the moisture content reading was too high in a raised timber subfloor, what might be causing the problem? List at least three possible causes.

  4. What is the acceptable moisture content range for timber subfloors, as specified under AS 1884 and AS 2455? State the upper and lower levels.

  5. How should you remove the following contaminants and substances from a concrete subfloor?

    1. a small amount of oil or grease on the subfloor surface

    2. a large amount of oil or grease that has penetrated the pores of the concrete

    3. blobs of cornice cement and surface dags

    4. spalling or weak surface material

    5. dust from scraping and grinding.


  6. The latest Australian Standard for resilient flooring installation (AS 1884-2012) says that a pH test must be carried out on all concrete subfloors. What is the pH range specified in this Standard?

  7. What is the best way to remove surface contaminants from a timber subfloor?

  8. If you were preparing an old subfloor for a coating or topping and came across asbestos-based products, what should you do?

Doc (405 KB) Preparations Assignment template

Click on the link above to go to the Word document you will need to complete. You should fill in your answers on-screen and then either:

  • print out a hard copy to send to your trainer by post

  • save the file electronically to submit to your trainer as an email attachment.