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    Construction Performance Guidelines

About the Guidelines

These helpful guidelines outline work and material deficiencies in new homes and residential condominium units covered under the statutory warranty [...]

A4: Measuring Variation from the Specified Plane Using a Plane of Reference

4.1 To measure the variation:

  1. Place two blocks of equal thickness on either side of the surface you are considering.
  2. Stretch a string across the top of the blocks so the string doesn’t sag; the blocks may have to be secured from moving.
  3. Measure the difference between the string and the actual surface and subtract the thickness of the blocks.
  4. Compare the result with the allowable variation in the Guidelines.
Measuring Surface Variation
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4.2 Approximate width measurements specified in this document:

In order to quickly assess whether a defect is within the specified tolerances, the following Canadian coins may be used to approximate measurements of variation.

Table: Measuring CPG Specified Thicknesses with Coins
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