Alberta Building Code - Stucco Application

Here is the what the Alberta Building Code (1997) has to say about Stucco Application (Thickness):

9.28.6. Stucco Application

9.28.6.2. Number of Coast and Total Thickness

1) Stucco shall be applied with at least 2 base coats and one finish coat, providing a total thickness of less than 15mm, measured from the face of the lath or the face of the masonry where no lath is used.

9.28.6.5. Finish Coat

2) The thickness of the finish coat shall be not less than 3mm.

9.28.6.6. Alternative Method

1) Stucco shall be applied in at least 2 coats to provide a total thickness of not less than 19mm measured from the face of the sheathing paper to the face of teh second coat where lath is used.

2) The second coat shall be continuous across the entire surface of the coat and be without gaps of voids.

The basic point here is - if you are applying in 2 coats (which is pretty much the standard now in Alberta) then it has to be at least 19mm; or for those imperial minded people, 3/4".