How thick should stucco be on block wall?

The correct thickness is then 5/8 inch. Two-coat applications are only for use over solid plaster bases without metal lath. For unit masonry, that thickness is ½ inch. For cast-in-place or precast concrete, the thickness for two-coat work is 3/8 inch.

Can you put stucco on concrete block?

Concrete block makes a super base for Portland cement-based plaster (stucco). The two materials are made from the same basic ingredients and they are extremely compatible. Prop- erly done, it’s a great combination. The concrete block should have an open or coarse texture.

How thick is stucco on CMU?

DIRECT APPLY PLASTER APPLICATION: Portland cement plaster can be applied directly to CMU or cast-in-place concrete in a two-coat application with total thickness ranging from 1/2 inch minimum to 5/8 inch maximum. This consists of a 3/8 inch to 1/2 inch basecoat and a 1/8 inch finish coat.

What happens if stucco is too thin?

In cases where the stucco is too thin or too thick, cracking may occur. Cracked stucco allows moisture intrusion which then may lead to stucco deterioration or damage, especially in cold climates with freezing and thawing cycles.

Will stucco bond to concrete?

Stucco needs to be applied to a sturdy, stable surface in order to ensure that it doesn’t crack or crumble. If you apply stucco to a wooden surface, you must first install a metal netting to hold the stucco, but it can be applied directly onto a concrete surface.

How thin can you make stucco?

One of the factors that can affect the strength of Traditional Hard Coat stucco is the thickness. The building code has a minimum requirement for the thickness of Traditional Hard Coat stucco, it is 7/8 of an inch.

Can you stucco directly over CMU?

When installing stucco over concrete masonry units, you may either direct apply the stucco to the CMU or install a water resistive barrier and lath the CMU. Cracks in the CMU will propagate through the stucco and without a water resistive barrier, water may penetrate into the wall assembly.

How thick is stucco applied?

3 layers are necessary for all but a plaster base. The thickness ranges from 3/8″ to 5/8″.