What are the layers of a stucco wall?

Three coat is the original stucco process, consisting of paper and wire, a scratch coat, a brown coat, and a finish, or “top” coat.

How many layers does stucco have?

three coats
Stucco application typically requires three coats. The initial “scratch coat” provides adhesion to the building. The “brown coat”, which comes second, is responsible for creating an even surface. Finally, the “finish coat” determines the stucco’s outward appearance.

What goes behind stucco walls?

Sheathing is basically the “backing material” that can be found underneath the various layers of stucco that form the backing of residential and commercial buildings. They can be made out of wood, cement, gypsum, fiberglass and other materials.

How thick are the three layers of stucco?

As its name suggests, three coat stucco is applied in three layers: 3/8-inch thick scratch coat, 3/8-inch thick brown coat, and approximate 1/8-inch thick finish coat.

What goes on the house before stucco?

When working with an existing masonry or brick wall, you’re going to first need to use some fresh mortar to repair any cracks that exist, then wash the wall with a power washer (or use a trisodium phosphate-water mixture and scrub it). The wall should be thoroughly wet before you apply the first coat of stucco.

How thick is a layer of stucco?

Although it is called a “One Coat System,” the stucco material is usually a 3/8 inch thick coat with a 1/8 inch finish coat applied over it; thus two layers or coats.

How are stucco walls built?

Traditional stucco is applied in a three-coat process to wood-frame exterior walls. It starts with a “scratch coat” spread over metal lath attached to a house’s exterior sheathing. The rough surface allows the next layer, the “brown coat,” to adhere.

How thick is a stucco 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.

How thick is stucco on an exterior wall?

How thick is each layer of stucco?

Traditional Hard Coat stucco is 7/8 inch thick Scratch coat 3/8 inch. Brown coat 3/8 inch. Finish coat 1/8 inch. Total thickness is 7/8 of an inch.

What is the minimum thickness of stucco?

The minimum thickness of stucco from the face of the base shall be not less than 3/4 inch at every point… Non-corrodible flashing or other expedients that will prevent penetration of moisture behind the stucco shall be used when necessary.