How do you prepare a concrete wall for stucco?

How do you prep a wall for 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.

What do you put under stucco?

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.

Can I put stucco over 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.

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.

How to stucco a cinder block wall for a smooth finish part 1

What kind of paper goes under stucco?

10-Minute Building Paper is ideal for use as a weather-resistant barrier when installed behind stucco or other exterior wall cladding. GMCraft is asphalt saturated building paper.

What type of foam is used for stucco?

Polystrene. Most of the foam boards used with stucco in the one coat system are made out of polystyrene, which is moisture repellent and relatively rigid in terms of its structure. Polystrene is similar to polystyrene foam, but is harder and more durable. It is also used extensively in packing and model making.

How thick is a 3 coat stucco system?

The third coat, the finish coat, is often pigmented for color and applied by smooth trowel, hand-textured, floated to a sand finish, or sprayed. The three-coat stucco system total thickness is approximately ⅞ in. (22 mm), and weighs 10-12 lb.

How do you cover concrete walls?

What are the 3 layers of stucco?

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

What is the main problem with stucco?

When a home's stucco doesn't have the necessary space or is below the grade, it can trap water and moisture leading to the formation of mold, rotting, cracking, and crumbling. Additionally, the stucco will begin to soak up even more moisture from the ground.

What is stucco screed?

Weep screed is a special piece of metal flashing that runs along the bottom of walls that wicks moisture out of holes that are located at the bottom of the flashing.

What is the black paper under stucco?

The paper is a line of defense against moisture and is also referred to as the water resistive barrier in a three coat stucco system. Simple hand tools and attention to minor details are all it takes to install it.

What is the black paper for stucco?

Under stucco, you can use asphalt felt or two layers of Grade-D building paper, commonly used on the West Coast. Both asphalt felt and Grade D paper will block liquid water but allow water vapor to pass through.

Is house wrap better than tar paper?

The main advantage of house wrap, over felt paper, is the superior strength and durability of house wrap. A high-quality house wrap, like Barricade® Building Wrap, is more resistant to ripping and tearing during installation than felt paper.

Does stucco need mesh?

Two-coat stuccoing is often used when stucco is applied directly to concrete or masonry surfaces without the use of lath or wire mesh. This is because the masonry or concrete provides a very rigid stable base.

How thick should the stucco be on a 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 should a stucco first coat be?

“One Coat” Stucco Systems – The stucco is usually 3/8 inch to 1/2 inch thick.