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Scratch coats are mixed at 1 part cement to 2-1/4 to 4 parts sand, brown coats are mixed at 1 part cement to 3 to 5 parts sand, and finish coats are 1 part cement to 1-1/2 to 3 parts sand.
How do you mix stucco base?
Mix #1 Basecoat: 1 part portland cement, 1 part masonry cement, 3-1/2 – 4-1/2 parts sand, fibers per manufacturer’s recommendations. Mix #2 Basecoat: 1 part portland cement, 1/4 – 1/2 part lime, 3 – 4 parts sand, fibers per manufacturer’s recommendations.
What is the difference between stucco base coat and finish coat?
The main difference between this system and a hard coat system is the adhesive base used to adhere the foam to the substrate and a different finish coat that is designed to keep out water.
What’s the best mix for stucco?
The Basic Recipe: Like I mentioned before a simple 3 parts sand to 1 part plastic cement ratio is adequate for most stucco and stone scratch coats.
How do you mix stucco finish coat?
Blend approximately 2 gal (7.6 L) of water per 80 lb (36.3 kg) bag or 1.25 gal (4.7 L) per 50 lb (22.7 kg) bag • Place water in the mixer and slowly add the Finish Coat Stucco • Mix 2 – 3 minutes or until a mortar-like consistency is achieved.
What is the ratio mix for stucco?
Scratch coats are mixed at 1 part cement to 2-1/4 to 4 parts sand, brown coats are mixed at 1 part cement to 3 to 5 parts sand, and finish coats are 1 part cement to 1-1/2 to 3 parts sand.
What is stucco mix made of?
Modern stucco is used as an exterior cement plaster wall covering. It is usually a mix of sand, Portland cement, lime and water, but may also consist of a proprietary mix of additives including fibers and synthetic acrylics that add strength and flexibility.
How long do you wait between coats of stucco?
Cure Time: The scratch coat should be allowed to moist cure for a period of 3-5 days. This allows the cement to become hard enough to gain most of it’s strength before the brown coat is applied.
Can you paint stucco base coat?
The short answer is yes, you can paint stucco! You can paint any type of finish coat, whether it is a traditional (cement based) finish or when using an acrylic type of finish. I have even seen some people paint the brown coat (the base coat) of their stucco and skip applying the finish coat altogether!.
Why you should not paint stucco?
Stucco needs to breath – One of the main reasons you shouldn’t coat your stucco with paint is because stucco is porous. This allows moisture that hits the surface to easily evaporate away. A coat of paint can harm that breathability. The stucco will not bond to the paint and will crack and fall away.
What is a 2 coat stucco system?
Two-Coat Stuccoing In a two-coat application, the brown coat is eliminated and the finish coat is applied directly to the scratch coat. As shown in the illustration, the scratch coat of QUIKRETE® Base Coat Stucco is applied to a 3/8″ thickness, grooved, and cured as in a three-coat system.
Can you use chicken wire for stucco?
There is really only one style and it resembles the look and thickness of traditional chicken wire. This is really the only type of wire that is used for a one coat stucco installation and the wire is made specifically for it too, so keep that in mind.
How much does a 5 gallon bucket of stucco weigh?
Weight: 48,000 Lbs.
How thick is stucco finish coat?
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.
Can mortar mix be used for stucco?
Mortar (80 lbs.) – Mortar can be used but I would recommend using a stucco base coat instead of mortar because it is a different consistency and has a little bit different composition but you can use it in a pinch.
What kind of cement do you use for stucco scratch coat?
QUIKRETE® Scratch and Brown Base Coat Stucco (No. 1139) is a portland cement based stucco used for construction and repair of stucco walls.
Can you use spec mix for stucco?
SPEC MIX® Scratch and Brown Preblended Stucco is a dry, preblended cement-based product designed to be used as the scratch and/or brown coat in a three-coat stucco application. This product also can be used as the first coat in a two-coat application for exterior stucco applications.
What is a 3 coat stucco system?
Three coat is the original stucco process, consisting of paper and wire, a scratch coat, a brown coat, and a finish, or “top” coat. More specifically, a lath of an asphalt-infused paper is applied over a weather-resistant barrier.
How do you mix exterior stucco?
The Basic Stucco Finish Formula: 1 part Portland cement. 1 part hydrated lime. 3 parts sand. Water to thin out mix to a cake batter consistency.
What type of sand is used for stucco?
The All Purpose Quikrete sand that is found at most Home Depot locations will also work for stucco base coats, as it is washed and screened too. This sand is a coarse sand though and will make for a rougher base coat over a finer sand.
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.
