Estimate stucco mix, coverage, and cost for walls and exteriors.
Stucco Application Guide
Stucco is a durable cement-based finish used on exterior and interior walls. Proper estimation ensures you have enough material for all required coats without excessive waste.
| Coat | Thickness | Coverage per 80lb Bag |
|---|---|---|
| Scratch Coat | 3/8 inch | 25-27 sq ft |
| Brown Coat | 3/8 inch | 35-40 sq ft |
| Finish Coat | 1/8 inch | 70-80 sq ft |
| One-Coat | 3/8 inch | 55-65 sq ft |
Frequently Asked Questions
How much stucco do I need per square foot?
A standard three-coat stucco system uses approximately 8-9 pounds of stucco mix per square foot at 7/8 inch total thickness. One-coat systems use about 4-5 pounds per square foot.
What are the three coats of stucco?
Traditional stucco has three coats: the scratch coat (3/8 inch), the brown coat (3/8 inch), and the finish coat (1/8 inch). Each serves a specific purpose in creating a durable, weather-resistant surface.
How much does stucco cost per square foot?
Materials cost $2-5 per square foot. Professional installation runs $6-12 per square foot total. EIFS (synthetic stucco) costs $4-8 per square foot installed. Costs vary by region and complexity.
How long does stucco last?
Properly applied and maintained stucco can last 50-80+ years. It’s one of the most durable exterior finishes available. Regular inspection and prompt repair of cracks extends its lifespan significantly.
Can stucco be applied over brick?
Yes, stucco can be applied over brick, concrete block, or poured concrete. The surface must be clean and dampened first. A bonding agent or metal lath may be needed depending on the surface condition.
What causes stucco to crack?
Common causes include foundation settling, improper mixing ratios, insufficient curing time between coats, missing control joints, and seasonal thermal expansion/contraction. Small hairline cracks are normal.
How many bags of stucco do I need?
An 80-pound bag of pre-mixed stucco covers about 25-27 square feet for the scratch coat, 35-40 sq ft for the brown coat, and 70-80 sq ft for the finish coat. Coverage varies by manufacturer.
What is the difference between stucco and EIFS?
Traditional stucco is a cement-based plaster applied over wire lath. EIFS (Exterior Insulation and Finish System) uses foam insulation boards with a thin synthetic finish. EIFS is lighter and more energy-efficient but less impact-resistant.
Can I stucco my house myself?
DIY stucco is possible but challenging. It requires proper lath installation, correct mixing, and skilled trowel work. The scratch and brown coats are more forgiving; the finish coat requires experience for a uniform appearance.
How long does stucco take to dry?
Each coat needs to cure properly: scratch coat 24-48 hours, brown coat 7 days minimum, finish coat 24 hours before light exposure. Moist-curing (misting with water) during the first few days produces a stronger finish.