Step-by-Step Guide: Applying Shingle Spray with a Backpack, Airless, or Low-Pressure Sprayer

To apply a fresh roof coating mixed with water at a 1:2 ratio using a backpack sprayer, airless sprayer, or low-pressure sprayer, follow these detailed steps to ensure proper application:

Preparing and Mixing the Solution

• Shake the Product: Before mixing with water, shake the product container thoroughly to ensure all ingredients are well-blended. This helps prevent any settled materials from affecting the consistency of the final solution.
• Prepare the Mixture: For every gallon of the roofing product (1 part), add 2 gallons of water (2 parts). This 1:2 ratio is critical to achieve the correct consistency.
• Example: For 12 gallons of the final mixture, use 4 gallon of the product and 8 gallons of water.
• Blend Thoroughly: Once the product and water are combined, mix thoroughly until the solution is uniform. This step ensures even application and optimal performance of the roof coating.

Step 2: Setting up Equipment

Each sprayer type has unique setup requirements to maintain an accurate and consistent application.

• Backpack Sprayer
• Fill the sprayer tank with the mixed solution.
• Adjust the nozzle to a wide fan spray for better coverage across a large area.
• Pump the backpack to pressurize the sprayer according to the manufacturer’s recommendations.
• Airless Sprayer
• Ensure the sprayer is rated for the viscosity of the roof mixture.
• Use a tip size appropriate for coatings (usually 0.015–0.021 inches).
• Set the pressure to a low-to-medium setting to prevent overspray while maintaining coverage.
• Low-Pressure Sprayer
• Similar to the backpack sprayer, adjust the nozzle to a wide fan spray.
• Keep the pressure low for uniform coverage without excessive atomization.

Step 3: Application

• Coverage Rate: Apply at a rate of 1 gallon mixed per 200 square feet.
• To maintain this rate, divide the total roof area by 200 to determine the number of gallons needed.
• Example: For a 1,000-square-foot roof, divide 1,000 by 200, which equals 5 gallons of the mixed solution.
• Spray Technique: Regardless of the sprayer type, use the following technique:
• Even Sweeping Motion: Keep the sprayer wand or nozzle about 12–18 inches from the surface.
• Overlap Passes: Overlap each pass slightly to ensure complete coverage without streaks or missed spots.
• Consistent Speed: Move at a steady pace to maintain an even coat, which is essential for proper drying and curing.

Step 4: Clean Up

After completing the application:

• Clean the sprayer with water to prevent clogging.
• Flush all sprayer parts, especially the nozzle, to ensure there’s no residual buildup.

Following these steps ensures an even and effective application for long-lasting roof protection.