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Do It Yourself Cool Roof Kit

Printer Friendly Guide (in PDF)

Here are the steps to follow to coat your roof yourself:

STEP 1: Identify Your Roof's Eligibility
The Cool Roof coating can only be applied to a flat roof covered with smooth asphalt, EPDM rubber or smooth aluminum.

STEP 2: Check Your Roof's Warranty
Before you coat, check your current roof warranty to make sure that coating the roof will not void the warranty.

STEP 3: Follow the Forecast
You will need three days (72 hours) of rain-free weather to properly coat your roof.  The temperature must be over 50° F for the coating to dry properly.

STEP 4: Plan for Safety
Safety is of utmost importance. Familiarize yourself with the roof before you begin work. Be aware of any tripping hazards and always stay alert. Peak coating season is in the summer months, so be sure to stay hydrated and wear sunscreen to avoid heat-related injuries.

STEP 5: Inspect and Repair Your Roof
Your roof must be free of any blisters, cracks or peeling paint before you can begin coating. You should check for loose screws, poor drainage, pooling and any other issues that may need to be addressed before beginning to coat.

STEP 6: Measure Your Roof
The amount of coating needed is determined by the square footage of your roof. Multiply the length and width of your roof's perimeter to get the square footage. Use this number to calculate the amount of coating you will need according to the manufacturer's directions.

STEP 7: Clean Your Roof
Before you can begin coating your roof, you should clean and wash the surface using brooms and pressure washers. When washing the roof, pay attention to drainage and make sure there is no puddling. 

STEP 8: Grid Your Roof
To ensure the coating is applied evenly across the roof, divide your rooftop into square sections.  Most coating products suggest gridding your roof into 100 square feet sections. When you purchase the coating material, read the manufacturer's directions to determine how much area one container of coating material will cover.

STEP 9: °Cool Your Roof
You should start coating furthest away from the roof entrance and work backward. Be sure not to paint yourself into a corner. The first coat must dry overnight before applying a second coat. Once the coating is cured it is very difficult to remove. Be sure to clean up spills and clean coating from tools immediately.

STEP 10: Clean Your Roof Annually
The best way to make sure your roof coating lasts as long as possible is to clean the roof at least once a year. This is also a good time to also look for leaks, puddling or other issues that could damage your roof if left unaddressed.

If you would like more information, email us at Coolroofs@buildings.nyc.gov.