How To Install Roll On Roofing

November 30, 2025

2 min read

To install roll on roofing, you need to prepare your roof deck, apply a primer, and then roll the roofing material in smooth, even layers. Roll on roofing is also called liquid roofing or coating, and it works best for flat roofs. This type of roofing is faster than traditional shingles and costs less. You can do it yourself if you follow the right steps. Let’s learn how.

What Is Roll on Roofing?

Roll on roofing is a liquid coating you spread over your roof. It comes in a container and you apply it with a roller or brush. According to industry data, flat roofing systems cost between $5.50 and $7.50 per square foot, making it one of the cheapest roofing options available. It hardens and creates a waterproof seal over your entire roof.

This type of roofing works great for decks, garages, and flat roof areas. It is not good for steep or sloped roofs because it can slide off.

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How Do You Prepare Your Roof?

First, clean your roof completely. Remove all dirt, leaves, and old debris. Sweep it with a stiff broom or use a pressure washer on low setting. Let the roof dry fully before you start.

Next, fix any holes or cracks. Use roofing cement or patch material to fill them in. Sand down any bumps so your roof is smooth and flat. A smooth surface helps the roofing material stick better.

Check the weather. Pick a dry day with no rain coming. The temperature should be above 50 degrees. Wind and cold make the roofing harder to apply and slow down drying time.

What Are the Installation Steps?

Apply primer first. Most roll on roofing needs a primer coat to help it bond to the roof. Pour the primer into a paint tray. Use a long roller to spread it evenly across the roof. Work in small sections so you do not miss any spots.

Let the primer dry per the manufacturer instructions, usually 2 to 4 hours. Then apply your first coat of roll on roofing. Pour it into a tray and use a roller to apply it. Roll in one direction first, then roll across to make sure coverage is even. Apply it thin and smooth.

Most roll on roofing needs two coats. Wait for the first coat to dry before applying the second. According to This Old House, professional roof inspections are recommended at least once per year or after major storms. After your second coat dries, inspect your work for thin spots or missed areas.

How Long Does Roll on Roofing Last?

Roll on roofing typically lasts 15 to 20 years with good care. According to RubyHome, modified bitumen roofing, a type of roll on system, lasts about 20 years. Metal roofing lasts much longer at 40 to 80 years. Concrete or clay tiles can last over 100 years.

Roofing Type	Lifespan
Roll On (Flat Roofing)	15, 20 years
Modified Bitumen	20 years
Metal Roofing	40, 80 years
Asphalt Shingles	20, 30 years

Keep your roof clean and inspect it twice per year. Clean gutters and remove debris to make your roll on roofing last longer.

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Connect with an experienced roofing solutions to discuss your roofing needs and schedule an inspection.