How To Install A Spray-On Foam Roof On Your Home

There are many options to choose from when it is time to install a new roof on your home. Installing a foam roof can help keep your home cool in the summer with its light-colored reflective surface and warm in the winter with its insulative properties. Here are some instructions to help you install a foam roof on your home. 

Clean Debris From Your Roof

If you are installing your new foam roof onto one of the many types of old roofing materials, such as metal, tar and gravel, or shingles, you will need to clean the roof of any loose shingles, rocks, leaves, and any other loose debris. When the layer of foam roofing is installed, it needs a solid foundation to create a solid bond to remain secure on your roof. Fortunately, because foam expands as it is applied, it forms to and adheres to any type of roof surface.

Pick up any larger pieces of debris and broken shingles, then use a broom or a power washer to clean your roof of smaller particles. If you are using a power washer, make sure you use either a universal 25 degree green-colored or 40 degree white-colored tip to only remove the loose debris from the roof. You don't want to remove any attached roofing materials from the existing roof and cause unnecessary damage to your underlying roof and your new roof's base. Allow your roof to dry completely of all moisture.

Wear Safety Clothing

Although spraying on a foam roof can be a more simple process than installing other types of roofs, it is important to protect yourself from the materials during application. As you spray the foam onto your roof, the materials become airborne and can be inhaled during the process. It is not recommended to allow the foam to come in contact with your skin, as it can cause skin irritation. So, wear safety goggles, rubber gloves, and a NIOSH rated respirator to protect your your eyes, skin, and lungs from the airborne adhesive.

Also, wear long pants and a long-sleeved shirt, or you can wear a disposable coverall suit with a hood to protect your entire body, which you can find at most home improvement and roofing stores. 

Spray the Foam Layer

The spray foam mixture comes in a metal cylinder, barrel, or plastic tub, with an attachment where you install the spray hose nozzle. When you are ready to apply the foam, press the nozzle's trigger on the hose to turn on the flow. 

As you spray out the the product, it combines to create a mixture that foams up upon contact of your roof's surface. Begin at one end of your roof and work your way to the other, spraying the foaming mixture in slow, sweeping movements. Make sure you apply the coating of foam evenly to create a smooth and even surface over your roof. 

The foam usually hardens within a few minutes after applying it, so if you make any mistakes in its application, immediately wipe the foam off with a wet rag and reapply it. You can also use this curing time to level off uneven areas with a long two-by-four to scrape off any excess foam material before it hardens.

Apply the Top Coat

Once your foam has cured and hardened, you will need to apply a protective acrylic top coat layer to prevent UV degradation and any other damage to the foam layer. The acrylic top coating is also a waterproof barrier to help further protect your roof from leaks.

You can apply this acrylic coating with a paint roller, paint brush, or spray it on with a paint sprayer. Apply multiple coats of acrylic, allowing each to dry before apply the next coat, to seal in the foam and to ensure you coat all areas of your roof with a durable, thick layer of protection.

Now you can enjoy your new waterproof and water-resistant foam roof. If you need assistance, contact a roofing company like Dodge Foam & Coatings Inc.


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