A liquid rubber coating that is sprayed or rolled onto the roof surface. The consistency is thicker than paint, and the product can be used on flat or low slope roofs.
Acrylic coatings are water or latex based. They are designed for areas where water does not pond. They are typically more environmentally friendly than the their solvent based counterparts.
Solvent Based Coatings
Solvent Based coatings typically contain more than 60% organic solvents. These solvents chemically bond into the surface it is installed over to provide a stronger hold than traditional acrylic coatings. While being more expensive than acrylics, they also perform better in most cases.
PUF (Polyurethane Foam) / SPF (Sprayed Polyurethane Foam)
PUF/SPF roofing starts out as two liquid components - an isocyanate, known as the "A" component, and a resin (or polyol), the "B" component. When the liquids are mixed at a one-to-one ratio, a chemical reaction occurs and the mixture expands 20 or 30 times forming a monolithic, closed-cell roof system that is designed to adhere to a variety of substrates or roof decks. Flashings and vertical wall terminations are also spray applied.
While these roof systems are much more commonplace in arid climates (for e.g., the southwest U.S.), climate and weather conditions in the Midwest make for difficulty in not only effectively applying this product but also maintaining an effective waterproof surface. Installation requirements are exacting, meaning that there are very few working days per year that are suitable to install either product. Additionally, Midwest weather can wreak havoc on the construction details of both types of systems. The installed cost from this category is typically not compelling compared to other systems, and when warranty matters come into play, it is difficult to recommend this category to our clients.