Coatings can be very useful in preserving the life of many types of roof systems. They can be used to restore the roof’s weathering surface; to protect the roof from UV light; to provide fire resistance; to prolong the service life of a roof; and to improve the aesthetics of the roof surface.

Fluid-applied coatings can refer to a liquid applied membrane coating, or even paint, by some manufacturers.

ChemTech defines fluid applied roofing systems as those systems that were designed and manufactured as waterproofing agents, optionally incorporating a reinforcement scrim sheet, at installation. Fluid applied systems have many inherent advantages.

The key to success when using these systems is to properly identify the correct application and substrate preparation. Nearly all of these systems should never be installed where water ponding is a problem.

The expected life of most systems is five years, with signs of aging around the third year. These systems are usually applied as a recovery application over an existing system in one or more coats or directly to the roof deck.

ChemTech Roof & Insulation Systems installs the following types of roof coatings:

• Acrylic Coating is a product that has the advantages of a traditional elastomeric coating with the added benefit of performing in water ponding conditions. This system usually incorporates a polyester reinforcing fabric providing excellent flexibility and strength
  
  
• Elastomeric Coating is typically water based and is used as a recovery application to extend the life of an existing system. The most common applications are on walls; metal roof systems; smooth surface built-up-roof systems; single-ply membrane systems; and concrete
  
  
• Acrylic Modified Urethane Coating is a system having many advantages such as flexibility; chemical and traffic resistance; potable water storage; and can be applied over most roof systems. The different application strategies can yield a system with an expected life of 15 years
  
  
• Polyurethane Foam Spray is a system that is very similar to a liquid insulation. The systems themselves are installed directly on the roof deck or existing roof membrane. The polyurethane foam has a high level of failure when exposed to ultraviolet (UV) light; therefore, requires a surface coating be applied. Until recently, coatings have only lasted about 5-7 years. Unless periodically inspected and maintained, UV exposure can result in the premature failure of a polyurethane foam system. This system insultates as well as waterproof