Situation:

A large information processing center in southern Florida uses a lot of electricity to keep the building cool and has hundreds of feet of large duct work. The building owner was looking for reflectivity in order to reduce energy costs along with waterproofing.

Solution:

In order to reduce utility costs, the 40,000 square foot roof as well as the extensive duct work and remote terminal units (RTUs) were coated with GacoFlex S2000 White Solvent-Free 100% Silicone Coating. GacoFlex S2000 provides great adhesion to multiple surfaces including modified, metal and galvanized metal. This project was completed exactly to specification and the result has been zero leaks reported and perfect adhesion.

Unique Characteristics:

The first section was completed with a single coat of GacoFlex E5320 2-Part Epoxy Primer/Filler, however bleed-through occurred due to oils in the modified wicking out which caused mild discoloration of the top coat. A two-pass primer test was then completed to see if the bleedthrough could be blocked. It worked, so the building owner then moved on with the next few sections of the roof. A year after the initial section was completed a second coat of GacoFlex S2000 was applied over the discolored surface and to this date has remained bright white.

Installation:

The galvanized metal on the duct work was cleaned and lightly sanded to improve adhesion of GacoFlex E5320. The seams were protected with GacoFlex 66S Polyester Reinforcing Mesh Tape and then GacoFlex S2000 was applied to the ducts in two passes at 0.75 gallons per 100 square feet. The roof was coated with two passes of GacoFlex E5320 at 0.33 gallons per 100 square feet in each pass. GacoFlex S2000 was then applied at 2 gallons per 100 square feet in one pass. The RTU units were coated with a single pass application of GacoFlex E5320 and all of the fasteners were covered with GacoFlex SF2000 SeamSeal. All RTU surfaces were top coated with GacoFlex S2000 in two passes at 0.75 gallons per 100 square feet.

To complete the installation, GacoFlex SF2036 WalkPad was applied to make a durable walkway for pedestrian maintenance traffic.

Coating the entire roof (including the duct work and RTU units) has resulted in substantial savings on utilities, prompting the building owner to use GacoFlex S2000 on two more building sections.