There's no avoiding the fact that concrete contains moisture, yet a critical component for successful adhesion of a coating system to a concrete substrate is having a dry substrate. Knowing how to test for moisture and addressing the conditions causing it are things all contractors should familiarize themselves with before applying coatings. Consulting with the coating manufacturer and reviewing the manufacturer's technical data sheets are excellent ways to gain this information.
Environmental conditions can wreak havoc throughout all phases of a coating’s application, but what happens when the wrong tools are used during the mixing process or the material is mixed incorrectly? To avoid negative effects of improper mixing, the manufacturer typically provide technical datasheets, application guidelines, and technical support to aid in the completion of a successful application.
The most common method employed to tie into an existing hot rubberized asphalt system is to use more hot applied asphalt. This involves using hot kettles and can present some jobsite challenges, such as mobilization issues, safety concerns and foul odor. Cold-applied membranes can address all these concerns. Consult the manufacturer of the cold liquid-applied membrane to verify approval of application procedures. Manufacturers may be able to offer case histories, detail drawings, and application guidelines to help provide technical support needed for tie-in methodology.
Most methods, however, will include the steps listed below.