PERMANENT PAVEMENT MARKINGS
PK has the equipment and experience to install all types of permanent pavement markings both non durable (lasting 1 year or less) and durable (lasting 3 years or more). In selecting which type of material to use, an owner/agency must consider a number of factors such as: pavement type and condition, the desired frequency of restriping, the dangers of restriping, the level of desired reflectivity and the safety gained by wet reflectivity. These factors must be weighed against the cost of providing the longest lasting, most highly reflective marking that can be seen day and night when it’s dry or raining.
Preformed Tape is supplied in rolls. It is available in different grades, the highest of which can provide wet reflectivity and reflectivity levels exceeding 1000 milicandelas. Preformed tape is applied by two different methods.
The Inlay Method is a process where the permanent tape is applied to new asphalt while it is still hot in advance of the finish roller. The roller presses the material into the asphalt, depressing it slightly to help protect it from the damage caused by snow plows. Since it is applied to the asphalt during the paving process it can be installed during the entire paving season
The Overlay Method is a process where the tape is applied to existing pavement (asphalt or concrete) and tamped with a rolling device to ensure its bond to the surface. In some cases a liquid primer is applied to the pavement to strengthen the bond. Because of the speed of application, this method is well suited to mark intersections that are open to traffic with minimal traffic delay. While the material can last up to five years it is more susceptible to damage by snow plows unless it is recessed into the pavement.
Preformed Thermoplastic (Hot Tape) is a cross between thermoplastic and preformed tape. It is a thermoplastic that is supplied in strips of different colors and widths or in preformed symbols and letters. The material is applied to the pavement and then fused to the surface by the use of propane torches. It is the most expensive durable material and is slow to apply but can be manufactured in various colors and shapes to produce very specialized markings.