Lexis Coatings » Roof Coating Technical Support

Frequently Asked Questions

In Depth Answers to Common Questions

An airless sprayer atomizes roof coatings without the use of compressed air. The coating is pumped under high pressure through a spray tip and produces professional results.

Alligatoring is the cracking on a bituminous roof or coating on a SPF roof, producing a pattern of cracks similar to an alligators hide. In coatings, it is often caused by the topcoat to bond to a glossy substrate.

Crazing is the development of a multitude of very fine cracks on single ply membranes such as TPO and PVC. It is similar to alligatoring.

Elastomeric is a generic term for "rubber-like" water-based or solvent-based roof coatings that can expand and contract as the roof moves.

Inspect your Lexis roof coating system regularly. Keeping the roof clean and free of debris will give you maximum performance and longer service life. For more information, read our Roof Coating Care and Maintenance Guidelines.

To attain the required dry film thickness, use a wet film gauge while installing the roof coating or a dry film gauge after roof coating job is complete.

A moisture survey can help identify areas with trapped moisture and wet insulation. Doing this prior to restoration and coating can help mitigate problems.

Lexis acrylic elastomeric coatings are recommended for metal roofs. They provide the best bang for the buck. Rusted or pre-finished metal roofs should be primed. For more information, read Pros and Cons of Metal Roof Coatings.