Every time an installer looks at a new job, the condition of the substrate needs to be reviewed thoroughly to determine if the surface to be tiled is adequate. If the surface is contaminated in any way, the architect, general contractor and/or the owner must be notified by letter or email.
All too often, the jobsite visit will reveal that the concrete floor has an off-white or light beige-colored primer residue on almost the entire floor from the careless painter coating the ceiling. The spray-applied primer is “designed” to be completely dry before it falls to the floor, which allows it to be swept away easily. However, any installer who has been on a construction site knows this is usually not the case. Instead, that paint is now well-bonded to the concrete and is not able to be removed with a six-inch flat blade or a razor scraper.