Efflorescence Risk Calculator
Review the calculator's simple condition score. It adds fixed points for selected exposure, drainage and mortar inputs; it is not a validated probability or diagnosis, and its suggested treatments need independent review.
How the estimate works
Current score = 50 for marine exposure + 30 for poor drainage + 10 for type O mortar. Above 70 is labelled High; above 40 is Medium; otherwise Low.
Metric worked example
Inputs: Marine exposure; poor drainage; type O mortar
Working: 50 + 30 + 10 = 90 points
Result: The tool labels 90 points High; this is a heuristic score, not a probability
Units and regional checks
Efflorescence depends on site moisture, materials and construction details. Inspect water sources and consult product/project guidance; do not treat the score as a diagnosis.
Frequently asked questions
Does a high score prove efflorescence will occur?
No. It is a basic heuristic score, not a validated probability or diagnosis. The tool's recommended treatments are not a substitute for assessing the cause.
Open the interactive calculator