How often should common areas be cleaned?
Frequency depends on foot traffic, season, building type and expected cleanliness level.

Observe without taking risks
Start by identifying visible signs without dismantling equipment or touching a potentially dangerous installation. Photograph the area and note when the problem occurs.
Limit the consequences
When it can be done safely, turn off the relevant supply, protect the area and avoid using the equipment until diagnosis.
Prepare the diagnosis
Provide the municipality, access details, age of the installation, symptoms and any previous work. This information helps with initial guidance.
Decide on the basis of the quote
Repair, replacement or renovation should be defined after assessment. The quote specifies scope, materials and planned stages.