What determines the life of a mineral wool panel façade?

Include areas sheltered from rain. Dirt can persist beneath eaves or between closely spaced buildings long after an exposed wall has been washed clean. Choose the coating for the actual exposure. “Galvanised steel” does not describe the whole protective system.

The organic finish and metallic coating shield the steel, not just its colour. The facings act together with the core; severe corrosion or lasting deformation may compromise the whole panel. Do not postpone a local repair merely because the building remains watertight.

Distinguish the warranty period, time to major recoating and service life of the wall. Fading need not indicate loss of structural usefulness, while concealed damage at a joint may need attention even on a façade that looks sound from a distance.

Start at the plinth, window heads, corners and service penetrations, where materials meet and runoff changes direction. Look for staining, corroded screws, lifted edges and old sealant. Repeated damp marks locate a problem but do not diagnose it.

Separate leaks from condensation indoors. Water following a downpour calls for different action from dew when a cold building is brought into use. Covering a wet spot with more flashing before diagnosis can hinder drying and hide further damage.

At handover mark inspection points on a drawing, note access and photograph the initial condition. Set inspection intervals from the system instructions and intensity of use. Check again after vehicle impact, installation work, storms or a suspected leak.

Clean only with agents approved for the coating. Avoid abrasion and unsuitable solvents. Agree how to rinse and protect joints; harsh cleaning can shorten façade life. Repeat photos from the same positions to distinguish new damage from old marks.

Inspect again after other trades finish. Installing cables or a canopy may leave swarf, new holes or scratches. An early check allows intervention before rust or leakage develops.

A small coating chip may need local protection. Extensive corrosion, delamination, permanent distortion or joint damage requires a broader assessment. Touch-up paint cannot repair every defect. Check whether the bond between facing and core is also affected.

Plan panel replacement around its fixings and adjacent flashings. Confirm the cover width, profile and colour are available. A new panel may stand out against a weathered wall. In a fire-resisting assembly the repair must retain the specified system and continuity of joints.

Compare access, cleaning and partial dismantling costs. Cheap panels are poor value if permanent equipment blocks repairs. Leave working room at the plinth and service penetrations while planning the building.

Keep coating specifications, inspection dates and repair records with the building documents. They help identify compatible materials later. Durable cladding depends on suitable products, sound workmanship and prompt attention to damage; none replaces the others.