Red Corrosion

Red corrosion, or corrosion at the edges of the profiled steel cladding should be prepared as follows:

Manually de-scale and remove all white and red rust by abrading to bright, firm metal, ensuring that the surface is as smooth as possible. Thoroughly clean the roof as described previously and neutralise the corrosion reaction with a commercially available metal cleaner made for this purpose.

Coat the whole prepared areas with a water based galvanised iron primer and apply two topcoats of acrylic roofing paint to the dry, primed area.