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The Lumen Rooflight Paint Details pdf file on our website is produced by Akzo Nobel and should be used for general guidance only. It represents typical values of life to first maintenance. Costal location rooflight FAQs can be found here
The location of your rooflight installation will have a significant influence on the lifespan offered by the protective paint system. Coastal rooflights or those used in areas of high humidity or areas deemed to have an aggressive atmosphere will require different paint to those in urban and industrial atmospheres with moderate sulphur dioxide pollution.
Most rooflight manufacturers will use a single paint specification as standard that will need to be upgraded for the harshest environments. As such, it is always advisable to speak to your rooflight company about rooflights located in a coastal area or high pollution surrounding.
Unless specifically requested, all Lumen Conservation and Lumen Planus rooflights are manufactured with mild steel and are treated with an iron phosphate before we apply an Interpon APP120 coating prior to the application of a Cromadex Extra Life coating system for C3 Environment *(see below). As well protected as our products are, the harsh salty environment of a costal location and will result in the faster deterioration of the protective coating and ultimately the metal. As such we do not recommend installation of our standard range in coastal regions or areas which are subject to a corrosive or polluted environment.
Although any paint system can be used in any location, the severity of that location reduces the design life (to first maintenance). Our C3 paint specification would be expected to last less than 6-12 months in certain C4 or C5 environments. That compares to 12 years to first maintenance of our standard product in a C3 environment. For rooflights that require extra protection we shot blast the steel, apply a PZ790 primer and then the Interpon top coat. This will provide a first maintenance life of up to 9 years in C4 and 3 years in C5.
If your skylight is likely to be located in an environment deemed harsher than C3, please talk to us about upgrading to C4/C5 or alternatively using stainless steel.
Industrial coatings are no different to the paint on your car - they need cleaning and maintaining. Accumulated dirt may affect the design life of the system, and any mechanical damage almost certainly will. Therefore regular inspections should take place and minor damage must be touched up.
At the end of the design life, major maintenance must be carried out. This includes spot priming where necessary, and as a minimum, rubbing down and applying a full coat of the original topcoat when wet paint was used. If powder was originally applied then a suitable Cromadex wet paint system should be used.
* Paint standards - ISO 12944 Paints & Varnishes - Corrosion Protection of Steel Structures by protective paint systems (parts 1-8) (1998) ISO 12944 Classification C3 = Urban and industrial atmospheres. Moderate sulphur dioxide levels. Production areas with high humidity; definition of coastal is less than 5000 metres from the sea.
The paint provides the protection for the metal on your rooflight. It is essential that you tell us if your property is located less than 5000mts from the coast or is situated in a high salinity or aggressive environment as failure to do so will invalidate your warranty.
If the coatings have been breached by damage sustained in transit or on site, action should be taken before the rooflight is installed. Such damage can completely undermine the protective coatings regime to a rooflight if left untreated.
The Lumen Rooflight Paint Details pdf file on our website is produced by Akzo Nobel and should be used for general guidance only. It represents typical values of life to first maintenance. "First maintenance" is described as the time span from new to repainting of the rooflight assembly in part/parts or in whole, and distinguished from "touching up" of the paint finish or regular maintenance.