WHAT’S NEW?


This can be checked by carrying out a cross hatch adhesion test on a sufficient number of elevations (differently exposed elevations may give different results). Where the adhesion is insufficient, the elevation should be completely stripped of old coating before applying three coats of Bradite One Can. Intact areas will only require two full coats, with a recoat possible after one hour. This means projects can be completed in a shorter time, meaning less downtime and more profit.


Preparation


BRADITE ADVISES ON COMMERCIAL CLADDING


REFURBISHMENT Cladding - the profiled exterior and predominately metal finish to industrial and commercial buildings, is mostly coated in the production process which gives it a life of approximately 20 years before it starts to discolour. Both flexible and adaptable, it can be painted over at any point during its lifetime, the process normally being relatively quick with minimal disruption.


Suitable surfaces


Most common external cladding on buildings can be over coated using Bradite One Can which is both primer and finish, with excellent adhesion and anti-corrosive properties. Steel and non-ferrous metals must be properly prepared and primed while wood, fibreglass, concrete and mineral substrates should be free of contamination, dust and efflorescence. Suitable existing epoxy and polyurethane coatings should be cleaned and abraded as necessary.


Most external cladding will last for a period of between 10 and 20 years before any maintenance is needed. The deterioration is usually gradual and will move from simple chalking or colour fading, to failure of the coating. This is followed by corrosion of the protective zinc or aluminium alloy under the decorative coating and finally by failure of the steel


22 | TOMORROW’S FM


substrate itself. When the steel substrate itself has failed, it is usually by perforation or excessive steel thinning by corrosion. This is when the cladding needs to be replaced.


Up until the corrosion and failure of the steel substrate itself, Bradite’s One Can can be successfully used to upgrade the cladding and extend its life by up to 10 years.


Bradite One Can is a cross linking, anti corrosive water thinned coating that’s easy to apply and can offer a 10-year maintenance cycle. Full BS 4800, RAL and NCS Colours are available, while specific corporate colours can be achieved by using Bradite’s extensive colour mixing database and can match specific corporate colours.


Atmospheric exposure conditions


In an industrial environment, corrosion is mainly caused by a high level of airborne sulphur dioxide or other pollution from industrial and domestic processes combined with high moisture levels.


In a marine environment, corrosion is mainly caused by a high level of salt, carried as salt spray and combined with high moisture levels. Salt spray can be carried up to three kilometres inland depending on the prevailing winds.


Specification


It is essential to ascertain that current cladding coating still has good adhesion, before over coating.


twitter.com/TomorrowsFM


As in any decorating project, good preparation is the key to a successful finish. Bradite recommends high pressure water cleaning to remove all loose and flaking paint, salts and other contaminants. A detergent like Bradite TD39 should be used combined with scrubbing and high- pressure water cleaning to remove any oil contamination not removed by high pressure cleaning alone. Rusted and damaged areas should be mechanically or manually prepared to SIS St 3, clean metallic appearance with little or no rust present.


An intact area of galvanised steel or aluminium substrate should be primed with a first coat Bradite One Can. Care must be taken to ensure that the minimum thickness given in the available data sheets is achieved on the edges of the cladding profile as well as the flat surfaces. It is advised that application by brush and roller may not achieve the required dry film thickness and may then require extra coats.


www.bradite.com


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66