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Pre-painted Steel Sheets
The Base Metal:
To ensure the maximum protection against the elements, our base metal is cold rolled, electro galvanised hot-dip aluminium-zinc (55% Al-Zn) coated steel sheet.
The hot-dip alu-zinc coated steel sheet gives 2 to 5 times the corrosive resistance of the standard hot-dip zinc coating.
The colour is stable up to ambient temperatures of 316 degrees centigrade. While being free of oxidation or oxide scaling up to temperatures of 490 degrees centigrade.
Heat and light reflected off the steel is twice that of hot-dip zinc, with a reflectivity exceeding 0.75, easily surpassing the 0.65 required by the EPA Energy Star Standard.
Our cold rolled hot-dip Al-Zn steel sheet is the perfect material for the construction industry, coupling high resistance to corrosion and long lasting durability of colour, with excellent insulation and energy saving qualities.
The Coatings:
Our standard sheet steel is coated with polyurethane based primer, followed by a top coat of Polyvinylidene Fluoride. This combination gives excellent chemical, chalking, solvent, and UV resistance, coupled to high flexibility, exceptional durability, excellent resistance to dirt, and high colour retention. We consider this permutation of primer and top coat gives the best all round protection of our steel sheet.
We also offer epoxy, polyester, and water-soluble acrylic acid based primers, and a full range of polyester top coats if desired. Details are available on request.
Our steel sheet is prepared and coated in precisely the same way as the steel used in the construction of the workshops at Fitzpatrick Nuclear Power Plant in the USA, which was constructed in 1971. As of this date (April 2008) the steel is still perfect, with excellent retention of colour.
We offer a quality guarantee of our steel and coatings of 20 years.
Insulation materials:
We offer a choice of three insulation materials.
Polyurethane: This is the material used in all our basic twin walled insulated sheets. It comes in a choice of thicknesses dependant upon the U value required on any given building, from 25mm to 150mm. Polyurethane offers the best thermal qualities, for the lowest section of all our insulated sheets.
Rock-wool: This is the insulation material of choice where environmental considerations take precedent over thermal performance and structural integrity. It is completely environmentally friendly, and easy to handle. However, on average, the wall and ceiling panels will be approximately twice as thick as Polyurethane to achieve the same thermal performance. It is cheaper than Polyurethane, but costs more to ship due to its higher volume, so usually the higher shipping cost cancels out the lower material cost.
Expanded Polystyrene (EPS): This insulation material is cheap, very light, provides excellent thermal insulation and structural performance coupled to a very long life. It also has excellent sound-proofing qualities. In the right building, it could be precisely the insulation material of choice. It is not recommended for use in high density urban areas, due to the emission of toxic fumes if burned.
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