What is upper surface solar absorptance value?

The Solar Absorptance (SA) of a surface is the fraction of the sun’s radiation that the surface absorbs. Roofing materials are classified using a solar absorptance value ranging from 0 to 1. Higher values indicate the surface absorbs a larger amount of solar radiation.

Is Zincalume a reflective?

Is Zincalume reflective? Unpainted Zincalume is considered a reflective material with a colour similar to off white Colorbond materials. Zincalume’s highly reflective surface is a natural reflector of harsh sunlight.

Is Zincalume heat resistant?

The panels’ resistance to all elements proves that Zincalume is one of the toughest steel materials available. Zincalume steel also offers long-lasting performance. Like Colorbond, it is thermally efficient, highly resistant to corrosion and easy to maintain.

What are the properties of Zincalume?

Product. ZINCALUME® G550 steel is a hot-dipped Al-Zn alloy coated structural steel with a regular spangle surface and guaranteed minimum yield strength of 550 MPa with limited ductility.

How is solar absorptance calculated?

The irradiance below 300 and above 2500 is very small, so that you can use your measurement to obtain the solar absorptance, as the integral of your reflected irradiance divided by that of your incident irradiance.

What colour is Surfmist?

Surfmist® Surfmist® embodies qualities of freshness, purity timelessness and independency. Snow, the mist from the sea and surf, pure white sand, and the billowing sails of yachts all remind us of this colour.

Which is better Zincalume or Galvanised?

Because the coatings on galvanised steel and ZINCALUME® steel perform in different ways, ZINCALUME® steel has much better corrosion protection (and service life) than galvanised steel.

Does Zincalume need paint?

ZINCALUME® coated steel is readily paintable using good quality primers and water-based acrylic topcoats. Paint manufacturers’ instructions should be followed. Dirt, grease and any loose material must be cleaned off so the surface is clean and dry prior to the first coat being applied.

What is the difference between Aluzinc and Zincalume?

There is no difference in quality between Aluzinc and Zincalume, local and international specifications pertaining to the coating make no mention of Aluzinc and Zincalume. These are brand or trademark names used by manufacturers of coated steel.

How long does a Zincalume roof last?

From its launch in August 2013, roofing applications made from next generation ZINCALUME® steel will be backed by a warranty of up to 36 years, including warranties closer to marine environments.

What is G550 steel?

ZINCALUME® G550 steel is a hot-dipped zinc/aluminium alloy – coated structural steel with a spangled surface and a guaranteed minimum yield strength of 550 MPa with limited ductility.

What is Aluzinc sheet?

Aluzinc material is hot dip process of Aluminimum and Zinc metal(Aluzinc Steel Sheet (55% Aluminum-Zinc Alloy Coated Steel Sheet). It gives high rust prevention and can be used bare with you any futher coating. Thickness:0.25mm~3.2mm. Width : Full width coil/sheet or slitted to size in coil or sheet.