What is the difference between zincalume and galvanised

My take on it is this - The corrugated iron is now zincalum finished or colorbond finnished I don't know what the old corrugated iron was I know at work when we dip metal into molten zinc it looks like zincalume after its cooled down. Gal is plain zinc, I think the real old stuff mighta been hot dipped , dunno about the later stuff. Information from the horses mouth. Both Zincalume and Gal are hot dipped continuously on a machine that unrolls the flat steel coil on one end of the machine through a bath of molten zincalume or gal and the thickness of the coating is controlled by a blast of air across the surface of the steel and when it comes out of the machine it is rolled up again into a coil that can be up to 10 tonnes in weight.

This machine runs at high speed and and never stops through what is called an accelerator that allows them to join and cut the flat strip whilst the machine is continuously running. The Colorbond is painted in a similar manner except it runs through a horizontal oven to dry the paint and the steel strip is supported on a cushion of air that runs for about 50 to 75 metres in length.

The gal coating is actually pure zinc and the zincalume is a mixture of zinc and aluminium. Gal has a larger spangle than zincalume. As was said earlier gal will dull off to a dark grey and the zincalume will hold its shine for a very long time. You can run water of gal onto zincalume but if you run water off zincalume onto gal the water will begin to remove the gal coating and expose the bare metal hence it will begin to corrode.

Regards Bazza Skype Username: bazzabushy "Experience is a hard teacher because she gives the test first, the lesson afterwards. The poster accepts no responsibility if this advice is used.

When undertaking any work personal professional advice should be sought from suitably qualified persons in the field of work being undertaken. According to the bluescope steel site " ZnAl steel imparts corrosion resistance of up to four times the life of galvanised steel. Aluminium forms a thin metal oxide coating over the steel reducing the amount of oxygen getting through to the steel underneath. The zinc acts as a sacrificial metal that grabs any oxygen preferential to the iron in the steel.

Ok here is an even harder question I ordered gal from my supplier - lots of pre cut sheets - it has arrived and now my supplier has rung me to tell me that he made a mistake and ordered zincalume - should I put up with it and take it?

I wanted gal but I am trying to work out whether zinc will be have much more shine. So we move onto ethics! Gives it that motley colour. The 'flakes ' on gal are much larger than zincalume. I'd stick with the zincalume, it's a better, longer lasting product. No I am not near the coast - rather in Central Victoria - does Zincalume dull off or does it always stay shiny?

That's why my roof is Dune Grey Colorbond. I wanted the look but the local airport gets a bit ancy about tin roofs.

We specialise in the maintenance and installation of metal roofs. Our company will answer all of your questions, provide an accurate quote for your roof and deliver quality results. In addition, we serve both commercial and residential clients. At the completion of a roof installation or re-roofing project, we issue a guarantee of workmanship and materials for your protection. Zincalume coated steel cannot be soldered. You can join Zincalume steel the same way that is recommended for colour steel pre-painted steel products — use a neutral silicone sealant with mechanical fasteners such as blind rivets.

Zincalume is compatible with galvanised surfaces. There is a common misconception the two materials are incompatible. Zincalume is a combination of aluminium and zinc, which are adjacent to each other on the galvanic table. They are compatible with contact. Zincalume is designed for a variety of uses. Most commonly, Zincalume is used for architectural applications such as roofing panels, wall panels, metal tiles and metal building and construction applications.

One of the benefits of Colorbond roof is that they are quiet. Many roofing materials make a lot of noise when water rains on them, especially with metal roofing.

Colorbond roofing is known for being a lot quieter. Not sure what kind of roof is best for your property? Call us today to discuss your options with one of our friendly roofing specialists.

Colorbond roofing offers extreme durability, resistance to corrosion, and advanced technology that provides thermal […]. Both are close competitive products when it comes to your roofing. Either of the two are good, both affordable and very handy to use. We in the Islands use rain water for drinking. Is zincalume roofing safe for harvesting rain water. Just last Sunday night, I spoke to my brother who is looking to replace his current roof with colorbond roofing.

I am most fond of where you mentioned that colorbond roofing has the ability to withstand extreme weather conditions. Here is a text widget settings ipsum lore tora dolor sit amet velum. Maecenas est velum, gravida Vehicula Dolor. At Vertec Roofing, we do things differently. We offer a personalised roofing service at a reasonable price whilst delivering high quality work giving you the peace of mind that the job has been completed to your satisfaction.