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Finish on zinc coated steel coil for prefabricated housing

July 2, 2021

Q. Hi everyone,

The building company I am working for is developing the prefabricated housing market. We have been buying our zinc-coated steel coils from Turkey so far but prices have gone through the rough. We are looking at other sources.

We've come to realize that the surface finish of 1st batch of coil bought is very different from what new sources have to offer. 1st batch Supplier is not saying much, just that it's standard zinc coated coil.

61283-1

Would any of you know why this coating looks so different from spangle / spangle-free coatings?

Coil specs are : ZN275 / 1.5mm thickness / 243mm width.

Thank you for your help. Great forum.

Florian Chauvin
- Saint Denis - La Reunion

A. Hi Florian. My guess is that this is a photo of a coil of ZN275 galvanneal rather than plain galvanizing. It will be somewhat more expensive because of the extra operation, but some people like the appearance better, and it's more paintable if that's a factor.

Luck & Regards,

Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
July 2021

July 5, 2021

Thank you so much Ted for your answer.
Coil will used to make light steel framing for residential houses.

If you ever travel to our beautiful island, feel free to get in touch. I will be happy to assist.

Florian Chauvin
- Saint Denis

July 2021

Hi Florian. I don't know if that will happen, but I hope it does because the people sound as lovely as their island :-)

Luck & Regards,

Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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