How long the metal roof color will last

Guest User
7/27/2004
I have experienced barns with metal roofs and they appear to last a long time and often look unsightly in their latter years. So when you say a metal roof lasts for 40 to 60 years, what are you referring to: The color not fading or the metal not rusting? Exactly what is the state of your roof concept at the 40 year point in time?? Thanks, Gordon
Guest User
7/27/2004
Allan Reid
Dura-Loc Roofing Systems, Inc.
7/28/2004
This depends on the quality of metal roof system that you choose. The Metal Construction Associaction has published min performance guidelines to which our member manufactures adhere to in the MRA. Basically for an exposed steel roof, you need to use Aluminum Zinc coated. Here as well you can specify the coating weight of AZ50 or AZ55 which is the heavier coating and provides longer life. The trade name is called Galvalume and it has been in use since 1972 and has a life exopectancy 2-6 times that of galvanized. Then comes the coating sytem. You can get various types of painted and granular systems. The best paint is a PVDF at a minimum 70% resin content that are offered with a 30 year coating warranty and the granular comes generally with 25 yr warranties.
Guest User
8/2/2004
Your response to the question provided by Allan missed the point. Provided a person buys the best quality metal sheeting, will the paint fade. How long before this is noticable? How does one prevent this or correct the problem if is occurs? My previous question to Tom was: Thanks for all of the information. I plan on using the sheet metal type metal roof when I replace my shake roof. How well do the colors hold up? Do they fade? If so, can they be repainted? Do some colors hold up better than others?
Guest User
8/3/2004
The recognized highest quality paint system in terms of fade and chalk are the systems sold under trade names of Kynar and Hylar. If you have this type of paint system, that is best. They typically carry 20 or 30 year fade and chalk limitation warranties. Yes, some fade and chalk will occur but it is warranted to stay at a small degree. As far as repainting, sure, after 40 years or whenever deemed appropriate, these systems are suitable for repainting. Actual amount of fade will be determined by sun exposure so it will be greater in sunny areas. However, the general feeling is that it will not be terribly noticable within the warranted period. Your roofing manufacturer should be able to provide mor info.
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