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Everyone knows that asphalt shingles can be walked on. What happens to a low-pitched baked-enamel tin roof when it is walked on? I understand that soft shoes should be worn. What about chipping and fading? We think our contractor will want to put the new roof over two layers of asphalt shingles. Is this okay?
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Every time you walk on any roofing material you will negatively affect the surface. With Asphalt shingles, you loosen the stone chip which acts as a UV block. The substate is vulnerable then and ages faster.
Metal finishes vary from very hard to soft. Typically the harder finishes resist scrathes better but chalk and fade quicker. All they need to do is walk with clean soft soled shoes. Regardless what one needs to remember is that if you buy the proper substrate and coating, you are putting on a permenant roof system which deserves a little extra care during instalation as you are expecting it to last over 3 times longer than an asphalt roof.
As to fading, if you are worried about this ensure that you buy a paint and substrate system that is guarenteed by the paint supplier. Typically you need to get a paint with ceramic pigments such as an SMP or Kynar 500 series paints that are certified by the Metal Construction Association.
As to roofing over existing, the building codes prohibit roofing over two layers of asphalt shingles.
Thanks for choosing metal and remember do it right and do it once.
12/9/2003
Or copy this URL: https://www.metalroofing.com/spirit/comment/2486/find/Dura-Loc Roofing Systems, Inc.
12/9/2003
Or copy this URL: https://www.metalroofing.com/spirit/comment/2487/find/