回复：请教： 更换屋顶的合同纠纷

来源: farmerabc 于 2013-05-01 17:42:14 [] [旧帖] [给我悄悄话] 阅读数 : (392 bytes)
回答: 请教： 更换屋顶的合同纠纷 由 lilly888 于 2013-04-29 14:05:49

Most states allow shingle on top shingle. It is a normal practice, as long as total layer of shingle is less than 4. Most roofer will do that, it has better protection and less chance of leak. See the reference.

http://www.roofer911.com/roofing-articles/roof-shingles-layers.htm

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