Pinning Down Metal Roof Gauge

Guest User
11/21/2009
I am looking at samples of several roofing products. Two of them claim to be 26 gauge, but they feel very different. One is clearly lighter than the other. Can I use a micrometer to test the thickness and figure out which one really is 26 gauge? Is there a chart that would tell me the appropriate thickness for the 29, 26 and 24 gauge of roofing materials? Please review and advise. This is very important to me. Sincerely, Michael Davis
Todd Miller
Isaiah Industries, Inc.
11/23/2009
As long as you gauge a flat area of metal, sure you can check it with micrometers. I have long been a proponent of the industry looking at steel roofing in terms of decimal thickness rather than gauge. Too many games can be played with gauge in regards to tolerances, with paint, without paint, etc. You can find charts referencing gauge and decimal thickness but as you will see there is a wide range of tolerance on decimal thickness for each gauge.
Guest User
12/4/2009
I am a college student and currently doing a feasibility study on production of corrugated roof sheet out of post-consumer PET bottles but I don't know much about the details of a roof. What are the important specifications of a roof sheet(aside from thickness,width and length)? What is the most common dimensions of a roof suitable for household use? Your reply would be a great help on my study. Thank You!
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