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| | Slate Roofing Shingles, Unfading, "On-The-Grain" (Site not responding. Last check: 2007-09-18) |
 | | Our slates have tested ASTM Grade S-1 (highest), are durable (lasting over 75 years), exceptionally strong and hard, have low absorption rates, are dense, acid-, heat- and salt-resistant, extremely resistant to freeze-thaw cycles and fireproof. |
 | | There are two issues to consider when specifying roofing slate: 1) the geology and characteristics of the deposit from which the material will be quarried, and 2) the quarrying and fabrication processes of the company that will actually produce the material. |
 | | When the blocks of slate are brought to the splitting shed, they're first crosscut against the grain with a diamond wetsaw. |
| www.vermontstructuralslate.com /slate_roofing.htm (881 words) |
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