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2. Metal roof - Wikipedia

   en.wikipedia.org/wiki/Metal_roof

   A metal roof is a roofing system ... for installation and material costs but last ... 18% but costs only about $2.00–$3.00 per watt of installed capacity, compared ...

3. Flat roof - Wikipedia

   en.wikipedia.org/wiki/Flat_roof

   A study by Ducker International in 2005 identified the average cost per year of a metal roof to be US$3.2 per square metre ($0.30/sq ft) while single-ply roofs stood at $6.1/m 2 ($0.57/sq ft) and built-up roofing at $4.0/m 2 ($0.37/sq ft).

4. List of commercially available roofing materials - Wikipedia

   en.wikipedia.org/wiki/List_of_commercially...

   Standing-seam metal roof with concealed fasteners. Mechanically seamed metal with concealed fasteners contains sealant in seams for use on very low sloped roofs, suitable for roofs of low pitch such as 0.5/12 to 3/12 pitch. Flat-seam metal with or without soldered seams. Steel coated with a coloured alloy of zinc and aluminium. Stone-coated ...

5. Gothic-arch barn - Wikipedia

   en.wikipedia.org/wiki/Gothic-arch_barn

   It was the most popular roof design for barns sold by Sears. [7] In 1915, Sears sold a 42-by-60-foot (13 m × 18 m) Gothic-arch barn for $1,500. All materials were pre-cut and finished and shipped by railroad to the customer for local assembly. [2]

6. Cost estimate - Wikipedia

   en.wikipedia.org/wiki/Cost_estimate

   A cost estimate is the approximation of the cost of a program, project, or operation. The cost estimate is the product of the cost estimating process. The cost estimate has a single total value and may have identifiable component values. A problem with a cost overrun can be avoided with a credible, reliable, and accurate cost estimate. A cost ...

7. Caffeine Can Disrupt Sleep Even 12 Hours After You've ... - AOL

   www.aol.com/caffeine-disrupt-sleep-even-12...

   Per the research, "no significant effects were observed for the consumption of the 100 mg dose of caffeine across each time point." The 400 mg dose had varying effects, and would "significantly ...