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  2. Snow guard - Wikipedia

    en.wikipedia.org/wiki/Snow_guard

    Three-pipe Snow Fence System Snow Guards in Jackson, WY, USA Standing seam metal roof with Snow guards to keep snow from sliding off the roof too quickly. A snow guard is a device used to retain snow and ice from falling from one surface to a lower one; in contemporary usage, they are installed to prevent snow/ice pack from avalanching and damaging people, plants, and property below.

  3. Metal roof - Wikipedia

    en.wikipedia.org/wiki/Metal_roof

    Metal roof. A metal roof is a roofing system featuring metal pieces or tiles exhibiting corrosion resistance, impermeability to water, and long life. It is a component of the building envelope. The metal pieces may be a covering on a structural, non-waterproof roof, or they could be self-supporting sheets.

  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. Mud weight - Wikipedia

    en.wikipedia.org/wiki/Mud_weight

    Mud weight. In the oil industry, mud weight is the density of the drilling fluid and is normally measured in pounds per gallon (lb/gal) (ppg) or pound cubic feet (pcf) . [1] In the field it is measured using a mud scale or mud balance. Mud can weigh up to 22 or 23 ppg. A gallon of water typically weighs 8.33 pounds (or 7.48 ppg). In ...

  6. Bitumen - Wikipedia

    en.wikipedia.org/wiki/Bitumen

    Bitumen typically contains, elementally 80% by weight of carbon; 10% hydrogen; up to 6% sulfur; and molecularly, between 5 and 25% by weight of asphaltenes dispersed in 90% to 65% maltenes. [18] Most natural bitumens also contain organosulfur compounds , Nickel and vanadium are found at <10 parts per million, as is typical of some petroleum. [ 6 ]

  7. Ice dam (roof) - Wikipedia

    en.wikipedia.org/wiki/Ice_dam_(roof)

    Ice dam (roof) Ice dam forming on slate roof. An ice dam is an ice build-up on the eaves of sloped roofs of heated buildings that results from melting snow under a snow pack reaching the eave and freezing there. Freezing at the eave impedes the drainage of meltwater, which adds to the ice dam and causes backup of the meltwater, which may cause ...

  8. Monel - Wikipedia

    en.wikipedia.org/wiki/Monel

    Monel is a group of alloys of nickel (from 52 to 67%) and copper, with small amounts of iron, manganese, carbon, and silicon. Monel is not a cupronickel alloy because it has less than 60% copper. Stronger than pure nickel, Monel alloys are resistant to corrosion by many aggressive agents, including rapidly flowing seawater.

  9. Tips to Choose the Right Gutter Guards or Gutter Covers - AOL

    www.aol.com/news/2008-11-04-are-gutter-guards...

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