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  2. Membrane roofing - Wikipedia

    en.wikipedia.org/wiki/Membrane_roofing

    Membrane roofing is a type of roofing system for buildings, RV's, Ponds and in some cases tanks. It is used to create a watertight covering to protect the interior of a building. Membrane roofs are most commonly made from synthetic rubber, thermoplastic (PVC or similar material), or modified bitumen. Membrane roofs are most commonly used in ...

  3. Roof coating - Wikipedia

    en.wikipedia.org/wiki/Roof_coating

    As such, the roof coating is the topmost layer of protection for the membrane, receiving the impact of sunlight (both infrared and ultraviolet (UV)), rain, hail and physical damage. Roof Coatings should not be confused with deck coatings. Deck coatings are traffic bearing - designed for waterproofing areas where pedestrian (and in some cases ...

  4. Covering problems - Wikipedia

    en.wikipedia.org/wiki/Covering_problems

    Covering problems. In combinatorics and computer science, covering problems are computational problems that ask whether a certain combinatorial structure 'covers' another, or how large the structure has to be to do that. Covering problems are minimization problems and usually integer linear programs, whose dual problems are called packing ...

  5. Grand Canyon waterline breaks: How to salvage your vacation - AOL

    www.aol.com/grand-canyon-waterline-breaks...

    September 3, 2024 at 7:04 AM. Grand Canyon National Park has announced it will temporarily halt overnight stays on the South Rim (affecting El Tovar, Bright Angel Lodge, and Maswik Lodge, plus ...

  6. Cadmium exposure may be linked to memory problems in ... - AOL

    www.aol.com/cadmium-exposure-may-linked-memory...

    Cadmium, a toxic heavy metal found in polluted air, cigarette smoke, and food, was found to have a higher impact on cognitive ability in white people, a new study suggests.

  7. FEMA trailer - Wikipedia

    en.wikipedia.org/wiki/FEMA_trailer

    FEMA trailer. The term FEMA trailer, [1][2] or FEMA travel trailer, is the name commonly given by the United States government [3] to forms of temporary manufactured housing assigned to the victims of natural disaster by the Federal Emergency Management Agency (FEMA). Such trailers are intended to provide intermediate term shelter, functioning ...

  8. Impervious surface - Wikipedia

    en.wikipedia.org/wiki/Impervious_surface

    Impervious surfaces are mainly artificial structures—such as pavements (roads, sidewalks, driveways and parking lots, as well as industrial areas such as airports, ports and logistics and distribution centres, all of which use considerable paved areas) that are covered by water-resistant materials such as asphalt, concrete, brick, stone ...

  9. Flashing (weatherproofing) - Wikipedia

    en.wikipedia.org/wiki/Flashing_(weatherproofing)

    In modern buildings, flashing is intended to decrease water penetration at objects such as chimneys, vent pipes, walls, windows and door openings to make buildings more durable and to reduce indoor mold problems. Metal flashing materials include lead, aluminium, copper, [1] stainless steel, zinc alloy, and other materials.