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  2. Soft washing - Wikipedia

    en.wikipedia.org/wiki/Soft_washing

    Soft washing is a cleaning method using low pressure water. More recently, the term "softwashing" has been used to describe any form of spraying chemicals at buildings where solutions (typically sodium hypochlorite based softwashing chemicals) are used to remove mildew, bacteria, algae and other organic stains from roofs and other building exteriors.

  3. Roof - Wikipedia

    en.wikipedia.org/wiki/Roof

    A roof (pl.: roofs or rooves) is the top covering of a building, including all materials and constructions necessary to support it on the walls of the building or on uprights, providing protection against rain, snow, sunlight, extremes of temperature, and wind. [ 1 ] A roof is part of the building envelope.

  4. Roof shingle - Wikipedia

    en.wikipedia.org/wiki/Roof_shingle

    Roof shingles are a roof covering consisting of individual overlapping elements. These elements are typically flat, rectangular shapes laid in courses from the bottom edge of the roof up, with each successive course overlapping the joints below. Shingles are held by the roof rafters and are made of various materials such as wood, slate ...

  5. Roofer - Wikipedia

    en.wikipedia.org/wiki/Roofer

    A German roofer installing a reed roof, wearing the traditional vest and trousers of a craftsperson. A roofer, roof mechanic, or roofing contractor is a tradesman who specializes in roof construction. Roofers replace, repair, and install the roofs of buildings, using a variety of materials, including shingles, single-ply, bitumen, and metal.

  6. Pressure washing - Wikipedia

    en.wikipedia.org/wiki/Pressure_washing

    Pressure washing or power washing is the use of high-pressure water spray to remove loose paint, mold, grime, dust, mud, and dirt from surfaces and objects such as buildings, vehicles and concrete surfaces. The volume of a mechanical pressure washer is expressed in gallons or liters per minute, [1] often designed into the pump and not variable.

  7. Chernobyl liquidators - Wikipedia

    en.wikipedia.org/wiki/Chernobyl_liquidators

    Chernobyl liquidators. A group of liquidators gathered at the Museum of Slavutych on the 32nd anniversary of the Chernobyl disaster, 2018. Soviet military badge (left) and medal awarded to liquidators. The central detail of the Liquidators' medal, with traces of alpha (α) and beta (β) particles and gamma (γ) rays over a drop of blood.

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