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Last edited 27 Jul 2021
A hatch is an opening in a building (or other structure) that has been fitted with a cover that closes and opens. Generally, a hatch in a floor, wall or roof enables the passage of people or goods from one place to another. It may also be used to provide ventilation or to control moisture or temperature.
A roof hatch may be an opening installed in a flat roof. These hatches can be pre-fabricated, assembled and put in place prior to the installation of the roof. Waterproofing gaskets around the hatch can be used to protect against water penetration. Roof hatches may accommodate a ladder, so maintenance crews can access rooftop equipment. They may include smoke or fire safety devices to allow them to open if dangerous conditions occur.
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