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Fire doors
Fire doors are designed to offer an extra layer of protection and to prevent the spread of fire. These specialty doors are made of materials like steel gypsum and vermiculite boards and are made with fire-rated seals around the edges. The seals are generally composed of an intumescent strip that expands 600 times under heat and neoprene weatherstripping.
Some fire doors are also manufactured with fire-resistant internal windows made of wire mesh glass, ceramic and borosiliac glasses filled with liquid sodium silicate between panes. These specialty doors are often found in buildings with multiple floors and stairwells.
Fire doors are specially made using elements that stand up to fire conditions and have impact resistance as well. These doors are not usually used for residential or home applications, unless it is an apartment building with several floors and indoor hallways and stairways.
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