By sempak. Door. Published at Sunday, September 24th, 2017 - 19:49:58 PM.
Other than the inner foam, these doors have other insulating enhancements in the form of high efficiency sealing systems to further keep out sound and the elements.
Disadvantages: The aluminium doors are not oxidation resistant thus; oxidation appears in them in the either form of residue or pitting. The risk of being corroded always exists with aluminium doors, if certain precautions are not taken from time to time.
Plus, although \"fire doors\" can be purchased, businesses still receive excellent protection against the spread of fire with steel security doors. Steel doors also provide increased energy efficiency, since they insulate the cold air from outside up to 4 times better than wooden doors.
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