Metal entrance doors: Technical characteristics
Metal doors made in all parameters are quite racks to atmospheric influences. In the manufacture of door blocks, they undergo anti -corrosion processing and can last a long time.
Insulate metal doors in the manufacture of various heat -saving materials. It can be foam, insulation (glass water).
Iron doors have a large fire resistance indicator. Of great importance is not only the fire of the tree, but also in the use, in terms of quality of the Mineral wool aggregate, because the melting temperature can be 1300C.
Good metal doors are always equipped with locks of various complexity, which are locked on four sides of the door leaf. Places where locks are installed are always enhanced by additional plates (metal). Such complexity is made so that the entrance doors cannot be opened by choosing keys.