Why is there rust at the bottom of many steel doors and doorframes?
Minnesota winters constantly expose doors and frames to snow, ice and salt — creating an highly corrosive environment.
Is there any way to combat rust?
Minneapolis Steel Door uses galvanized steel doors and frames fabricated from carbon steel sheets that have been coated with zinc on two sides with a continuous hot-dip process. Rust inhibiting primer is then applied. Once installed, appropriate coatings can also help prevent and mediate rust problems on doors.
What is hollow metal?
“Hollow metal” is an architectural term for steel doors and frames. Steel doors and frames (hollow metal) are manufactured using steel sheets that are bent to create a hollow metal shell which is then reinforced and filled with insulation. These are most commonly used on the exteriors of a commercial building where fire ratings are a concern. Steel doors are relatively inexpensive and can provide ratings up to 3 hours.
What is a welded steel doorframe?
A welded steel (or hollow metal) doorframe can be used for both interior and exterior applications. The frame consists of vertical jambs and a head. These 3 pieces are welded together at the corners to create a one-piece frame. Welded frames are assembled at our facility. Jambs are squared to the head, face and rabbet joints are welded, and all exposed weld marks are ground smooth.
Why are some doorframes filled with grout or mortar?
During the construction of a block (CMU) wall, some contractors fill the internal cavity of a steel doorframe with grout or mortar. It’s intended to provide sound deadening to the doorframe —but it’s typically not necessary and we don’t recommend it. Excess water from the grout filling process often causes steel frames to rust prematurely.
Will my new doorframe be filled with grout or mortar?
No. In applications where a grout-filled frame has been removed, we fill the replacement frame cavity with fiberglass insulation. Minneapolis Steel Door will not grout fill doorframes.
What is a knock-down frame?
Knock-down frames are not assembled and welded prior to delivery. They are sent as separate jamb and headpieces for assembly in the field by the installers.
What is a sidelite?
A sidelite in a building is a window, usually stationary and found immediately adjacent to doorways. Sidelites are typically narrow and can be attached or welded as part of the door frame.
Does the door I buy from Minneapolis Steel Door have a warranty?
Yes. Our manufacturers offer a one (1) year warranty from the date of shipment on all material manufactured to be free from defects in workmanship under normal use and service.