Door face or bottom edge
ANSI/BHMA A156.22 · UL 10C · NFPA 80
Maryland, DC & Northern Virginia
A door sweep is a strip of metal fitted with a rubber, vinyl, or brush insert. It mounts to the bottom of a door and closes the gap between the door and the floor or threshold. That small gap lets in drafts, rain, dust, bugs, and rodents. It also lets out heat, cool air, sound, and smoke. A good sweep seals the gap each time the door closes. For businesses, that means lower energy bills, cleaner floors, quieter rooms, and fewer pest problems year round.
Sealing the gap keeps heated and cooled air inside, which lowers HVAC load and utility costs.
A tight sweep blocks mice, roaches, and insects at one of their most common entry points.
Sweeps keep rain, snow, dust, and wind out, protecting floors, stock, and equipment near exterior doors.
King Locksmith and Doors Inc. is a commercial locksmith and door company serving Maryland, Washington DC, and Northern Virginia. We work with small businesses, government agencies, hospitals, hotels, schools, and large organizations. Our technicians measure each door, check the threshold and gap, and fit the right sweep for the job. We install, adjust, and replace sweeps on hollow metal, wood, aluminum, and glass doors. Every job is done neatly, on schedule, and built to last.
Not every door sweep fits every door. The right choice depends on the gap size, floor surface, door type, traffic level, and code rules. Use this guide to compare the main options before you buy.
Most commercial sweeps fall into three groups. Surface-mounted sweeps screw onto the face of the door and are the easiest to install. U-shaped door-bottom sweeps wrap around the bottom edge and seal both sides. Automatic door bottoms sit in the door and drop down when it closes.
Each style suits a different need. Surface sweeps work well on back doors. U-shaped sweeps protect worn door bottoms. Automatic bottoms are best for offices and patient rooms.
The insert does the real sealing work. Neoprene and EPDM rubber are tough and handle cold weather well. Vinyl costs less and works on smooth floors. Silicone stays soft for years and resists heat, making it a good pick for sound and smoke control.
Brush sweeps use dense nylon bristles. They fit uneven floors, rough thresholds, and doors with gaps that change size. They also let the door swing freely over floor mats and tile.
A sweep only works if it fits. Measure the door width from edge to edge, then measure the gap under the door at both ends and the center. Floors and thresholds are rarely level, so the gap can vary by a quarter inch or more.
Choose a sweep with an insert tall enough to cover the largest gap. Slotted mounting holes let us raise or lower the sweep for a snug seal that does not drag.
Heavy traffic calls for heavy-duty parts. Busy entrances in hospitals, hotels, and government buildings need aluminum or stainless steel sweeps with thick inserts. Light plastic sweeps wear out fast and can crack or pull loose after a few months of constant use.
Door material matters too. Hollow metal and wood doors take screws well. Aluminum storefront doors often need a sweep that matches the bottom rail. Glass doors use clamp-on sweeps that need no drilling.
Fire-rated doors need extra care. Any sweep or gasket added to a labeled fire door must be listed for that use under UL 10C and installed per NFPA 80. An unlisted sweep can put the door out of code and lead to a failed inspection.
Accessibility matters too. Under the ADA, doors must stay easy to open. We choose sweeps that seal well without adding drag, so the door closes and latches on its own.
Door sweeps and threshold seals both close the gap under a door. They work in different ways, though. Here is how a door sweep stacks up for most commercial doors.
Consideration
Door Sweep
Threshold Seal
Mounts to the door in minutes
Requires removing and replacing the threshold
Low part and labor cost
Higher cost for threshold and labor
Nothing added on the floor surface
Raised insert can create trip hazards
Insert is easy and cheap to replace
Foot traffic wears the seal down faster
Slotted holes allow height adjustment anytime
Fixed height cannot adapt to floor changes
Door sweeps take a beating every day. Most sweep failures are easy to spot once you know where to look. Watch for these common warning signs on your commercial doors.
We install new sweeps on hollow metal, wood, aluminum, and glass doors, cut to exact door width.
We remove worn, torn, or broken sweeps and fit heavy-duty replacements that seal tight and last longer.
We install mortise and surface automatic door bottoms that drop to seal only when the door closes.
We supply and install UL-listed sweeps and gaskets on fire-rated doors to help pass NFPA 80 inspections.
We pair sweeps with door shoes, rodent guards, and perimeter weatherstripping to seal the entire door opening.
We adjust sagging or dragging sweeps and tune door closers so doors seal, close, and latch properly.
Get a free on-site assessment of your door sweeps. We serve businesses and agencies across Maryland, DC, and Northern Virginia.
