National Guard Door Seals, Thresholds and Weatherstripping

Choosing National Guard Door Seals, Thresholds and Weatherstripping

National Guard Products offers thresholds, door sweeps, automatic door bottoms, perimeter seals, brush seals, rain drips, smoke seals, and related commercial opening components. Selection starts with the gap or opening condition that needs to be addressed. Measure the door width, threshold area, undercut, frame dimensions, and mounting surface, then consider weather exposure, traffic, accessibility, smoke control, and other project requirements.

Thresholds vary in height, width, profile, material, and mounting configuration. Those dimensions can affect accessibility and the transition between floor surfaces, so the exact profile should be checked against the opening. When replacing an existing threshold, compare both the overall width and the critical height and slope dimensions rather than choosing only by door width.

Door sweeps and automatic door bottoms address gaps beneath the door in different ways. Surface sweeps use neoprene, brush, or other sealing materials against the threshold or floor, while automatic bottoms are designed to drop a seal as the door closes. Confirm the available undercut, mounting side, door thickness, and contact surface before selecting a bottom seal.

Perimeter gaskets, smoke seals, rain drips, and brush seals are selected according to the frame condition and the performance needed at the opening. Adhesive-backed products require suitable mounting surfaces, while mechanically fastened seals require clearance for the retainer. Material choice can also affect durability, temperature performance, and resistance to weather or repeated door movement.

Commercial and rated openings can have accessibility, fire, smoke, and weather-sealing requirements that affect the complete assembly. Product dimensions and listings should be verified for the intended application rather than assuming every seal or threshold is interchangeable. Careful measurement of the existing door and frame is the most reliable starting point when selecting National Guard replacement hardware.