Automatic Door Bottoms

Category Description:

Pemko Automatic Door Bottoms

Pemko Automatic Door Bottom Photo 4301CRL

  • Pemko automatic door bottoms provide a positive seal between the door and the floor or threshold when the door is closed. There are three basic designs:
    • Full-mortise mount. Suitable for wooden doors only. Installed in a deep mortise routed in the bottom edge of the door.

    • Surface mount. Suitable for wooden or metal doors. Screwed to the face of the door. This style may also be semi-mortised in a wooden door; in this case they are flush with the face of the door.

    • Commercial hollow metal door mount. Mounts in 13/16" deep channel in bottom edge of most commercial hollow metal doors (not for residential metal doors).

  • The photo at right shows the hinge end of a surface-mounted model installed on a wooden door. End plate is removed to show mechanism and neoprene seal. When the hexagonal plunger contacts the door jamb, the drop-bar is forced down to form a seal with the threshold.

How They Work:

  • Pemko automatic door bottoms consist of an aluminum case which surrounds a movable drop-bar seal. The drop-bar seal is actuated by a plunger which contacts the jamb as the door is closing, forcing the drop-bar seal down against the floor/threshold.

  • The patented mechanism causes the drop-bar seal to actuate on the hinge side first. This prevents the seal from skidding along the floor/threshold while the door is being closed, and the door will not hang up.

Pemko Drop Bar Seal for Automatic Door Bottom

Features of Pemko Automatic Door Bottoms:

  • NOTE: We recommend that these automatic door bottoms be installed by a carpenter or contractor or other person with experience hanging doors. Installation may involve rehanging the door and cutting it to height.  For the full-mortise styles, it also involves cutting a deep mortise in the bottom edge of the door with a router. Pemko does provide installation instructions.

  • Designed to seal up to a 3/4" gap under the door, except for the type designed for commercial hollow metal doors (Model #420), which seals a 1/2" gap.

  • Automatic door bottoms (in stock lengths) can be trimmed down in length by as much as 2"


If you don't see what you need here...

We can order you anything from Pemko at competitive prices! Just send us a message or call 800-260-5625


Product list follows:

Pemko Acoustic Automatic Door Bottom #PDB411 - Full Mortise Style

CODE: PDB411

$63.00
Pemko

Product Description: Pemko Acoustic Automatic Door Bottom #PDB411 - Full Mortise Style Catalog #PDB411 Unique patent-pending... More 


Pemko Automatic Door Bottom #411 - Full Mortise Style

CODE: PK411

$34.40
Pemko

Product Description: Pemko Automatic Door Bottom #411 - Full Mortise Style THIS ITEM was featured in FINE HOMEBUILDING MAGAZINE #198,... More 


Pemko Automatic Door Bottom #4131 - Surface Mount or Semi-Mortised Style

CODE: PK4131

$38.07
Pemko

Product Description: Pemko Automatic Door Bottom #4131 - Surface Mount or Semi-Mortised Style Catalog #PK4131 Suitable for... More 


Pemko Automatic Door Bottom #420 - Full Mortise Style for Hollow Metal Door

CODE: 420APKL

$32.49
Pemko

Product Description: Pemko Automatic Door Bottom #420 - Full Mortise Style for Hollow Metal Doors Catalog #420APKL  ... More 

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