Automatic Door Bottom

Lead Time: 5-10 DAYS
Grouped product items
Product Name Qty
ADB Mortised for up to 36" length
$95.00
ADB Surface for up to 36" length
$95.00
  • Pricing based on 36" length or less
  • Surface mounted, semi-mortised, or fully mortised automatic door bottom
  • Lead Time: 7-10 days on custom lengths
  • Stock sizes of 36", 32", and 30" are inventoried at our Georgia for quick shipping.
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The largest opening to seal on a door is between the bottom of the door and the floor or threshold below. The most effective way to isolate this opening is with the ADB Mortised or ADB Surface. The ADB stands for automatic door bottom with automatic referring to how the auto door bottom will raise or lower the rubber seal as the door opens or closes. The metal plunger on one side of the automatic door bottom seal comes in contact with the door jamb as the door opens and closes. This function will keep the rubber seal from dragging across the floor, prolonging the life of the rubber and allowing the door to open and close smoothly without additional closing force.

What separates our automatic door bottom seal from others available is the uniform seal pressure across the entire bottom of the door along with the double rubber seal. The double rubber seal creates a 3/8" dead air space increasing performance significantly over solid rubber or foam seals.

There are two styles of the auto door bottom, the fully mortised (ADB Mortised) and surface mounted or semi-mortised (ADB Surface). The performance and function of these two styles are the same, only the installation and appearance are different.

Each ADB ships with the required fasteners along with full installation instructions from the manufacturer. A brief description of each installation can be found below.

ADB MORTISED

The ADB Mortised is installed in the center of the bottom of the door. When installed, it is not visible from either side of the door and only a small amount of rubber drops beneath the door, typically around 1/4" to 3/8". Several small screws are provided to attach the ADB Mortised into the bottom of the door slab.

ADB SURFACE

The ADB Surface is installed on the surface of the door slab between the door stops. You can also semi-mortise the ADB Surface by recessing the door bottom into the door with one side of the door bottom flush with the door slab. When installed, it will be visible from one side of the door with the rubber dropping between 1/4" to 3/8". Three large screws are provided to attach the ADB Surface into the slab.

ADB Mortised Product SpecsPDF 91 KB

ADB Mortised Specs
Dimensions 9/16" thick x 1-3/8" tall
Length Standard 36", available range of 12" to 60"
Finish Clear aluminum
STC Rating Tested to show zero loss in performance for doors up to STC 56
Other Ratings UL10C for fire, UL1784 for smoke, BHMA A156.22, ASTM E-283 for air infiltration, ASTM E-90-97 and ASTM EI408-91 for sound control

ADB Surface Product SpecsPDF 84 KB

ADB Surface Specs
Dimensions 9/16" thick x 1-7/8" tall
Length Standard 36", available range of 12" to 60"
Finish Clear aluminum or dark bronze
STC Rating Tested to show zero loss in performance for doors up to STC 56
Other Ratings UL10C for fire, UL1784 for smoke, BHMA A156.22, ASTM E-283 for air infiltration, ASTM E-90-97 and ASTM EI408-91 for sound control