Mortised

Fully Concealed  Mortised Automatic Door Bottoms are installed into a notch on the underside of the door. It has the advantage not being seen on the surface of the door. It is great for situations which aesthetics are of importance, such as with high end custom designed doors and luxury condos. They are best suited for hard flooring however then can be used on a carpeted area if a Doorway Threshold is installed directly beneath it.

Options for Surface Mounted Automatic Door Bottoms include high sound and standard sound control, fire and smoke rated, and light and air infiltration. Options for Metal Doors and Low Closing Force are available as well. As with all our products, these are made of heavy duty material that is guaranteed to last through many usages. Use our handy Compare feature to see the specifications and benefits of our Automatic Door Bottoms.

Select a product to get started. Don’t see what you need? Call us at 845-388-1300. Our trained staff will guide you through choosing a door bottom that best suits your needs.

Before starting, be sure to read Which ADB is Right for Me?
See also About Automatic Door Bottoms and How to Measure for an Automatic Door Bottom.

 

Products

 Zero #360, Automatic Door Bottom, Mortised, Heavy Duty with Sponge Neoprene Seal, 1" Drop
Bestseller
Zero #360, Automatic Door Bottom, Mortised, Heavy Duty with Sponge Neoprene Seal, 1" Drop
SKU: Z360AA|18

This Zero International #360, Fully Mortised, Heavy Duty, Sound Rated Automatic Door Bottom provides the best sound seal possible for normal sound levels, and will prevent infiltration of lights, drafts and more. Fitted with a sponge neoprene drop seal and high quality mechanism that has been successfully tested through 5 million cycles! Rated for fire, smoke and sound infiltration. Length is custom cut to size. View more details in tabs below.

 

 

Starting price $80.79 per item
Pemko #411 Automatic Door Bottom, Mortised Narrow Casing with Rubber Seals - .75" Drop
Bestseller
Pemko #411 Automatic Door Bottom, Mortised Narrow Casing with Rubber Seals - .75" Drop
SKU: P411APKL|36

Automatic Door Bottom has a drop down seal which is automatically lowered when the door is closed to seal the gap. Casing is made of aluminum mill, is fully mortised and will not affect the appearance of the door. Choice of three seal available and is custom cut to size up to 48" length.

PRICED PER RANGE

Starting price $40.80 per item
save 15%
Pemko #434 Automatic Door Bottom, Mortised, Heavy Duty, with Choice of Seals - .75" Drop
Bestseller
Pemko #434 Automatic Door Bottom, Mortised, Heavy Duty, with Choice of Seals - .75" Drop
SKU: P434APKL|36

These heavy duty automatic door bottoms require low closing force to actuate a drop down bar which lowers when the door is closed to prevent air, light, sound, fire, smoke, dust and moisture from coming through the gap under doors. Available with a PemkoPrene™ or EPDM seal.

CUSTOM CUT TO SIZE

How to Order: Selecting Seal Material and Size required will determine your total price. To determine size needed, see How to Measure for an Automatic Door Bottom

Starting price $75.65 per item
save 15%
TMH Automatic Door Bottom, Mortised, Heavy Duty with Neoprene Bulb Seal, 1" Drop - QuickShip
Bestseller
TMH Automatic Door Bottom, Mortised, Heavy Duty with Neoprene Bulb Seal, 1" Drop - QuickShip
SKU: T364A32

QUICKSHIP ITEM - This Fully Mortised, Heavy Duty Automatic Door Bottom will block sound, light and drafts by creating a strong seal at the bottom of your door. Fitted with a solid neoprene bulb seal and high quality mechanism that has been successfully tested through 5 million cycles! Rated for smoke and fire and length is available in stock sizes.

Starting price $82.59 per item
TMH Automatic Door Bottom, Mortised, Heavy Duty, Double Neoprene Seal, .562" Drop - QuickShip
TMH Automatic Door Bottom, Mortised, Heavy Duty, Double Neoprene Seal, .562" Drop - QuickShip
SKU: T369A32

QUICKSHIP ITEM - This Fully Mortised, Heavy Duty, High Sound Control Automatic Door Bottom with double neoprene bulb seal offers the best sound control for high sound levels and will prevent infiltration of light, drafts and more. Made with a high quality mechanism that has been successfully tested through 5 million cycles. Rated for smoke, fire and sound. Length is available in stock sizes.

Starting price $104.74 per item
Zero #350, Automatic Door Bottom, Mortised with Neoprene Seal, .75" Drop
Bestseller
Zero #350, Automatic Door Bottom, Mortised with Neoprene Seal, .75" Drop
SKU: Z350AA|36

This Zero International #350, Fully Mortised, Regular Duty Automatic Door creates a tight seal at the bottom of doors to prevent infiltration of sound, light, drafts and more. Fitted with a solid neoprene seal and high quality mechanism that has been successfully tested through 5 million cycles! This model is fire rated. Length is custom cut to size (see below for details).

Starting price $55.38 per item
Zero #364, Automatic Door Bottom, Mortised, Heavy Duty with Neoprene Bulb Seal, 1" Drop
Bestseller
Zero #364, Automatic Door Bottom, Mortised, Heavy Duty with Neoprene Bulb Seal, 1" Drop
SKU: Z364AA|36

This Zero International #364, Fully Mortised, Heavy Duty Automatic Door Bottom will block sound, light and drafts by creating a strong seal at the bottom of your door. Fitted with a solid neoprene bulb seal and high quality mechanism that has been successfully tested through 5 million cycles! Rated for smoke and fire and length is custom cut to size.

How to Order: Selecting Exact Size will determine your total price. Note, this product is priced per range with 18-1/4"-36" being the lowest priced range. To determine size required, see How to Measure for an Automatic Door Bottom.

Stock sizes - 32", 36" and 48" long are available to ship within 1 business day. Click here for our Quick Ship TMH Mortised, Heavy Duty Automatic Door Bottom.

Starting price $82.59 per item
Zero #323, Automatic Door Bottom, Mortised and Handed with Neoprene Seal, .375" Drop
Zero #323, Automatic Door Bottom, Mortised and Handed with Neoprene Seal, .375" Drop
SKU: Z323AA|18

This Zero International #323, automatic door bottom has a strong, durable aluminum casing that has a handed and mortised application. Fitted with a high quality, extruded neoprene seal insert, this door bottom effectively prevents the infiltration of light, sound, drafts, dirt, and smoke. This product is fire and smoke rated and is available in aluminum mill finish. Custom cut to size.

To determine length needed, see How to Measure for an Automatic Door Bottom. Not sure what handing is required for your door? See How to Determine Handing / Swing of Door.

Starting price $45.88 per item
NGP 320 Automatic Door Bottom, Mortised for Metal Door with  Silicone Seal, .5" Drop
NGP 320 Automatic Door Bottom, Mortised for Metal Door with Silicone Seal, .5" Drop
SKU: N320S|24

NGP 320 automatic door bottom is designed for the interior of hollow metal doors. It is built with a heavy duty mechanism that will ensure smooth operation. It is fitted with a set of two silicone seals. Available in Mill Finish Aluminum and length is custom cut to size.

Starting price $54.00 per item
NGP 320 Automatic Door Bottom, Mortised for Metal Door with NGP-TPV Seal, .5" Drop
NGP 320 Automatic Door Bottom, Mortised for Metal Door with NGP-TPV Seal, .5" Drop
SKU: N320N|24

NGP 320 automatic door bottom is designed for the interior of hollow metal doors. It is built with a heavy duty mechanism that will ensure smooth operation. It is fitted with a set of two NGP-TPV seals. Available in Mill Finish Aluminum and length is custom cut to size.

Starting price $48.50 per item
NGP 320 Automatic Door Bottom, Mortised for Metal Door with Vinyl Seal, .5" Drop
NGP 320 Automatic Door Bottom, Mortised for Metal Door with Vinyl Seal, .5" Drop
SKU: N320V|24

NGP 320 automatic door bottom is designed for the interior of hollow metal doors. It is built with a heavy duty mechanism that will ensure smooth operation. It is fitted with a set of two vinyl seals. Available in Mill Finish Aluminum and length is custom cut to size.

Starting price $48.00 per item
NGP 4447 Dual Actuated Automatic Door Bottom, Mortised Aluminum Casing with Nylon Brush Seal, .5" Drop
NGP 4447 Dual Actuated Automatic Door Bottom, Mortised Aluminum Casing with Nylon Brush Seal, .5" Drop
SKU: N4447WH|36

NGP 4447 Fully Mortised, Dual Actuated Automatic Door Bottom has a .5" drop down nylon brush seal, which is actuated by the frame stop on both ends. It creates a tight seal at the bottom of doors to prevent infiltration of sound, light, drafts and more. Available in mill finish aluminum and length is custom cut to size.

Starting price $106.00 per item