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Semi Mortised

Semi-Mortised Automatic Door Bottoms are installed into a rabbet in the door, with the casing flush with the door face. It has the advantage of a clean and unobtrusive look, however the door generally needs to be removed upon installation. They are best suited for hard flooring however they 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. As with all our products, these are made of heavy duty material that is guaranteed to last through many usages.

Select a product to get started. You can use the filter on the left hand side to narrow down your search. Don’t see what you need? Call us at 845-338-1300. 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

Pemko #4131 Automatic Door Bottom, Aluminum with Choice of Seals, Narrow Casing
Bestseller
Pemko #4131 Automatic Door Bottom, Aluminum with Choice of Seals, Narrow Casing
SKU: P4131CPKL|36

This regular duty Automatic Door Bottom lowers a rubber seal when the door is closed to prevent infiltration of light, sound and drafts. The high quality mechanism of the door bottom ensures smooth action when the seal is lowered and fills gaps up to 3/4". Choice of rubber insert, finishes and mounting type. Length is custom cut to size.

PRICED PER RANGE

To determine sizing, see How to Measure for Automatic Door Bottom.

Starting price $50.15 per item
save 15%
Pemko #4301 Automatic Door Bottom, Aluminum Casing with Rubber Seals, .75" Drop
Bestseller
Pemko #4301 Automatic Door Bottom, Aluminum Casing with Rubber Seals, .75" Drop
SKU: P4301CPKL|36

This heavy duty automatic door bottom has a drop-down seal which is lowered when the door is closed to prevent air, light, sound, fire, smoke, dust and moisture from infiltrating the gap under doors. Designed to be surface mounted or semi-mortised applied to the face of the door. Available in a choice of two anodized finishes and choice of PemkoPrene™ or EPDM rubber seal.

PRICED PER RANGE

How to Order: Selecting Finish, Seal Material and Exact Size will calculate your total price.

Starting price $82.45 per item
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Zero #362, Automatic Door Bottom, Heavy Duty Semi-Mortised, Sponge Neoprene Seal, 1" Drop
Zero #362, Automatic Door Bottom, Heavy Duty Semi-Mortised, Sponge Neoprene Seal, 1" Drop
SKU: Z362AA|36

This Zero International #362, Semi Mortised, Heavy Duty, Sound Rated Automatic Door Bottom provides the best sound seal possible for normal sound levels and will prevent infiltration of light, drafts and more. Fitted with a high quality closed-cell sponge neoprene seal and high quality mechanism that has been successfully tested through 5 million cycles. Rated for fire, smoke and sound. Available in three anodized finishes and is custom cut to size.

Starting price $93.46 per item
Zero #366, Automatic Door Bottom, Heavy Duty Semi-Mortised, Neoprene Seal, 1" Drop
Zero #366, Automatic Door Bottom, Heavy Duty Semi-Mortised, Neoprene Seal, 1" Drop
SKU: Z366AA|36

This Zero International #366, semi-mortised, heavy duty automatic door bottom creates a reliable seal at the bottom of doors and prevents infiltration of sound, smoke and fire. It is fitted with a solid neoprene bulb seal and high quality mechanism which has been successfully tested through 5 million cycles. Rated for fire and smoke rated.. Available in three anodized finishes, and length is custom cut to size.

Starting price $97.16 per item
Zero #368, Automatic Door Bottom, Heavy Duty Semi-Mortised, Double Neoprene, .562" Drop
Zero #368, Automatic Door Bottom, Heavy Duty Semi-Mortised, Double Neoprene, .562" Drop
SKU: Z368AA|36

This Zero International #368, Semi-Mortised, Heavy Duty, High Sound Automatic Door Bottom with a double solid neoprene seal offers the best sound control for high sound levels and will prevent infiltration of light, drafts and more. Made with high-quality mechanism that has been tested to 5 million opening and closings. Sound, Smoke and Fire-Rated and is available in three anodized finishes. Length is custom cut to size. View more details in description tab below.  

Starting price $122.14 per item
NGP 520 Automatic Door Bottom, Surface or Semi-Mortised, Heavy Duty, Aluminum Casing with Neoprene Bulb Seal, .875" Drop
NGP 520 Automatic Door Bottom, Surface or Semi-Mortised, Heavy Duty, Aluminum Casing with Neoprene Bulb Seal, .875" Drop
SKU: N520NHMA|24

NGP 520 surface mounted or semi-mortised, heavy duty automatic door bottom creates a reliable seal at the bottom of doors and prevents infiltration of sound, smoke and fire. It is fitted with a solid neoprene bulb seal. Available in three anodized finishes, and length is custom cut to size.

Starting price $99.50 per item
NGP 680 Automatic Door Bottom, Surface or Semi-Mortised, Heavy Duty, Aluminum Casing with Double Brush Seal, .875" Drop
NGP 680 Automatic Door Bottom, Surface or Semi-Mortised, Heavy Duty, Aluminum Casing with Double Brush Seal, .875" Drop
SKU: N680HMA|24

NGP 680 surface mounted or semi-mortised, heavy duty automatic door bottom creates a reliable seal at the bottom of doors and prevents infiltration of sound, smoke and fire. It is fitted with a double brush seal. Available in three anodized finishes, and length is custom cut to size.

Starting price $104.00 per item
Zero #352, Automatic Door Bottom, Semi-Mortised with Neoprene Seal, .75" Drop
Zero #352, Automatic Door Bottom, Semi-Mortised with Neoprene Seal, .75" Drop
SKU: Z352AA|36

This Zero International #352, regular duty, semi-mortised automatic door bottom creates a tight seal at the bottom of doors to prevnt infiltration of sound, light, drafts and more. Equipped with a high quality, long-lasting neoprene seal and mechanism that has been successfully tested through 5 million cycles! This model is fire rated. Available in two anodized finishes and length is custom cut to size.

Starting price $67.00 per item
Pemko #4131NB Automatic Door Bottom, Aluminum with Nylon Brush Seal, Narrow Casing, .75" Drop
Pemko #4131NB Automatic Door Bottom, Aluminum with Nylon Brush Seal, Narrow Casing, .75" Drop
SKU: P4131GNBL|36

This regular duty automatic door bottom lowers a nylon brush seal when the door is closed to prevent infiltration of light, drafts, dust and insects. The high quality mechanims requires low closing force and has a smooth action. Seal drops to fill gaps up to .75". Available in five anodized finishes and length is custom cut to size.

PRICED PER RANGE

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

Starting price $62.40 per item
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Pemko #430 Automatic Door Bottom, Handed, Aluminum with Choice of Seals, .75" Drop
Pemko #430 Automatic Door Bottom, Handed, Aluminum with Choice of Seals, .75" Drop
SKU: P430DMRL|36

Heavy duty automatic door bottoms have a drop-down seal which is lowered when the door is closed to prevent air, light, sound, fire, smoke, dust and moisture from infiltrating the gap under doors. It can be surface mounted to the door or semi-mortised into the bottom of the door. Available with a PemkoPrene™ or Sponge EPDM seal, in two finishes and length is custom cut to size.

PRICED PER RANGE

To determine length needed, see How to Measure for an Automatic Door BottomNot sure what handing is required for your door? See How to Determine Handing / Swing of Door.

Starting price $98.60 per item
save 15%
Pemko #PDB4131 Automatic Door Bottom, PDB Series Aluminum Casing with Acoustic EPDM Seal, .75" Drop
Pemko #PDB4131 Automatic Door Bottom, PDB Series Aluminum Casing with Acoustic EPDM Seal, .75" Drop
SKU: PPDB4131CE|36

This automatic door bottom has been acoustically rated for its optimal sound attenuation properties. It has an EPDM drop-down seal which is lowered when the door is closed to prevent sound, air, light, fire, smoke, dust and moisture from infiltrating the gap under doors. Designed to be surface mounted or semi-mortised applied to the face of the door. Available in two aluminum anodized finishes and is custom cut to size.

PRICED PER RANGE

To determine size needed see How to Measure for an Automatic Door Bottom.

Starting price $79.90 per item
save 15%
Pemko #4301NB Automatic Door Bottom, Aluminum with Double Brush Seal, .75" Drop
Pemko #4301NB Automatic Door Bottom, Aluminum with Double Brush Seal, .75" Drop
SKU: P4301CNBL|36

This heavy duty automatic door bottom has a drop-down seal which is lowered when the door is closed to prevent light, sound, fire, smoke, dust, and insects from seeping through the gap under doors. Designed to be surface mounted or semi-mortised applied to the face of the door. Available in two aluminum anodized finishes and length is custom cut to size.

PRICED PER RANGE

To determine size needed, see How to Measure for an Automatic Door Bottom. Note, door bottom can be trimmed up to 2".

Starting price $77.60 per item
save 20%