Automatic Door Bottom, Mortised for 1-3/8" Door, EZ Access

Automatic Door Bottom, Mortised for 1-3/8" Door, EZ Access

Trademark Soundproofing Mortised Automatic Door Bottom is designed for wooden doors with a minimum thickness of 1-3/8". Fitted with a Sponge Neoprene seal which is automatically lowered as the door closes.  Can fill gaps up to .5". Easy Access End Caps allow the door bottom to be removed without removing the door. Sized at 36" and can be cut up to 8" on the field.

Special Discounts apply to orders over $500.00! See Product Descriptions for details.

Price: $39.50
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This Automatic Door Bottom was specifically designed to soundproof thinner doors, measuring at least 1-3/8" thick.

Dimensions: Body measures .55" W x 1.10" H. Extended flanges on both sides measure .375". Total width is 1.33". Length is 36".

Cutting to Size: This can be trimmed in the field, up to 8"

Not sure what size you need? See How to Measure for an Automatic Door Bottom.

Door Type / Thickness: Model is compatible with wooden doors, with a minimum thickness of 1-3/8".

Finishes: Available in aluminum mill finish.

Seals: Sponge neoprene seal

Mounting: Door bottom fully mortised so it does not alter the appearance of the door, making it perfect for decorative doors, upscale condos, dormitories, commercial buildings and luxurious hotels. 

How it Works: This product utilizes a concealed flat spring mechanism which is activated by the pressure of closing the door (The brass nut at the head gets pushed in by the door jamb, which lowers the seal). The high quality neoprene rubber seal drops, filling gaps up to 1”, upon the closing of door to create a tight seal and raises up automatically when the door is opened to ensure smooth door operation. Our door bottoms have been tested through 5 million cycles and provide the same excellent quality as our mortised automatic door bottom. For more information, see About Automatic Door Bottoms.

Easy Access End Caps: Easy Access End Caps and Automatic Door Bottom can be removed for cleaning and maintence without removing the door. ADB can optionally be screwed into door through existing mounting screws holes.

Handing: Models is reversible, compatible with both right and left handed doors.

Installation: End plates, counter plates and screws provided.

Please note, images are for illustrative purposes only. They are not actual photos. Therefore, actual colors may vary slightly and size may be enlarged to show detail. See product specs for exact measurements.

Special Discounts on Our Door Hardware:

No Coupon Code Needed. Discount automatically applied when added to shopping cart.

Spend $500.00, get 5% off plus free shipping
Spend $1000.00, get 10% off plus free shipping

See our Monthy Specials and Discounts for more great Soundproofing Savings!

Product Data

Click to Print Product Specs.

Product Specs of TH114 Automatic Door Bottom for 1-3/8" Door

Easy Access End Cap:


Product Specs of TH114 Automatic Door Bottom for 1-3/8" DoorProduct Specs of TH114 Automatic Door Bottom for 1-3/8" Door

Installation Guide

Click here for a Printable Copy of How to Install a Mortised Automatic Door Bottom.

Automatic Door Bottoms are available with three mounting options: Surface Mounted, Semi-Mortised and Fully Mortised. A surface mounted application can be applied without removing the door from its hinges. For a semi-mortised, if the rabbet in the door is cut-out already, the door does not need to be removed. For a fully mortised application the door should be removed before starting.


Prepare your Door

Remove door and cut mortise in bottom of door as per the dimensions of the provided product specs (see Figure 1).

NOTE: If a door is fire labeled or of special construction, mortise preparation must be done by the door manufacturer.



Measure your Door

Measure your door from side to side, that is the length required for your Door Bottom (see Figure 2).

Trim Your Door Bottom

Once you have you determine the size needed, if necessary, trim your door bottom.
Use a chop saw or table saw to create a perfectly straight cut.

Note, Only trim opposite the actuating plunger, brass nut. (Trimming from the brass nut side will ruin your ADB).
You can trim from the edge up to one inch of the screw on the side wall of the ADB (see Figure 3).



Apply your Door Bottom

With door removed from opening, install the door bottom with plunger at the hinge side, fasten with screws provided and
install door in opening (see Figure 4).



Adjust your Door Bottom Screw the actuating plunger in or out as required until the gasketing just touches the
sealing surface when the door is closed (see Figure 5). It is not necessary to squash the gasket to provide an effective seal.

For additional assistance and product information, feel free to contact us. Our trained and friendly staff will guide you with all your soundproofing needs.Once you have followed through with all the instructions your Automatic Door Bottom is good to go! Enjoy years of quality sound, draft and light infiltration control with your new door bottom.

Shipping & Returns

Shipping and Return information is specific to this product page only (not for other products on our site).

  • Shipping:
    • Standard stock sizes (available above) ship within 1 business day.
    • For stock sizes ordered through our office, please allow 7-14 business days to ship.
    • FREE SHIPPING on orders over $75.00. There will be a flat $14.99 shipping and handling fee on orders under $75.00. - Applies to orders shipped within the USA (excluding Alaska and Hawaii).
    • Ships FedEx Ground.
  • Returns:
    • Product can be returned in brand new conditions up to 30 days from date of purchase.
    • Please call or email us to receive an RMA number before returning. No returns will be processed without an RMA number.
    • Return shipping is customer's responsibility. Return address to be provided along with RMA number.
    • If you are shipping via USPS (not recommended) do NOT require signature as we will not be able to pick up your package from local post office facility.
    • Click here for more information on our Return Policy.

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Customers Questions and Answers

1) Pamela D: Can this be mortised in an MDF with solid core door?

Trademark Soundproofing Reply: Yes it can.