Dunbarton offers accessories to complete any project including weatherstripping, casing, and thresholds.


Dunbarton S56 Casingsmall

Dunbarton frames and casing are designed to work together to offer the best commercial, industrial, and multi-family package. We offer casing in steel, aluminum, and S56 Colonial. However, you also have the option to use any wood trim you prefer. Additionally, all trims are available in our standard colors or custom color-matched to meet your job specifications!

Dunbarton provides casing for our frames in three styles:

Steel Casing: 1-1/2" width

Our steel casing is 1-1/2″ is standard on all RediFrame products except Kerf RediFlex.

Aluminum Casing: 1-1/2" width

The aluminum casing is an extruded casing designed with modern, sculpted lines in durable prefinished aluminum. 

S56 True Colonial Casing: 2-1/4" width

S56 Colonial casing is a true 2-1/4″ width casing that brings a traditional design to any project. 

Dunbarton Casing Pro Tip

Casing Styles

Casing Installation

Our casing is easy to install but every so often it is necessary to uninstall and adjust. We recommend our Casing Tool available to order here. Please follow the instructions as indicated on the video!

Casing Installation Attachments

Casing Corner Clip

Dunbarton’s Casing Corner Clips are designed to hide surface distortion and gaps. They are also designed to allow the casing to be removable in case of any changes. When installing casing on RediFrame and RediFlex frames, the supplied clips are designed to snap in place into both ends of the header casing. After installed, the clips help ensure the proper alignment of the miter between the header casing and jamb casing on our steel, aluminum, and S56 Colonial casing.

Note: The RediFrame system does not require crimping to hold the clip in place.  The combination of the casing, frame lance, and clip design also makes sure the casing does not rattle during the operation of the door. 

Casing Retainer Clip

Casing Retainer Clips allow you to install Dunbarton casing on our frames ordered without lancing. Download instructions for complete details. 


Threshold Dunbarton

The purpose of a threshold is to close the gap between the bottom of a door and the floor. Thresholds are used with door bottoms and weatherstripping to seal the opening, preventing air, rain, and snow from entering.  Dunbarton has four standard styles with two extenders for the fixed inswing, with other options available.

Product Specifications:

FASTENERS: #10 x 1-1/2” flat head Phillips screws, provided. Other screw types and anchors are available upon request.
MATERIAL: 6063-T6 Aluminum
WIDTH: See profile Tech Sheet for details

Dunbarton provides notching for thresholds in two variations:

Kerf RediFlex: Threshold Notching

  • Over 23 threshold prep notches on the actual thresholds.

RediFlex Frame: Notching for Sill - Standard Guides Below

A complete guide for each style below in yellow.

  • Notch for 5 or 6 degrees
  • ADA notch flat 1/2″
  • 7/8″ marble notch

RediFrame: Field Notching for Sill - Click Guide Below

  • RediFrame is not available pre-notched but the chart for on-site notching is available by download here.
Dunbarton Threshold Pro TipUpdated

RediFlex Sills & Notching guide

Click each photo to see a larger view of the threshold and to view and/or download complete information.


Weatherstrip Dunbarton copy

Kerf Weatherstripping

Dunbarton’s 90-minute fire-rated weatherstripping is available in three colors: white, brown, and beige. The easy-to-install kerf weatherstripping comes ready to install on-site or is available pre-installed. Be sure to specify weatherstripping when ordering kerf frames.

Click the button below to visit our Fire Testing page to see complete fire-rating information.

Kerf Weatherstrip Sizes Available

Weatherstrip Colors