Jamb Extensions

Overview

Full Jambs vs Extensions

Across our different product lines we offer many jamb sizes. Some of these sizes are achieved using a single jamb component (full jamb), some of these sizes are achieved by adding a wood extension to the jamb. Further, some of these extensions are available in different thicknesses to provide various jamb reveals.

Jamb sizes we offer include:

4″ (102mm)
4-9/16″ (116mm)
4-11/16″ (119mm)
5-9/16″ (141mm)
6-1/16″ (154mm)
6-9/16″ (166mm)
6-11/16″ (170mm)
7-1/16″ (179mm)
7-9/16″ (192mm)
8-17/32″ (217mm)
9-9/16″ (243mm)
10-9/16″ (268mm)

Below, we’ve used select sizes to summarize some of our variability.

Full Jamb vs Jamb Extension

Full Jamb

A pushout casement with a 4-9/16" jamb.

Jamb Extension

A rotogear casement with a 6-9/16" jamb (achieved using a 5/8" extension).

4 Inch Jambs

4" Jambs

Our standard 4-9/16″ jamb can be cut down to achieve a shallower 4″ jamb, this is often used in drywall-return installations.
The location of the nailing flange on our Contemporary frame automatically creates a 4″ jamb, it’s important to note that an extension is used to achieve a 4-9/16″ jamb in this case.

4-9/16 Inch Jambs

6-9/16 Inch Jambs

6-9/16" Jambs

The larger of our two main jamb sizes, 6-9/16″ (166mm) jambs are available as full jambs on our Terrace Doors.
Our windows will use one of our extensions to achieve a 6-9/16″ jamb size.

8 Inch Jambs

8" Jambs