Jamb Extensions

ADDITIONAL RESOURCES

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Looking for Loewen standard sizes? Our Product Configurator allows you to browse our standard sizes and make configurations.

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" Cutdown Jambs

4" Jambs w/ Contemporary Cladding

4-9/16 Inch Jambs

4-9/16" Full Jamb

Our 4-9/16″ (116mm) jamb is the smaller of our two main jamb sizes.
Full jambs in this size are available across our entire product portfolio.

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.