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On-Guard White Cap Jamb

On-Guard White Cap jambs, or frames, are a composite material, wrapped in a white vinyl that is prefinished and requires no finish on site. It can be finished onsite with a good exterior paint. It is a great jamb for houses that are close to the shore or get excessive water infiltration. The frame itself is rot proof and works great with a Therma-Tru door unit.

Reeb Finish

This jamb species cannot be finished by Reeb Finish.


On-Guard White Cap jambs can be used with single doors, double doors, doors with one sidelite and doors with two sidelites. Units with Mullposts can have Framesaver Primed Mullposts.


The On-Guard White Cap jamb is available in 4-9/16″, 6-9/16″, and 7-9/16” jamb depths. This jamb cannot be customized to other jamb depths. Transom sills are also available in standard 4-9/16” and 6-9/16” sizes, with reinforced transom depth options of 4-9/16″, 6-9/16″, or 7-9/16″.


All standard heights are available for this type of frame, along with some material available in 10’ pieces to accommodate larger width or taller units. The 10’ pieces are newer inventory and may not be ordered at this time.

Exterior Casing

Brickmould is available as an exterior trim in a matching straight grain material and will be 2” in width.

Updated on April 9, 2020

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