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Discussion Starter · #1 ·
Considering using Integrity by Marvin, all-Ultrex, for new construction. Thinking of milling jamb extension stock with kerf feature. See pic, attached.

Jamb extensions are almost always more expensive when you buy them with the windows. With the right knives, stock can be custom molded with the appropriate edge and kerf.

A spline can be bought with the windows that can enable a nice fit with these pultruded fiberglass windows and their extenders.

Anybody used something like this?


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