When I order a window with 6 9/16″ jambs, exactly what is 6 9/16″? I’m pretty sure that it’s the distance from inside of the nailing flange to the edge of the jamb on the inside of the window.
Right?
When I order a window with 6 9/16″ jambs, exactly what is 6 9/16″? I’m pretty sure that it’s the distance from inside of the nailing flange to the edge of the jamb on the inside of the window.
Right?
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Replies
That's right....but I would never order a window like that with the extension jambs attached. Usually, something in the wall goofs up the thickness and the jambs come out too short.
I would order the next size wider (usually 7 1/4") and scribe them to fit the wall. This is especially true when you are remodeling an older home.
This is new construction and the walls are actually 8 1/2" thick total (2x6 studs with 2" of polyiso board on the outside). My thinking is to have the carpenter add 2" extension jambs to the 6 9/16" factory jambs will a little bit of reveal.
If I used your approach (a good approach for a really clean look, and also less labor), I would get 9 1/4" jambs, right? I'd have to see what Marvin would want to charge me for that.
on edit: what is this "scribing" of the jambs to reduce their width? How do you do that?
Edited 6/9/2009 8:04 pm ET by gb62
Why extend the extension? You could just get the smallest size, 4 9/16 I'm guessing, pay less money, and then add one correctly sized extension in the field. Unless you like the other look.John
I'm not extending extension jambs. I would only extend the factory jambs. If I get the factory jambs wide enough, I won't need to extend them at all.
All Marvin does is attach clear pine extensions to their standard jambs. It's not really a different jamb.
Interesting - thanks for that Marvin info. I've settled on 4 9/16" jambs (order placed today) - the carpenter will add to it, perhaps using a method similar to BoJangles' (I've seen it done that way).
Personally, I don't ever get extension jambs attached to a window. I order or make the appropriate slightly oversized jambs and attach them myself because it's easier to fit them to the walls.
You can just take the individual pieces and set them in place on the window and trace the wall profile on to the jambs with a small straightedge and then cut and plane the jambs to fit the wall perfectly. I always assemble them together and then attach the whole box to the window.
In your case, you could easily make up a one piece jamb or do it in two steps if you don't like the looks of a continuous jamb that wide. You have a lot of choices for jamb material if you are going to paint them.
On a one piece jamb of that width, I usually assemble it and then glue it to the window. Just screw some cross pieces or plywood blocks into the framing at the edge of the window to hold the jambs in place until the glue dries.
What BoJangles says.
Mike Hennessy
Pittsburgh, PA
Everything fits, until you put glue on it.