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Old 04-04-2011, 09:13 AM   #1
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NEWBIE QUESTION ALERT!! Jamb Extensions


Can you explain jamb extensions?! Yes I know they extend the jamb! But I guess the question is when would you use them?! My ASSUMPTION is that they are used to bring the jamb out even with the drywall so that the trim sits flush?! Correct? But wouldn't that show a seam on the inside of the window? These would also be used (if my assumption is correct) on doors?

I know

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Old 04-04-2011, 09:39 AM   #2
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NEWBIE QUESTION ALERT!! Jamb Extensions


Your right Scot.
The extension jamb is used to bring the window or door frame flush to the wall covering.

Extension jambs are offset a 1/4 - 3/16" to the window frame and to the casing. Never Ever Flush!!!!


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Old 04-04-2011, 10:12 AM   #3
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NEWBIE QUESTION ALERT!! Jamb Extensions


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Originally Posted by tcleve4911 View Post
Your right Scot.
The extension jamb is used to bring the window or door frame flush to the wall covering.

Extension jambs are offset a 1/4 - 3/16" to the window frame and to the casing. Never Ever Flush!!!!

Can you elaborate a little on the reason for this?
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Old 04-04-2011, 10:28 AM   #4
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NEWBIE QUESTION ALERT!! Jamb Extensions


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Originally Posted by tcleve4911 View Post
Your right Scot.
The extension jamb is used to bring the window or door frame flush to the wall covering.

Extension jambs are offset a 1/4 - 3/16" to the window frame and to the casing. Never Ever Flush!!!!

Offset meaning to NOT have a seam?
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Old 04-04-2011, 10:29 AM   #5
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NEWBIE QUESTION ALERT!! Jamb Extensions


The offset merely gets you away from trying to create a flush condition that will ALWAYS have a visible seam in it.

Lots of trim and molding details will be always be offset.

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Old 04-04-2011, 10:40 AM   #6
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NEWBIE QUESTION ALERT!! Jamb Extensions


I've seen window extensions w/o a reveal, and I have to agree with tcleve that a reveal "should" be standard practice. It add's a nice dimension to the window w/o having to use some form of attachment every 6" or so.
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Old 04-04-2011, 10:53 AM   #7
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NEWBIE QUESTION ALERT!! Jamb Extensions


Does a picture help?
Attached Thumbnails
NEWBIE QUESTION ALERT!! Jamb Extensions-extension-reveal.jpg  
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Old 04-04-2011, 10:55 AM   #8
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NEWBIE QUESTION ALERT!! Jamb Extensions


I need to get back into SU

I was frustrated but I think I'll work on the 'component' aspect....
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Old 04-04-2011, 11:11 AM   #9
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NEWBIE QUESTION ALERT!! Jamb Extensions


Well, if you'll notice, they aren't very accurate windows. I'm more of a 'quick sketch' guy... just like to get the ideas across.
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Old 04-04-2011, 11:24 AM   #10
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Does a picture help?
The semi green is the jamb extension offset? Yes if I am correct that does help! Thanks
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Old 04-04-2011, 11:31 AM   #11
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NEWBIE QUESTION ALERT!! Jamb Extensions


Our monitors might show colors differently. The glass is blue, the window rail and frame are dark brown, the extension is corkboard colored, and the casing is flakeboard colored.
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Old 04-04-2011, 11:33 AM   #12
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Our monitors might show colors differently. The glass is blue, the window rail and frame are dark brown, the extension is corkboard colored, and the casing is flakeboard colored.
I am referring to the corkboard color then?!
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Old 04-04-2011, 11:36 AM   #13
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NEWBIE QUESTION ALERT!! Jamb Extensions


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I am referring to the corkboard color then?!
Right.

The original intent of adding a revealed offset was, of course, to keep the seam from being so danged difficult to keep tight, but also to alleviate the problem of the trim boards tending to warp forward and back. With a reveal, the slight movement isn't noticable, and there is also a corner crease into which to bed caulk.

FYI --- The term Moulding comes from the fact that long before we began using decoratively carved wood this way, the edges of doors and windows were actually 'moulded' with plaster. Years later, wood strips were cut to simulate this plaster edging.
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Old 04-04-2011, 11:36 AM   #14
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So you could actually build a box and insert to cover the entire inside (leaving no seam) OR run off of what you have and cut pieces to bring it out and offset:?
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Old 04-04-2011, 11:37 AM   #15
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NEWBIE QUESTION ALERT!! Jamb Extensions


Willie.......you edited your pic and made it more confusing.

To Evil and me anyway.......

Do you get it Evil ?

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