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Old 10-23-2013, 11:37 AM   #1
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Therma-Tru Door Installation Questions


I have a new pre-hung door that will be installed by a contractor (I'll assist) on a 35 year old house. I like to understand what needs to be done before starting. After reading the Therma-Tru install steps, I have a few basic questions:

The steps state:

- Are the framing and walls plumb?
- Is the opening square?
- Are the framing walls around the opening in the same plane?
- Is the subfloor level and solid?

And in each case, if not, then "Fix any problem now".

But given this is not new construction, I don't see how any of these problems can be fixed prior to just installing the door and shimming it as needed to assure it is plumb, square, in the same plane as the walls, and level on the subfloor (even if the subfloor is not).

So is there any way to address these possible issues, prior to placing the door and jamb in the rough opening and shimming as needed?

thanks,
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Old 10-23-2013, 12:59 PM   #2
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Therma-Tru Door Installation Questions


Sure is.
Nails in the top or bottom of the studs can be cut and the stud adjusted so it's plumb.
Floors can be jacked or leveling compound used under where the threshold sits.
Should not matter if the header is off as long as the door fits.
The rest is just a matter of shimming.

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Old 10-23-2013, 01:52 PM   #3
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Therma-Tru Door Installation Questions


Solid advice from Joe, although moving the studs can be easier said than done when the drywall/plaster is screwed into them already. For the most part jdbs, getting the door plumb and level is done through shimming as you figured (and as Joe also said).
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Old 10-25-2013, 10:33 AM   #4
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Therma-Tru Door Installation Questions


jdbs3,

Feel free to contact us with any questions you have. You can reach customer support 8:00 a.m. to 6:00 p.m. EST Monday through Friday at 1-800-843-7628 (1-800-THERMATRU) or reach us by email by going to this link: http://www.thermatru.com/customer-su...t-us/form.aspx

Thank you, Therma-Tru Doors.
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Old 10-25-2013, 10:55 AM   #5
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Therma-Tru Door Installation Questions


I prefer to take the door out of the jamb before installing. Square the jamb and level it. You should be ok. You check for square by taking a diagonal measurement from outside of the jamb. If they don't match. The door needs to be lifted with a shim a little. (on this side only).
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Old 10-25-2013, 12:14 PM   #6
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Therma-Tru Door Installation Questions


Quote:
Originally Posted by 747 View Post
I prefer to take the door out of the jamb before installing. Square the jamb and level it. You should be ok. You check for square by taking a diagonal measurement from outside of the jamb. If they don't match. The door needs to be lifted with a shim a little. (on this side only).
No offense 747, but that can be very tricky. I don't believe that I've ever met a professional that does that (except in some extraordinary circumstance), I would not advise it.
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Old 10-29-2013, 03:02 PM   #7
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Therma-Tru Door Installation Questions


Quote:
Nails in the top or bottom of the studs can be cut and the stud adjusted so it's plumb.
Floors can be jacked or leveling compound used under where the threshold sits.
Should not matter if the header is off as long as the door fits.
The rest is just a matter of shimming.
and

Quote:
although moving the studs can be easier said than done when the drywall/plaster is screwed into them already.
My existing threshold is bowed in the middle, so it will be replaced. Easy enough to assure this is level. As noted, the header is a non-issue.

But if the studs are not plumb, then just cutting the nails still may not allow for adjusting the jacks/kings. From my perspective, it may come down to "it is what it is" and compensate for it when shimming the jamb.

Thanks for the feedback all.

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