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Pre-hung door vertical sag

3.9K views 25 replies 9 participants last post by  TimNJ  
#1 ·
We’re trying to run some wire into some prehung exterior French doors. The main door is sagging vertically and scraping the metal casing at bottom. Thought about knuckle bedding, but angles look ok, it’s just that they either mounted this one too low by 1/4” or the support jamb has sunken on this side.

These are aluminum clad wood doors (even on bottom)

What would you do? Reseating the hinges that amount would not be fun.

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#6 ·
What does your reveal show down the center astragal where the two doors meet?
If it is the doors sagging the top will be tight and the bottom open too wide.
If the line is good and the doors are hanging up on the threshold in the middle then you are going to have to pull the fasteners out of the jambs and shim under each one to lift both side jambs up.

Get down eye level to the threshold and see if it is bowed up in the middle.
 
#7 ·
Awesome

Great advice. Thanks for the comments.

Here’s what I’ve found.
The threshold is buckled up a bit. It was laid on a concrete base that looks like it cracked and split the glue joint.

The reveal down the center is clean and even, as is the jamb side. However, as you can see from the photos, they hung the door just slightly lower than the other. This, combined with the threshold buckling, is causing the catch at the bottom.

Since the amount it needs to be adjusted vertically is so small, would it make sense to replace the hinges with heavy duty adjustable and just key them up a bit?
 

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#10 ·
Since the amount it needs to be adjusted vertically is so small, would it make sense to replace the hinges with heavy duty adjustable and just key them up a bit?
Are all the hinges screws tight?

Actually makes more sense to suck the top hinge in with a screw as Griz suggested and shim the bottom hinge out, if needed. Shimming can be done with file folder, back of a note pad etc cardboard. I'm old school and use cigarette hard packs or carton boxes.

Top hinge doesn't suck in it can be chiseled or routed out.

All of that can be done pretty much before a google search, trip to amazon, and ordered placed for new hinges.

Threshold, looks like the jamb spread (pulled away from full sill) and that gap opened on the right. May be why the door is skewed in the opening. Typically with those there is adjustment in that piece or on the door sweep.

Most often door sag is an accumulation of factors. You don't get them all addressed replacing hinges becomes a temporary fix.
 
#8 ·
Got a wider shot of the door?

Can't tell what I am looking at on the threshold shot. Is that the astragal on the metal threshold?

Top shot looks like left door has a wider gap at the center and driving a shim under that door's hinge jamb would close that gap up and lift the corner off the threshold.
 
#11 ·
Outswing.

Here is a wider shot. There is a slightly larger space at the astragal for the door with issue.

The second shot shows the bottom gap between threshold and door. Note that the hinge side of door is higher than the astragal side.

It may be that the threshold support has deteriorated under weight. The hinge jamb (photo3)looks like it is buckling the threshold on this side. That won’t be fun!

https://photos.app.goo.gl/Nq5yPSMM5v5nYnUh7
 
#13 · (Edited)
I've never seen an astragal hang down so far below the door slab.

Sidelites aren't going to let you pull the hinges anywhere.

Going to have to pull the top casings to free the head jamb. Make sure there is no shim to keep it from moving up.
I have a big thick honkin' common screw driver I use for these. If the head jamb is free and clean between it and the header and you drive that hinge jamb up, you will see your clearance open up on the threshold.
 
#14 ·
Well, this one got really interesting. After we could not move the jamb up and could not reattach the sill with adhesive or screws, we cut it out and found that the original builder had just put the frame down on part slab/part facing with no sill pan. With settling, the sill bowed and the jamb dropped into the space.

We’re throwing this one back. The original contractor and owners will have to fight it out.
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#18 ·
Settling?
That's not settling.
That's the kick in front of the door being driven up under the sill. The kick should be even with the slab that the main part of the sill is on.
Or, the whole door should have been raised the equivalent of what the kick is above the slab.

See this all the time in houses with brick kicks. Instead of the mason cutting the bricks, he just jams them under the sill which results in the sill being bent up. Not a functional issue on an inswing door, but on your outswing it's obvious why the door wouldn't open.
 
#24 ·
At every point, we updated the client on what was going on and the options. When we discovered the cause, we spoke with Jen-Weld, who said that without the drip pan and given the installation, no warranty. We relayed this to the client and asked if they wanted us to order replacement parts and proceed. They said they wanted to approach the original contractor since it was incorrectly installed in the first place.

We put in a temporary moisture/dust sill so they didn’t have a gaping hole and “threw it back to them.” We documented everything, sent it to them, and said we would be happy to come back and do the repair once they went through their process. We didn’t walk away and leave them hanging, but rather respected their decisions and supported them in the best way possible. If they get nowhere with original contractor and call, we will be back and finish.