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Old 01-26-2012, 07:01 PM   #1
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Length of screws for door hinges


Are 1/2" long flat head countersunk screws adequate for installation of interior doors onto a door frame? What is the retention force of a 1/2" countersunk wood screw in a pine wood frame. This is a new home and the general contractor provided interior door kits using 1/2" long screws.

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Old 01-26-2012, 07:10 PM   #2
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Length of screws for door hinges


1/2" ?

I'd go a little longer than that. At least 1.5 to 2"...but really, you can use as long as you want. Worst thing that can happen is you actually get into something solid

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Old 01-26-2012, 07:24 PM   #3
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Length of screws for door hinges


Usually aroud here the screws that come with doors are only 3/4" as that is how thick the door material is. For a more solid door, shim solid behind the hinge area and use 1.5-3" screws that get you into the stud. Predrill!!!
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Old 01-26-2012, 07:36 PM   #4
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Length of screws for door hinges


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Originally Posted by mae-ling View Post
For a more solid door, shim solid behind the hinge area and use 1.5-3" screws that get you into the stud. Predrill!!!
+1
You shouldn't need to do all 4 on each hinge that deep...
but at least one per hinge should be (even on interior hollow core doors).
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Old 01-26-2012, 07:38 PM   #5
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Length of screws for door hinges


I usually to the two furthest back from the edge of the stud on the top hinge (our hinges have 4 screws) The bottom hinge rarely pulls out. Also 2 longer screws into the door, predrill.
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Old 01-26-2012, 08:41 PM   #6
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Length of screws for door hinges


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Originally Posted by Fernand Martin View Post
What is the retention force of a 1/2" countersunk wood screw in a pine wood frame.
The top screws need to resist pullout but the bottom screws are being pushed into the jamb so they can be much weaker.
http://www.screw-products.com/specs.htm
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Old 01-26-2012, 09:24 PM   #7
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Length of screws for door hinges


As others said.. using one longer screw per hinge will add some strength. I used one 3" screw per hinge and you can notice a difference.
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Old 01-26-2012, 09:52 PM   #8
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Length of screws for door hinges


A pre-hung door will have hinge screws that engage, but don't stick through, the jamb. Ya gotta be able to slide it into the RO. After it's in, change a few out for screws long enough to bite into the studs. If the casing's already on, there's no telling if there're shims near the hinge, so don't pull too tight.

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