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Door jamb size for 2x4 walls and 5/8 rock

10286 Views 8 Replies 7 Participants Last post by  Missouri Bound
I'm ordering prehung doors.

6 door rough openings are framed with 2x4 with 5/8 sheetrock on each side. That's 4 3/4". My door vendor said the standard jamb size for that is 4 7/8". He says the side of the jamb that faces the sheetrock and studs is beveled to 4 3/4".

Does that sound right? Will the jamb prevent my door moulding from sitting square on the wall and the door?

Or is splitting the extra 1/8" across 2 sides of the door = 1/16" not a big deal?

Thanks
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Order split in jamb doors.

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They suggested the right doors.
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My door vendor said the standard jamb size for that is 4 7/8". He says the side of the jamb that faces the sheetrock and studs is beveled to 4 3/4".

Does that sound right?
My question is, why 5/8 on the walls?

I've never heard of beveled studs to accommodate Sheetrock around doors, windows, etc.
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rjniles; said:
Order split in jamb doors.

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Didn't even know these existed. That's pretty cool. No mitering and gluing up the moulding.
kwikfishron; said:
My question is, why 5/8 on the walls?

I've never heard of beveled studs to accommodate Sheetrock around doors, windows, etc.
It seems that everyone uses 5/8 in NYC. I think it's firecode. This is an attached 3-family dwelling. But I'm not sure.

Whenever I'm in home depot by me, guys are always buying 5/8".

When I go to Long Island (NY suburb) to visit my folks, 1/2" seems to be more common. I've done some repairs to my parents home and have encountered 1/2" rock.
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In commercial construction, 3 5/8" metal studs are generally used with 5/8" drywall. I spec door jambs at 5".
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My question is, why 5/8 on the walls?

I've never heard of beveled studs to accommodate Sheetrock around doors, windows, etc.
Not beveled studs, sounds like beveled door casing....which I’ve never heard of either.

5/8 fire code is normally required for attached garage wall around here....as well as in combination with other fire prevention measures for duplexes. Ron
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If you have ever done remodeling on older construction you would know that 1/8" is nothing to worry about.
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