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Old 07-24-2012, 04:16 PM   #1
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doors, rough openeing 79 1/4


Got 4 doors to install and the height of the rough opening from finished floor to the header is 79 1/4
Is this something that would be impossible to find a prehung door to fit?

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Old 07-24-2012, 04:26 PM   #2
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doors, rough openeing 79 1/4


Not gonna find a door off the shelf that fits that. You can either cut the bottom of the ddor/jamb, or order doors that are cut already to fit that.

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Old 07-24-2012, 07:29 PM   #3
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doors, rough openeing 79 1/4


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Got 4 doors to install and the height of the rough opening from finished floor to the header is 79 1/4
Is this something that would be impossible to find a prehung door to fit?
Is that 79 1/4" from bare floor to bare stud? How old is this house? Are there a couple layers of floor?
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Old 07-24-2012, 08:37 PM   #4
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doors, rough openeing 79 1/4


From finished wood floor to bare stud. House is 60 years old. Just subfloor and pine flooring.
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Is that 79 1/4" from bare floor to bare stud? How old is this house? Are there a couple layers of floor?
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Old 07-24-2012, 08:48 PM   #5
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doors, rough openeing 79 1/4


Just trim the jambs and door to fit the opening---Be sure you get a quality door---the cheap hollow core one only have 1 " of wood in the bottom before you end up cutting into the hollow part.

A house of any age is seldom level---so check the doorway opening before cutting the jambs---one leg may need to be longer than the other--
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Old 07-24-2012, 09:29 PM   #6
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doors, rough openeing 79 1/4


Local lumbar yard is offering to cut them for me.....think its doable for a diyer?
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Just trim the jambs and door to fit the opening---Be sure you get a quality door---the cheap hollow core one only have 1 " of wood in the bottom before you end up cutting into the hollow part.

A house of any age is seldom level---so check the doorway opening before cutting the jambs---one leg may need to be longer than the other--
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Old 07-24-2012, 09:38 PM   #7
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doors, rough openeing 79 1/4


If they will cut them--good--then all you will need to do is shorten one jamb leg yourself if the floor is out of level.

As to doing it your self?

Maybe---I don't know your skills or tools---but members here do it frequently--
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Old 07-24-2012, 09:38 PM   #8
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doors, rough openeing 79 1/4


lumber yard sounds a lot easier but like mentioned check floor to see if jam legs will be the same since sitting on finished floor and leave jam at least 3/4 longer than bottom of door i.m.o.

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Old 07-24-2012, 09:49 PM   #9
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doors, rough openeing 79 1/4


lots of places stock 78" prehung doors and if they dont they can order them in pretty quickly. i know here locally home depot stocks 78" masonite doors. and at the local building supply store here can order in moulding & millwork doors in 4-5 days which are alot better quality then what HD has.
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Old 07-24-2012, 10:00 PM   #10
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doors, rough openeing 79 1/4


78" is what Im looking at. They are telling me that the 78" door needs a 80-1/2" Rough Opening. That sound correct?
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lots of places stock 78" prehung doors and if they dont they can order them in pretty quickly. i know here locally home depot stocks 78" masonite doors. and at the local building supply store here can order in moulding & millwork doors in 4-5 days which are alot better quality then what HD has.
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Old 07-24-2012, 10:04 PM   #11
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doors, rough openeing 79 1/4


Generally the height of your opening should be 2 to 2 1/2" more than the height of the door slab. One inch for the head and one inch for the door clearance at the floor is minimum.
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Old 07-24-2012, 10:06 PM   #12
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doors, rough openeing 79 1/4


So for a 78" door a 79 1/4 rough opening just wont cut it.
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Generally the height of your opening should be 2 to 2 1/2" more than the height of the door slab. One inch for the head and one inch for the door clearance at the floor is minimum.
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Old 07-24-2012, 10:07 PM   #13
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doors, rough openeing 79 1/4


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So for a 78" door a 79 1/4 rough opening just wont cut it.

It wont cut it unless you want to cut it (at the bottom)

Pun intended.
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Old 07-24-2012, 10:42 PM   #14
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doors, rough openeing 79 1/4


ya there is 1" from the bottom of the door to the bottom of the jamb. measure what height you need for it to fit into your rough opening. In a perfect world yes 1" at the top when you yourself frame it but it was born at 79 3/4" so your going to have to make it work. if you can leave an 1/8" 1/4" or whatever. take your fitting measurement, it'll be 79 1/2" -79 3/8ish. measure from the top of your door jamb to the bottom mark and cut it with a circular saw with a square as a guide so its straight. your door jamb. now fits. it doesnt have the 1" at the top and bottom but it fits and will work. and i recommend just leaving the prehung packaged up when you cut it. its alot easier to handle. if the floor is out of level you can cut the one side say 79 1/2" and the other 79 5/8" so it sits perfectly level on the finish with no gap.
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Old 07-24-2012, 11:24 PM   #15
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doors, rough openeing 79 1/4


YOur measurement is from the finished floor? Then you only need about 3/8" at the bottom.
Is it level?

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