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Old 07-16-2012, 08:45 PM   #1
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bowed ceiling joists :(


i just put 1/2" drywall over P&L in one bedroom. i then noticed that the ceiling was sagging down , 2" in the middle . i thought it was the added weight of the drywall(i am sure it didn't help matters). so i checked the rest of the house = same thing.

now, i am wondering what my options are. i know there are many, some better than others, and more expensive. the BEST option, is to have the roof and ceilings completely replaced. but i am figuring that this would be over $20,000. so not a real option at this time.

the cheapest option = just leave things how they are. but i want to blow in a lot of cellulose. and idk how well the old 2x4(not real 2x4's) would handle whatever that would weigh.

9' ceilings

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Old 07-16-2012, 08:50 PM   #2
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bowed ceiling joists :(


do you have trusses? are they spaced 2 foot on center? if so you need to use 5/8 drywall

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Old 07-16-2012, 09:22 PM   #3
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bowed ceiling joists :(


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Originally Posted by pardonme2711 View Post
do you have trusses? are they spaced 2 foot on center? if so you need to use 5/8 drywall
no, it is stick built. a pretty old house. idk just how old, but 100y/o is possible.

16" on center, give or take .

west side of house has 12' spans. east side has 14' spans.

the drywall is not sagging. its the joists.
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Old 07-17-2012, 05:57 PM   #4
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bowed ceiling joists :(


what size are your joists? its possible they are spanning 2 far. older homes used 2x8's often.
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Old 07-17-2012, 08:07 PM   #5
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bowed ceiling joists :(


as stated, they are non real 2x4's . i am figuring that the ceilings were sagging from day 1, and just got worse from there.

if i had the money, i would have the whole roof/ceilings taken off and all new put in. but i don't have 15-20+ thousand sitting around.
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Old 07-17-2012, 08:13 PM   #6
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bowed ceiling joists :(


Well is your roof framing in rough shape as well? All you need is to beef up your ceiling joist. Makes it a little harder with the P&L, but I would tear that out as well..
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Old 07-17-2012, 08:17 PM   #7
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bowed ceiling joists :(


There are many ways to correct this issue. However, it won't be easy, and will very likely involve numerous steps.

What other information can you provide so we can help?
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Old 07-17-2012, 08:48 PM   #8
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bowed ceiling joists :(


it has a new roof(shingles). the roof sheathing, well, its not the greatest, but its still serviceable. so, yes, all i "need" to do is make it so that i can blow in at least 24" of cellulose = this is the "main" goal. there is about 4" of old nasty, but still working, fiberglass batts now) . i figured i would put the drywall up there to make the ceiling look nicer. but i can do without it, and leave the ceiling finish "as is" (it doesn't look bad. i just don't like it)
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Old 07-17-2012, 08:54 PM   #9
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bowed ceiling joists :(


oh. i think i am beyond wanting to "flatten" the ceilings. i just want them to hold the weight of the insulation. and not cost my left arm.
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Old 07-17-2012, 08:59 PM   #10
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bowed ceiling joists :(


1 option, would be to build a whole nuther ceiling, below the current one. i can do that, and i wouldn't mind the lower ceilings. but idk about the weight. i may then have to replace the main beam in the basement. snowball effect.
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Old 07-17-2012, 09:41 PM   #11
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bowed ceiling joists :(


A far simpler way is to remove the plaster and lath and sister new wider joist.
You would have to notch the ends so there lower but can still rest on the top plates. If it's old ballon walls there just going to be boards run horizontal to set them on.
I've seen 20 ft. runs with those old 2 X 4's. When someone stood in the bedroom above the ceiling it came down about another inch.
We ended up using LVL's so we could make the span but keep the ceiling height loss to a min.
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Old 07-17-2012, 11:36 PM   #12
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bowed ceiling joists :(


Quote:
Originally Posted by joecaption View Post
You would have to notch the ends so there lower but can still rest on the top plates.
Sometimes you can angle the top to follow the roof.

Sistering is the easiest best way, won't cost to much.

Perhaps you can do a room at a time?
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Old 07-18-2012, 07:54 PM   #13
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bowed ceiling joists :(


Quote:
Originally Posted by joecaption View Post
A far simpler way is to remove the plaster and lath and sister new wider joist.
You would have to notch the ends so there lower but can still rest on the top plates. If it's old ballon walls there just going to be boards run horizontal to set them on.
I've seen 20 ft. runs with those old 2 X 4's. When someone stood in the bedroom above the ceiling it came down about another inch.
We ended up using LVL's so we could make the span but keep the ceiling height loss to a min.

20' my ceiling bounces a little when i carefully walk on it, and it is only 14'. i think sistering is the way to go.
Quote:
Originally Posted by mae-ling View Post

Sistering is the easiest best way, won't cost to much.

Perhaps you can do a room at a time?
i am kinda doing 1 room at a time. but i have many rooms to do. and not a lot of time to do them.
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Old 07-24-2012, 09:02 PM   #14
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bowed ceiling joists :(


ok, guys. it looks like i am going to sister, in the attic. what i need to know = 2x6 or 2x8 ? i am sure 2x8's would work, as the main floor joists are 2x8's. but since this isn't going to be a room floor, 2x8 may be overkill.

as mae-ling said. it looks like i can angle cut the the top a little to fit where to roof comes down. with a 2x6, i may not even need to do this ( i need to look a little closer)
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Old 07-24-2012, 09:11 PM   #15
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bowed ceiling joists :(


Quote:
Originally Posted by joecaption View Post
I've seen 20 ft. runs with those old 2 X 4's. When someone stood in the bedroom above the ceiling it came down about another inch.
i just reread that. the 2x4's were the floor joists ? omg
i am surprised they didn't break.

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