On a detached building 24’x16′. 24″ OC 2×4 ceiling joists.
I’m going to blow cellulose on top of the drywall. Even if I blow R40, that’s only 1.25 lbs/sq ft.
If I double screw the field any concerns with using the thinner sheets?
This is a weight issue not cost. Those big sheets are heavy.
Adam
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Replies
With 24" between rafters, I'd reccomend 5/8".
Absolutely 5/8" on 24" centers always.
Mike
Small wheel turn by the fire and rod, big wheel turn by the grace of god.
24"oC... 5/8 rock...
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1/2" ceiling board
http://www.americangypsum.com/products/product_detail.cfm?p_id=135
http://www.gp.com/BUILD/dealerlocator.aspx?pid=5435
Edited 10/18/2009 1:58 pm by mikeys
Thank you! I didn't know there was a product specifically for ceilings!
1/2 inch ceiling board it is. I never noticed ceiling specific board before but a quick look on line and there it was. $29 for a 4x12 sheet at the local building center. Thanks all,Adam
Is that cost effective compared to a 12' x 5/8" sheet?
I know you are in Canada, but in California a 12' x 5/8" is around 10 bucks. Mike
Small wheel turn by the fire and rod, big wheel turn by the grace of god.
Regular 1/2", 4'x12' is $21.50. I'd have to look and see what the price is for 5/8" x12', if it's available. 5/8"x8' is $20.50, 1/2"x8' is 14.00. I would guess if I could find the 5/8x12' the price would be comparable to the ceiling board.Adam
Ceilings get done with 1/2" ceiling board. About the same weight as regular 1/2" but much stronger.
Use 1/2" ceiling board it is stiffer and more ridgid than the 5/8" board.
Agreed. We always use 1/2" ceiling board unless there is a definite call for 5/8" as in Type X fire rated.
Just may have to wait about a month for the 1/2" ceiling board..it's a special order and not many yards stock it.
Oh ok, out here it is all that is used unless fire code is prescribed.
5/8" on 24" centers - makes a nice ceiling. 1-5/8" screws.
My area's supply situation, don't know about Calgary:
I can very occasionally get 1/2" ceiling board, OTOH, can always get 5/8" type X. Pro suppliers here will have 8', 10', 12' and 16' (never been nervy enough to try 16'); BB stocks 8' and 12'.
When I can get 1/2" ceiling board, it costs more than 5/8" type X, and frequently is not available in longer than 8'.
5/8" is heavier? - yeah it is, which is why I automatically rent a lift -- goes up easy - very hard to tell from 1/2" on the lift........
Jim
Edited 10/18/2009 3:37 pm ET by JTC1
Strap it at 16" and use half inch regular rock.
Dinosaur
How now, Mighty Sauron, that thou art not brought
low by this? For thine evil pales before that which
foolish men call Justice....
I only need 8 sheets. The cost difference between the regular with strap vs. ceiling board would only be about 20$. Adam
I suggested that because (a) it's not clear whether ceiling board is available from your suppliers, and (b) some rockers prefer to hang ceilings from strapping anyway, because you're screwing into a 2½"-wide strap rather than a 1½"-wide joist. Makes it harder to miss, even working overhead with a crick in yer neck and gyprock dust in yer eyes....
;o)
Dinosaur
How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....
If I couldn't find the ceiling board or 12' x5/8, strapping would be the way to go. Thanks for the input.Are the pretty fall color all gone yet in your neck of the woods? I moved from Montreal a couple years ago and miss the fall color change.Adam
The maples are mostly bare, but of course there're still leaves on les trembles so there's patches of gold up on the hills across the lake. Warming up nicely today; supposed to hit +11.
Skiing opens in 3-4 weeks, I think. The snowmakers will get their seasonal recall to the mountain on Nov. 2.
Dinosaur
How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....
High up in the mountains, we get the larches changing in late Sept. Similar to the Tamarck in your area. Valleys look very nice with a carpet of gold, but nothing like the reds the maples give you. They started to blow snow two weeks ago during our early cold snap. The leaves weren't even off the trees yet.Adam
That mountain obviously does not belong to Intrawest, LOL.
We start blowing 'snow' a week before scheduled opening, no matter how warm it is that week nor how cold it was before that. Can't bring the guys in early; that costs money not in the authorised budget.
I don't really care; I use my seniority to spend as much of my time as possible in the few places we don't blow that artificial crud--glades, a few old trails.
Dinosaur
How now, Mighty Sauron, that thou art not broughtlow by this? For thine evil pales before that whichfoolish men call Justice....
are you seriously trying to use a 2x4 ceiling joist to span 16'???
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Or do you mean maybe that you have trusses with a 2x4 bottom chord?
Welcome to the
Taunton University of Knowledge FHB Campus at Breaktime.
where ...
Excellence is its own reward!
I guess bottom chord of the trusses would be more precise. Peaked roof with about a 3/12 pitch. The garage has probably been there 35+years. Pretty dry here so snow load is minimal.Adam