| Author |
Message |
DaveD (206.47.98.151)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 01, 2002 - 9:01 am: | |
I'm at the point where I am ready to start building the partitions between the bedroom, bathroom and galley areas. I am planing to use 3/4" plywood for the partition between the bathroom and the the bedroom; same for the wall between the bathroom and the galley. We are using a side aisle design, rather than a split bath. For the wall on the bathroom facing the aisle, I am planning to build this with 1" x 3" lumber and luan.
Should I have any concerns about the long term dimensional stability of the 3/4" plywood used?
Any other suggestions?
DaveD |
DaveD (206.47.98.151)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 01, 2002 - 10:03 am: | |
What I really meant was not dimensional stability, but whether 3/4" plywood used in a vertical application, like I am thinking of, will warp. I will be bulding a closet and chest of drawers on the bedroom side of the rear bathroom wall, so that may help reinforce it.
DaveD |
OAE Palmer (208.164.102.64)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 01, 2002 - 1:51 pm: | |
Dave ,
if you want some security with plywood, use marine grades.
If you have a concern about sagging or bloating from moisture, it could only be because you are not using enough verticle studs...
12inches on center will give you all the strength or security you will need,
because 3/4 in plywood is really overkill for that wall,
assuming that it will be a hollow wall with dead air in the middle ...half inch face plus 2 inch studs plus eighth inch Luan...makes for a pretty sturdy wall especially when you screw it together..and it is as small as it is and tied to the floor and roof (how are you fastening the top and bottom?) |
Scott Whitney (24.205.239.4)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 01, 2002 - 2:55 pm: | |
I am not sure, but was guessing from his post that he is building the wall out of 3/4" plywood without any studs?
I made my own studs by ripping 2x4s into two pieces of exactly 1-1/2 x 1-1/2. (a small strip is left over as scrap, but makes great fire kindling) they make framing easy as I can orient the studs any direction as they are perfect squares. Using 3/8" plywood for wall skins. That might be a little thin. I may go a bit thicker for the next section I tackle. Or I may just glue block foam inside, even for interior walls, which adds considerable stiffness. So far, I have only done one side of the walls, so my options for the second side are still open.
Scott |
Geoff (64.1.1.17)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 01, 2002 - 4:18 pm: | |
I wouldn't use a straight piece of plywood for a wall, if that is what I am reading. Do you have a mig welder? 1" square steel tubing makes an excellent frame for a wall, just screw your finshed paneling over it and it will never warp!
--Geoff
'82 RTS CA |
Jim Stacy (12.87.108.152)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 01, 2002 - 9:14 pm: | |
We used double face 3/4 oak plywood without studs for all the partitions. Glue using Titebond II and cleats where you can. Make every wall have a short 90 degree wall join it at the edge. This will provide the stiffness of a stud wall without the wasted space. Cover plies with dimension lumber.
Fourty thousand miles and no cracks, squeaks, or change.
Jim Stacy |
DaveD (206.47.98.151)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 01, 2002 - 10:36 pm: | |
Scott,
You're correct. I was thinking of building the walls out of 3/4" plywood without any studs. The bus washroom was built this way, but of course the walls for that washroom were pretty narrow. I plan to build a closet (with studs and luan) atached to the bedroom wall and in the bathrrom, I will be building in a vanity fastened to the front wall of the bathroom. My main reasons for considering this approach are to save space and simplify construction.
I could possibly also make some pretty sturdy walls using dimension lumber and luan glued together.
DaveD |
Gary Carter (216.17.71.35)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Monday, April 01, 2002 - 11:30 pm: | |
Like a prior poster I used 3/4" oak veneer plywood for all walls without studs. They have been up 10 years with no sign of warping. |
FAST FRED (209.26.87.21)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, April 02, 2002 - 5:18 am: | |
There is only one wall on my conversion that has no cabinetry in the other side to stiffen it up.
I used 1/2 ply for the walls and all the cabinets , no problems , with fairly heavy weights in drawers.
Marine ply is used if a structure subject to constant wetting and drying needs to have no internal voids, to keep from rotting in place.
Furnature grade ply is more thin plys ,(5 or 7 in 1/2 in) there fore stiffer.
Almost all plywood today is excellent water proof glue. To check the glue , cut off a hunl of ply and boil it for at least an hour , then sit in boiling pot overnight.
If it doesnt come unglued , it passes any test for marine ply waterproof ness.
The lighter the interior the faster you get up the hills.
FAST FRED |
DaveD (206.47.98.151)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, April 02, 2002 - 10:44 pm: | |
Thanks for all the advice.
DaveD |