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What type of plywood should I use for an outdoor holiday display?

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Forum topic by JayVek1972 posted 08-11-2016 12:59 PM 514 views 0 times favorited 8 replies Add to Favorites Watch
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JayVek1972

3 posts in 139 days


08-11-2016 12:59 PM

Topic tags/keywords: finishing question

Hey Woodworking Guru’s,

I made my first outdoor Christmas Nativity scene last year. This was my first woodworking project by the way, so needless to say I am a NEWBIE. After painting the plywood with exterior paint (2 coats) I placed it out in the front yard and after 2 rain storms I noticed that the “building” was bowing forward.

My question; what type of plywood should I use and any tips or tricks I can use for the ones I will begin making this year to make them better?


8 replies so far

View johnstoneb's profile

johnstoneb

2143 posts in 1632 days


#1 posted 08-11-2016 01:05 PM

Use an exterior grade plywood fill any voids in the edges before painting. I think the reason it bent forward is you have a tall piece without any reinforcement. To stop the bow reinforce the back edge with another piece about an 1 1/2 wide.

-- Bruce, Boise, ID

View waho6o9's profile

waho6o9

7166 posts in 2036 days


#2 posted 08-11-2016 02:02 PM

MDO ( medium density overlay )

Nice work JayVek1972 and welcome to LumberJocks!

View Paul's profile

Paul

441 posts in 3049 days


#3 posted 08-11-2016 02:37 PM

I think Marine Grade plywood is what you want. If you can make a boat out of it is should hold up to a little rain.

-- If you say 'It's good enough', it probably isn't.

View GR8HUNTER's profile

GR8HUNTER

1130 posts in 172 days


#4 posted 08-11-2016 02:48 PM



Use an exterior grade plywood fill any voids in the edges before painting. I think the reason it bent forward is you have a tall piece without any reinforcement. To stop the bow reinforce the back edge with another piece about an 1 1/2 wide.

- johnstoneb

AGREED …..... just fill edges with bondo ….....or could use 2X4 treated for reinforcement

-- Tony Reinholds,Pa. REMEMBER TO ALWAYS HAVE FUN

View woodbutcherbynight's profile

woodbutcherbynight

2408 posts in 1868 days


#5 posted 08-11-2016 03:24 PM

Nice work. Like others mentioned it needs a stiffener board on the back to make it more rigid. Even if you used 3/4 marine plywood it would bow without additional support.

-- Live to tell the stories, they sound better that way.

View Fred Hargis's profile

Fred Hargis

3925 posts in 1952 days


#6 posted 08-11-2016 03:42 PM

MDO is made for outdoor painted signs, kind of just what the doctor ordered. Just don’t confuse it with MDF! Even better, because of the layer of whatever that stuff is on the surface, it’s really smooth and takes paint well.

-- Our village hasn't lost it's idiot, he was elected to congress.

View JayVek1972's profile

JayVek1972

3 posts in 139 days


#7 posted 08-11-2016 04:02 PM

Thank you, guys..!! I appreciate the help, knowledge and encouragement..

View GR8HUNTER's profile

GR8HUNTER

1130 posts in 172 days


#8 posted 08-11-2016 04:02 PM



MDO is made for outdoor painted signs, kind of just what the doctor ordered. Just don t confuse it with MDF! Even better, because of the layer of whatever that stuff is on the surface, it s really smooth and takes paint well.

- Fred Hargis

correct

http://www.canply.org/english/products/overlaidplywood.htm

-- Tony Reinholds,Pa. REMEMBER TO ALWAYS HAVE FUN

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