Foamboard on plywood

[GP30]

I have a question. I posted a thread on code 55 vs 80 track and switches. Thanks for all the helpful info. After reading posts on here, I see some of you use plywood on top of your benchwork, then glue the foamboard to that. My question is, does this really need to be done? and here's why I am asking. Years ago when I built my layout, I built my bench work, then just glued the foamboard to that. Now this layout has been through 2 moves and just one of the foamboard pieces have come loose after all it's been through. Should I dismantle the whole layout table top and cover the benchwork with plywood and then glue the foamboard down, or should I just reglue the loose foamboard piece back to the benchwork and just leave everything be like it has been for years without the plywood? Thanks

Johnny B

 

[dgwinup]

It's not something that HAS to be done. Many modelers do it, especially to get something solid to mount turnout machines and wiring under the layout.

If your layout has withstood the rigors of moving, I think I'd keep it as it is. It might not be simple to lift up the foam and install plywood underneath.

Just my opinion, but I'm lazy and wouldn't tear up a perfectly good layout just to put plywood under it! LOL

Darrell, quiet...for now

 

[ICG/SOU]

I'm no expert, but if it ain't broke....

I did mine with plywood and foam, but only because the guy helping me build recommended plywood (yet didn't recommend foam). I got the foam later.

 

[tankist]

some say it gets to heavy with plywood.
IMHO it is absolutely necessary.

 

[GP30]

Thank you all for your replies. After taking another look at the layout last night, I determined that the 2 end pieces of the layout are very solid and would be a pain in the butt to break loose to put plywood up and underneath. I'm going to repair the loose stuff and continue forward with rebuilding my layout.

Johnny B

BTW: This site is very helpful because of people like you guys. Thanks for all the help

 

[UP2CSX]

If a layout is going to be moved, foam is a much better choice. If this was my last layout and it was going to stay firmly anchored in place, I'd agree with Anton on plywood. I'm not sure how yours is done but a lot of lightweight layouts are 2" foam framed with ripped plywood. They are amazingly strong as long as you don't stand on them. As you've seen, repairing torn or fractured foam is not difficult and the repair will be about as stong as the original foam.