Has anyone ever used the foam board on top of the plywood for a cookie cuter layout ??? Any reply is welcomed and thankyou for takeing the time to reply
If you use 3/4 foam and back cut it so it flexes it should work. Clamp it when you glue it. Use blue or pink foam not white.
foam board is different then extruded foam (the oink or the blue stuff) If you are not referring to extruded foam I do not recommend it as foam board or foam core board is a laminated paper product and will not hold up when you use stuff like wet water or alcohol for scenery work. unless you seal the ends of the board some how.
Now you have my curiosity, I am going to ballast some and soak some and will find out for sure, not just what everyone says as they told me I could not use it for a seamless backdrop, they lied!
Yes. I used 3/4" foam sandwiched to 1/4" Luaun plywood.
Like thusly.
and thusly…
I needed the thin plywood to achieve some tight clearances where the loops cross. With adequate bracing it’s held up for years with no problems.
Lee
I believe the key is to seal the edges of the foam core board. I have seen Howard Zane use Gatorboard to make his waterfalls but don’t confuse that with foam core bard the stuff sold in the craft stores thats used for mounting photographs etc.Gatorboard is much harder where as foamcore is pliable and will curl up if you get it wet. If I am not mistaken the O/P is mixing up the names confusing it with extruded foam. That you can ballast and get wet etc. without severe consequences
I personally have used foam board in a few places to put safety fences around hidden staging yards. Others think highly of it as a basis for structure modeling. My track is laid on thin foam over plywood - but the foam is not foam board. It’s sold as 'fan-fold underlayment" and is meant to be used under vinyl and metal house siding.
IMHO, the best course is to experiment with a few sample lengths of track. I found that card stock (about the same as thin cereal box material, but smooth surfaced) cooperated with water-based adhesives and scenery techniques if it was first sealed with paint.
Chuck (Modeling Central Japan in September, 1964 - in twice-N scale; 1:80, aka HOj)
Where do people get this stuff,foam core is not pliable and will not curl when wet (although the surface paper may but have not found that to be the case as I have mudded it and painted it with washes and no problem and ballast drys a lot faster than mud (or joint compound for those of you not in the trades.