Quote from: Doneldon on November 15, 2012, 01:45:00 AM
Grim-
I'm guessing that you don't need to remove the grass mat from your plywood each year. That being the case, try
spray adhesive or plastic-safe adhesive caulk. Both have enough flexibility to stand up to handling and they won't dry
out like double-sided tape. Use a putty knife or mastic trowel to spread the caulk very thinly. It will cure pretty
quickly when spread like that so you might want to work your way across your board in stages. If you decide to go
with the tape, use carpet tape because it won't dry out either.
Adhesive caulk will also do a good job of holding your track to the carpet mat since it has heavy body which will fill
the area between the irregular grass mat and the bottom of your track. I strongly urge you to use a unitary track
product which has the track already attached to plastic roadbed. Bachmann's EZ Track is one of several excellent
brands. It's to your advantage to stick with one brand of track because it can be annoying to connect different brands
together. The best technique would be to affix the grass mat, set up the track in its final position, hold it
in place with masking tape as needed, use a utility knife to cut through the grass all around the roadbed (taking care
not to move the roadbed as you go), remove the track, scrape the grass from under the tracks, and then glue the
roadbed and track directly to the wood. It took many words to describe that sequence but it will go quickly. The trick
is to make sure your track is all tightly and accurately connected before you cut around it.
For the sturdiness you'll need for a layout which will be handled, use 3/8" plywood and a 1"x3" or 1"x4" frame, with
cross pieces every 16". This will also give you the underboard space you need for wiring. Be sure to beef up the
center of the board if you plan to put your tree on it. Plywood is strong stuff but it will sag significantly if a tree sits on
it for several weeks. In addition to being unsightly, it can screw up your track to the point of operational problems,
particularly if you add features like turnouts (switches) or crossings.
Christmas layouts tend to be more funky that realistic, which is just fine, but I suggest that you add 1" or 2"
extruded foam insulation board on the top of your plywood if you plan a more detailed layout. That will enable you to
cut ditches or waterways into the surface, while staying below your roadbed. It will also afford the possibility of
adding a bridge. Incidentally, you can use the foam without any plywood if you won't be placing your tree on the
layout. That will save some cash and a lot of weight.
Have fun and good luck! And Happy Holidays!
-- D
Thank you for all the good information, was very helpful. In my case, the grass will be temp and taken off each year since I actually have a folding 4x8 due to storage space limitations. Therefore, looking for something I can take off and put on each year. You also had some good ideas about adding foam and such which I will consider. In my case, the tree will be sitting on the board, but still might be good so I can add more detail. I also do own Bachmann trains and the eztrack. Just haven't had a chance to setup yet until I get the board squared away:)
Thanks again.