I have a question for you guys. I wonder if it’s a good or bad idea to use latex caulk between the fascia edge and scenery to avoid cracks? You will add scenery on the latex caulk as well to hide it.
Or is this maybe not a problem? I made a simple picture to show what I mean. You look at the layout from above: 
In past years, I used Liquid Nails adhesive to hold the fascia board to the wood table and any adjacent scenery. I’d then run some scenery over the top of the fascia board to make it appear things were growing over the edge.
I stopped doing this because scenery changes needing fascia board removal often required the used of a high-powered Tim the Tool Man jackhammer…always resulting in extensive damage to the fascia board and scenery.
I now use threaded fasteners to attach the fascia board to the wood table front. Removal is easy & quick when necessary.
Mac
Snö och köld rida ut i Sverige nu?
I fastened my fascia with liquid nails and clamped it in place for 24 hours, with the upper edge of the fascia approximately 1/2 cm above the top of the layout. I then put a bead of clear silicon sealant between the layout edge and the fascia. This kept scenery from dripping down behind the fascia and onto the floor when I poured fairly watery desert scenery consisting of dirt from my back yard, cinnamon colored latex paint, water, glue, shredded bark, etc.
I am chimeing in with the others in agreement. I used caulk for the fascia, as well as in between my foam panels that I used to make up my benchwork. Good stuff. it is also great for glueing your buddies screwdriver to the work bench… but that is another story…[8D]
Check this out, electrolove. http://www.fcsme.org/bcarl/basic_scenery.htm
That dude uses rolled up paper towels to fill in cracks in most everything. Looks like it works pretty good, too. Probably cheaper than calk or liquid nails.
Latex caulk will work just fine. I used it to not only glue down track, but to fill all sorts of small gaps on my foam-based layout. Just realize that it’s not easily carved or sanded, so once you add the caulk, make sure to shape it right away.
My fascia is held in place with screws. I use light weight acrylic spackle to fill the gap between the foam and fascia. and run the scenery over the top of the fascia.
Nick
Here’s a thought! Read the tubes of available latex caulk at the home depot or wherever, and get the kind that says “paintable” as a lot of them are not! Wait a few days for the skin to cure, then you can paint it with your earth deck color, before adding turf and shrubs. It works great on portable modules with foam decks that flex a little. jc5729