I've read about people stacking several cake boards together for strength. How do you keep them together? I'm guessing with squares or rectangles yolu could tape them cover the board with something. I have scalloped ones and want to stack three for a cake I'm doing-could I glue them? Or is there another option? Or should I get regular round ones?
I use non-toxic glue sticks to glue boards together, and to glue foil to the boards. When gluing multiple boards together for strength, I will make sure the corragation 'stripes' run in opposite directions, sort of criss-cross, to add to the stability.
I've read about people stacking several cake boards together for strength. How do you keep them together? I'm guessing with squares or rectangles yolu could tape them cover the board with something. I have scalloped ones and want to stack three for a cake I'm doing-could I glue them? Or is there another option? Or should I get regular round ones?
on those scalloped boards I like to glue a smaller non scalloped one between them ..sort of a cake board sandwich..lol
when I have HUGE cakes to deliver I use foam core board that I glue wrapping paper onto..then I glue my cake that has been put onto a a plain cake board onto the decorated foam core board..usually the gold scalloped board..I do my bottom border on this cake board.
these are all great tips! I guess I could just trace wrapping paper around the scalloped edge-but then does the icing grease up the paper??
Also, I was watching Food Network's Candy Castle challenge and saw a woman stacking her top cake with a board underneath. Is that the way it's done? Tiered cake have boards in between the layers? 
How do you gett he dowel all the way through both(or all) layers??
I poke a hole through the individual board(s) before stacking, so that when I put one long dowel through the tiers, it easily goes right through. I also sharpen the end of the dowel.
I just had this issue myself tonight lol. I normally take two of the same board and use DUCT tape and tape them together then wrap with foil and tape tha back of the foil so it doesn't come off.
Tonight I was down to one regular rectangle plain white board so I ran to the store to pick up another pack and low and behold they don't have ANY! So I had no choice but to get the scalloped edge "Show N Serve" boards which are prettier anyway but a tad more expencive and made me not want to use more then one lol.
So I asked my husband "hunny can you find a way to take this plain one and stick it to the back of this pretty one and not mess up the pretty one or use anything toxic or harmful to people?" so what's he do? He grabs the duct tape again and takes some strips, folds them over, and places two on each end and one in the middle and then centers the smaller plain board on there. It worked great! And I didn't even have to cover it with foil and worry about how I'm going to make those scallops! 
Hope this helps!
You can also purchase what is called Cake Drums, they are about the thickness of 3 regular boards, you can buy them already covered in white, gold or silver. They are great for heavier cakes. You could cover these with material or other paper and cover with the clear contact, but they are already covered.
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