I'm building a Lego city, and I want to permanently glue the road onto the table. But I don't want it to be "lumpy", or melt, and I want to make sure that the baseplates will not come off the table, whether it be water or indirect heat (such as sunlight). A friend suggested furniture glue, but I'm not sure that'll be strong enough or flat enough.

Any ideas welcome.

You could always put a screw through a 2x2 plate and use it to fix the corners, the rounded corners on the road plates won't be damaged, and you only lose a very small, cheap part.

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  • Nice, but I'm going to guess that the middle of a baseplate is still going to flex a lot unless you take care as to how you remove elements from it. – gev Aug 10 '14 at 9:26
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    If you use technic plates with the holes, you might not even damage any pieces at all. – Mr. Shiny and New 安宇 Aug 10 '14 at 22:44
  • My only immediate concern would be the edge of the table then. – Jesse Schweitzer Aug 13 '14 at 1:39

I mounted baseplates to a sheet of plywood in order to hang a mosaic as follows:

  1. Roughly sand the plywood and the backs of the baseplates.
  2. Squirt a generous helping of Liquid Nails on one of the surfaces.
  3. Lay out your baseplates on the plywood using regular plates as spacers (i.e., attach plates across the boundaries between two baseplates in order to maintain correct spacing.
  4. Randomly distribute plate elements across the surfaces of the baseplates.
  5. Clamp a second piece of plywood across the top of the plate elements.
  6. Let dry/cure for 24 hours.
  7. Remove all of the plate elements.

The reason for step (4) is to create a level surface on which the top sheet of plywood can press when clamped.

  • This is a good idea, except the table will be 4' by 8'. Harder to clamp and distribute weight, but not impossible. – Jesse Schweitzer Aug 13 '14 at 1:40

LEGO plates are made from ABS plastic, as are plastic shower surround materials. Buy a caulk tube of shower surround adhesive (I have used loctite power grab from Home Depot $5). Scuff the back of the LEGO plates with some sandpaper and apply the adhesive with a fine notched trowel and slap it on your wood ;) Gently press any lumps out. To date I've made 4 LEGO tables like this and it works wonderfully.

Have you considered using velcro-strips? You can cut it to whatever size you want and it won't permanently damage your basepalces like glue wood. And there is also various versions of two-sided tape. Some of them are very strong and can even hold picture-frames on walls. So they should definitely hold baseplates down.

  • The problem I foresee with velcro would be the uneven "lumps" where the velcro straps would be. – Jesse Schweitzer Aug 13 '14 at 1:41
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    I have used velcro on baseplates and it wasn't lumpy or uneven. Velcro comes in different shapes, sizes and thickness. There are some that are very thin but still have enough grip. If you add enough it is fine. I used the small dot kind that is very thin on 32x32 baseplates; at the corners, few on the sides sides and few in the middle. If you do full strips of the thicker Velcro on all sides and a larger piece in the middle it should even be more stable and should still be fine (not lumpy). If you're interested I would suggest to check with your local craft/hobby store and see their selection. – TheBrickBlogger Aug 13 '14 at 13:11

I used spray-on contact cement (the kind where you spray both surfaces, wait for them to get tacky, and then press together).

It worked okay but the baseplates slid out of alignment over time and started coming off around the edges.

If I did it over again, I would use nuts and bolts after first aligning all the baseplates with each other using small plates, like Windfire though not necessarily through the plates. The important thing is they be well tightened and evenly spaced. And if I needed to fix or replace a baseplate for some reason then that would have been easier with bolted-on plates as well.

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