Chris and Candy

10:45PM | 01/07/00
Member Since: 01/07/00
1 lifetime posts
what are the "lego" type foam blocks that are glued together to make walls and then filled with concrete called? Who makes them? Are they any good?
Any other thoughts on them?


02:30AM | 08/02/00
Member Since: 07/31/00
59 lifetime posts
Pretty sure you are asking about ConForm Industries SmartBlock. Saw them on a Bob Vila show some years ago. Don't have any personal experience with them yet, but am seriously considering them for a foundation we'll put in next year or so. Might be another manufacturer like them, but haven't found them yet. Check out


07:23PM | 12/31/00
Member Since: 12/31/00
1 lifetime posts
Integrated Concrete Forms is the name given to a wide variety of polystyrene forms that are concrete filled. Very exciting stuff and relatively new for most builders.

Best site to learn about this stuff is:

This link is also a great source of info:


05:20AM | 03/19/01
Member Since: 03/18/01
3 lifetime posts
These blocks are called ICF's or Insulated Concrete Forms. You might want to check out

I'm in the process of finishing my own ICF house. Aside from some issues with the contractor not quite being able to lay the blocks straight and plumb I've been happy. You get a tremendous insulation value, no air leaks, great soundproofing. The house is tornado-proof (for the most part), soundproof, bulletproof , etc...

They do take a bit of planning and depending on the type of block you go with they're more expensive than a stick built house.

There are 2 main types of blocks. Flat wall and waffle-blocks. Waffle blocks are my preference because they have more foam, less concrete and therefore insulate better. They're called waffle blocks because if you pull the foam off, the concrete is a series of posts and beams with a web in-between (it looks like a waffle-grid).

Good luck!



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