Frequently Asked Questions Things we get asked a lot! Do I (or my builder) need special skills to build with Grid-WALL? If your builder can run a saw and a level, he can build with Grid-WALL.  It is forgiving of changes and errors until it is filled with concrete.   With so much concrete in the walls, how well does the insulation properties compare with traditionally built wood framed walls? Grid-WALL’s combination of insulation and thermal mass creates a structure that can reduce energy consumption over 50% as compared to traditionally built wood framed walls.   Will the styrofoam in the blocks burn? Even though our blocks are made of 85% styrofoam, they will not support combustion.  See a video demonstration of how well this material performs when it is exposed directly to the flames of a blow torch.   Your blocks are square.  How difficult is it to create curved surfaces or arches? Grid-WALL is actually one of the easiest systems available to create any kind of curved surface.  The curved design is drawn onto the blocks, the line is cut, and a thin piece of flexible fiberboard is inserted.  This stops the flow of cement during the pour.  Afterwards, the fiberboard and the material below it is removed, leaving perfect arcs.  The blocks can be cut to create custom angles quickly and easily, making any curved or angular wall possible with little difficulty.  More information is available in the construction section   Does it take longer to build with Grid-WALL? Erection time is cut with the Grid-WALL system.  It goes up FAST and EASY.   What about termites? Termites and other insects cannot eat or burrow into Grid-WALL. No insecticide additive is necessary for our blocks.   Do I need to stagger the blocks like bricks? No! But you MAY stagger them, if you prefer, so long at the voids are aligned.  Stacking the blocks straight up is the preferred method.  It is more critical that the holes line up to create the solid concrete gridwork.  Straight stacking means the inner grid work will be aligned, which is imperative in this construction method, but it also makes bracing more convenient.  It is much easier to brace the vertical seams if they align.  More information about this particular method of bracing is available here   How much concrete does it take to fill the blocks? It takes about 1 cubic yard of concrete to fill about 100 sq. feet of wall area.   Do I use #4 rebar in every hole? All plans should be reviewed by an engineer. The usual placement is #4 rebar horizontally and vertically. In some areas you might use less, it just depends upon the engineering.    Do I need to put up wood strips to put up sheetrock? No. Glue and screw sheetrock directly to Grid-WALL™.   What about Plumbing and Electrical?  Can they go inside the walls? Yes.  Use conduit for electrical wiring and place the electrical conduit and the plumbing in the voids prior to pouring the concrete. More details and photos available here   Didn't find the answer to your question here?  Feel free to and we will reply promptly!