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Frequently Asked Questions



Which side do I use?


Use the rough side facing out when you are adhering tile to the surface. The rough side creates an ideal mechanical adhesion. 
Use the smooth side when using GreenE-Board™ as a replacement for drywall. 


Do I need to prime GreenE-Board™?


You only need to prime GreenE-Board™ if you are using it as a replacement for drywall.

You MUST use an acrylic latex or oil based primer. It CANNOT be a normal latex paint, only an acrylic latex primer.


What kind of paint/primer can I use?
You must use one of the following a) Acrylic Latex paint and or primer or b) Oil Based paint and or primer

You CANNOT use normal latex paint, it must be an acrylic latex or an oil based paint product.


What should be used to cover the screw heads and fill the seams?


You can use Redgard or a rubberized membrane that is approved for tile use.


What type of thinset should be used when I am tiling over GreenE-Board™?


Modified thinset should be used, however, please use unmodified thinset when using the Schleuter system.


Should there be a vapor barrier behind the GreenE-Board™ on exterior walls?


Yes, this is required as it is code. However, it is not necessary to put a vapor barrier behind GreenE-Board™ on interior walls.


When installing GreenE-Board™ surrounding a tub should the board touch the top of the tub?


Please leave a 1/4" gap at the top of the tub for caulking.


Can GreenE-Board™ be used around fireplaces?


Yes, however you must prime and seal the board with a penetrating sealer. It MUST also be tiled. If you do not takes these steps (prime, seal & tile) then GreenE-Board™'s surface may crack due to expansion and contraction from the various temperature swings.


Can electric heaters be installed on GreenE-Board™?

No, we do not recommend installing electric heaters on GreenE-Board™ as it causes the board to dry out and crack.


Do you have a CCMC?

Our CCMC number 13417-R is not currently active.

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