Hardie Board

Hardy board, is another product made by James Hardie. Unlike Hardie siding, Hardy board can be used in the bathroom on the walls, before hanging tile. It can also be used as a subfloor before tile is laid over it. Hardy board comes in 4x4 sheets, 4 x 8 sheets, and 3 x 5 sheets to better suit the needs that you need it for.

Hardy board also comes in either half inch thickness or in quarter inch thickness. When you are using it on the walls that is a good idea to use 1/2 inch Hardy board. Half-inch is better because it is the same thickness as the drywall that is used therefore making a smooth transition from Hardy board to drywall. A half-inch on the walls does not need any backing behind it, they can hang directly on the studs.

When using Hardy board as a subfloor before putting down stonework pile, it is important that you have a least a three-quarter inch plywood subfloor underneath that. It is important that you use this pic of an underlayment under the Hardy board to keep the finished product from flexing and causing your tile to crack. It is also required that you float and tape the seams of the Hardy board. It is recommended that you use a 2 inch fiberglass mesh tape and a multipurpose thinset.