A Hardie board is a specialized material that customs cement filaments to make long-lasting, strong, and good-looking inventions. It is made from water, sand, silica, limestone flour, and fibers such as Kevlar or fiberglass, roughage, fiber made out of wood, etc.

This board is usually 1/4-inch or 1/2-inch thick and 3 feet by 5 feet long. This creates a material that can secure the surfaces of houses. Hardie board is new material, but it is very advanced. And it has proved its worth whenever it was used.

This article will provide the guidelines to install a Hardie board on the floor. Anyone having trouble installing a Hardie board can get their ideas from here.

What is Hardie Board used for?

Hardie Board on Floor
Hardie Board Floor

This board is specialized to use on walls, floors, and countertops. People install a Hardie board or cement backer to make their base stronger than it originally is. Hardie Board makes the floor more long-lasting more durable.

This does not leave any chance of rotting the floor and reduces the chance of underlying wall hoops or floor spars falling off quickly or decaying.

The installation of the Hardie Board can make the project work fast. And it gives a satisfying look after finishing. The ingredients used in a Hardie board help make its strength increase.

How to Install Hardie Board on Floor?

Hardie Board is a cement floor that is usually placed on a wooden floor. The board can be of 1/3 -1/4 thickness. The extra thickness brings durability and ensures strength. There are two sides to the Hardie Cement board. Smooth side and the rough side.

There is no specific mention of which side of the floor should be placed up and which side down. But the most recommended advice, according to Hardie board installation, is that the smooth side with the nailing pattern of 8″ on midpoint should be on the up.

However, placing it the opposite way is also acceptable. Hardie board is usually set up beneath or over Vinyl Composition Tile (VCT). The installation of a Hardie board is not expensive, and does not even require high maintenance.

Floor Installation:

The steps for installing Hardie Board on the floor are:

  • Ensure a Hardie board, which has ¼ thickness
  • Check the structure of the subfloor
  • Fix if there is any damage on the subfloor
  • The surface of the subfloor should be flat and clean
  • Then find Plywood that has 5/8 exterior grade or 23/32 OSB with Exposure 1 in measurement
  • Spar spacing does not exceed more than 24 in the center.
  • Fix arrangement of the Hardie cement board, which shall be installed
  • Reel the Hardie board joints properly
  • Make sure not to make parallel with subfloor joints
  • Make certain that all four corners of boards never get encountered at the same point
  • Maintain a minimum of 1/8 in the gap between the edges of the board
  • Always use specialized nailers for installing hardie board.

Thus, one can easily install a Hardie board by following the given steps.

Is Hardie Board and Cement Board the Same?

Hardie board and cement board can be the same. Hardie Board is just a brand name of cement boards. So, every Hardie board is a cement board, but not every cement board is Hardie Board.

Special Feature of Hardie Board

The Hardie board has a unique feature: the board is waterproof. Hydro Defense Technology makes the board water-resistant.

Most other cement board needs to be customized to make the board waterproof, but in Hardie Board, the feature is already there. So, it eliminates the extra costs and extra hassle of applying a waterproof coating all over the board’s surface.


Hardie Board is one of the cement siding board’s best-known bands. This gives a lot of ideal combinations of strength to the floor installation. The Hardie board on the floor can take a new look to your house. This will also give an incredible first impression to everyone who visits the house for the first time.

This article is made easy for installing Hardie Board on your house’s floor, but you should seek professional help if you still have trouble installing it.

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