Tiffany Haney
Hardiebacker, or fibre cement board, is a popular choice for shower wall substrates. It is a cost-effective and efficient option for remodelling showers. However, there are concerns about its use in constantly wet areas, as the fibre content of Hardiebacker is cellulose-based, and cellulose is an organic material. This means that it may not be suitable for use in shower pans, as it could absorb moisture from the pan. To mitigate this, some people suggest applying a waterproofing membrane, such as Redgard, to the Hardiebacker before installation. Others argue that this step is unnecessary, as the wall-to-floor seam can be fibre-taped, thinset, and redarded to prevent moisture absorption. Ultimately, the decision of whether or not to use Hardiebacker on a slab for a shower pan depends on the specific circumstances and preferences of the installer.
| Characteristics | Values |
|---|---|
| Use case | Hardi backer can be used on a slab for a shower pan |
| Installation | Hardi backer should be installed on the floor under the shower pan to ensure full coverage with no seams |
| Waterproofing | It is recommended to apply a waterproofing membrane to the surface, such as Redgard or MAPEI Mapelastic Aquadefense |
| Materials | Hardi backer is a fiber/cement board with a fiber content of cellulose (15%) |
| Cost | Hardi backer is a popular choice as it bridges the gap between expense and effectiveness |
| Concerns | Some people argue that Hardie should not be embedded in the preslope mud as the fiber can absorb moisture from the pan |
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What You'll Learn
Hardiebacker is a fibre/cement board
Hardiebacker is a fibre cement board that can be used on walls, floors, and countertops. It is a popular choice for a shower wall substrate due to its strength, uniform composition, and performance. The product is made of 90% Portland cement and sand, which resists damage from moisture and provides excellent tile adhesion.
Hardiebacker is a water-resistant backer board that can be used in wet areas, such as bathrooms, kitchens, and laundry rooms. It is also mould-resistant, with MoldBlock® Technology that protects the board from mould damage. The board is easy to install and can be cut to size using a utility knife, carbide tip blade, or a grinder.
When using Hardiebacker as a shower pan, it is important to consider the potential for the fibre in the Hardiebacker to grab moisture from the pan. One solution is to apply a waterproofing membrane, such as Redgard or MAPEI Mapelastic Aquadefense, to the surface of the cement board and down to the pan, without applying it to the pan itself.
Hardiebacker is a preferred brand of cement backer board by tile installers due to its industry-leading strength, composition, and performance. It provides high-performance, water-resistant protection for bathroom and kitchen renovations. The board is light and simple to cut, featuring an exclusive EZ Grid® recessed grid and fastener pattern that makes installation even easier.
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Hardiebacker is preferable to foam panels
Hardiebacker cement boards are a blend of cement and cellulose fibres, designed as a substrate for tile installations. They are highly resistant to moisture, making them ideal for bathrooms, kitchens, and laundry rooms. They are also durable, lasting for decades without deteriorating.
When it comes to installation, Hardiebacker offers a cleaner cut than foam panels, although it does create more dust. It is also heavier than foam panels, making installation more labour-intensive. However, this extra weight means it is stiffer and less likely to flex, which can be advantageous in certain installations.
Hardiebacker is also more versatile when it comes to cutting. While it can be cut with a utility knife, a grinder can be used to speed up the process, although this does create a lot of dust. In contrast, foam panels are very easy to cut with a utility knife, but may not be suitable for larger cuts.
When using Hardiebacker in a shower or wet area, it is important to install a water barrier, such as a vapour-type barrier or a waterproofing membrane. Foam panels, on the other hand, are inherently waterproof, although the seams and fastener penetrations must be waterproofed to create a fully waterproof assembly.
Overall, Hardiebacker is a more durable and stiff option, making it preferable for certain installations where flexing is a concern. Its moisture resistance and versatility in cutting also make it a good choice for wet areas. However, it is more labour-intensive to install due to its weight, and it requires additional waterproofing steps. Foam panels, meanwhile, are lightweight and easy to install, but they may not be as sturdy and require additional accessories for installation.
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Waterproofing is essential
There are several waterproofing methods that can be used. One option is to apply a waterproofing membrane to the cement backerboard. This can be done using a product like Redgard (available at Home Depot) or MAPEI Mapelastic Aquadefense (available at Lowes). Another option is to use a liquid waterproofing product or a Kerdi-type sheet membrane, which can be applied to the surface of the cement board and down to the pan, but not on the pan itself.
It is also important to consider the materials used for the backerboard. Hardiebacker, a type of fiber/cement board, is a popular choice for shower wall substrates due to its balance between expense and effectiveness. However, it is important to note that Hardiebacker contains cellulose, which is an organic material. Constant exposure to moisture can be detrimental to organic materials, so it is important to take the necessary waterproofing precautions when using this type of backerboard.
Additionally, proper installation techniques are crucial for effective waterproofing. This includes using the appropriate fasteners, sealants, banding, valve seals, and pipe seals. For example, when using Hardiebacker, it is recommended to tape and thinset the joints, apply Red Guard to the entire floor, and then set the shower pan on a bed of thinset.
By choosing suitable materials, following correct installation practices, and applying additional waterproofing measures, you can ensure that your shower pan and backer board are adequately waterproofed, protecting your bathroom from potential water damage.
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Hardiebacker installation tools
Hardiebacker, also known as cement backerboard, is a popular choice for a shower wall substrate. It is a cost-effective and efficient material.
Before installing Hardiebacker, you will need to prepare the surface by creating a supporting bed of mortar or modified thinset. This can be done using a trowel, ensuring the mixture is spread evenly. It is important to let the mixture cure for at least 24 hours before proceeding further.
The next step is to cut the Hardiebacker to size. This can be done using a utility knife, carbide tip blade, or a grinder with a diamond wheel for a quicker process, although this method creates a lot of dust, so it is recommended to work outdoors. Remember to wear protective gear, including eye protection and a respirator, when cutting Hardiebacker.
Once the Hardiebacker is cut to size, you can begin the installation process. Start by attaching the Hardiebacker to the wall or floor using alkali-resistant screws specifically designed for this purpose. These screws are crucial as they prevent the breakdown of the material over time. An impact drill or driver can be used to drive the screws in easily. Ensure you follow the recommended screw pattern and maintain the specified distance from board edges and corners.
After the Hardiebacker is securely in place, fill the joints with mortar, and embed the alkali-resistant glass fibre tape in the mortar, levelling it out.
For added protection, you may consider applying a waterproofing membrane, especially if required by local building codes. This can be done by coating the surface with a liquid waterproofing product or using a Kerdi-type sheet membrane.
By following these steps and using the right tools, you can successfully install Hardiebacker for your shower project, ensuring a long-lasting and satisfying result.
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Alternative backerboards
When it comes to alternative backerboards for shower pans, there are several options available. One popular choice is cement backerboards, which include brands like Durock, Fiberboard, Wonderboard, and similar products. These boards are made of cementitious materials, providing more rigidity and better structural integrity for shower walls.
Another option is foam backer boards, which are considered "waterproof" due to their close-celled foam core that prevents water flow. While they do allow some water vapour penetration, they are still effective enough to be considered a waterproofing membrane. Foam backer boards also have the advantage of not requiring an additional waterproofing membrane in some cases, making them a popular choice for both DIY installers and professionals.
If you're looking for a product with an integrated waterproofing membrane, Georgia-Pacific's DensShield is a good option. This water-resistant facing on both sides of the board eliminates the need for a separate layer of plastic behind the tile backer or a sheet membrane over the backer.
Other alternatives to Hardiebacker include Wedi board, Kerdi board, Permabase, and Densshield. These products can be used with traditional mid-pan liners or mud beds with a waterproofing membrane on top.
When selecting a tile backer board, it's important to choose a thick enough size, typically at least 1/2-inch thick, and to always seal it with a roll-on waterproofing membrane to protect the shower stall's underlying structure from water damage.
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Frequently asked questions
Yes, Hardiebacker can be used on a slab for a shower pan. It is a popular choice for shower wall substrates and can be cut to size using a utility knife, carbide tip blade, or a 4" grinder with a diamond wheel.
To install a Hardiebacker slab for a shower pan, first apply a coat of waterproofing membrane to the cement backerboard. Then, cover the shower pan curb with a layer of felt paper and metal lathe, stapling it to the floor. Next, apply thinset on top of the cement board, followed by tiles with grout and sealer.
Hardiebacker is a fibre/cement board with a fibre content of cellulose, which is well-suited for shower pans as it can handle short-term exposure to moisture. It is also a cost-effective option that bridges the gap between expense and effectiveness.
Some alternatives to using Hardiebacker for a shower pan include Durock, Fiberboard, Wonderboard, and foam backer board, which is the best choice for shower walls in terms of performance.
