Tile Backing Boards (Hydro-Blok)


Specification Details

8.5" x 11"
Word Doc
Usage Limit
Unlimited Projects
09 28 23
Provided By

Path Get Instant access

Download this spec file now.

Download Now

Use this free downloadable 3-part specification template to specify tile backing boards for spaces where walls and ceilings with continuous exposure to water and dampness by Hydro-Blok.

What is it?

Hydro-Blok’s tile backing boards are a highly durable and moisture-resistant solution for spaces that are continuously exposed to water and dampness, such as shower enclosures, bathrooms, and other wet areas.

Made from a high-density extruded polystyrene foam core, which is then coated with a reinforced cementitious layer on both sides. This unique combination of materials provides excellent insulation, waterproofing, and strength, making them ideal for use in demanding wet environments.

Designed to be easy to install and work with. They come in a variety of sizes and thicknesses to accommodate any project, and can be easily cut to size using standard cutting tools. They can be installed directly onto any substrate, including wood, concrete, or drywall, using standard tile setting materials.

Once installed, these tile backing boards provide a solid and stable surface for the application of tile, stone, or other finish materials. Their moisture-resistant properties help prevent water damage and mold growth, ensuring that your tile installation will last for years to come.

Why are they important?

Tiling needs a backer board for several important reasons. First and foremost, a backer board provides a stable, level, and moisture-resistant substrate for tile installation. It acts as a barrier against moisture and prevents any water or moisture from penetrating through the wall or floor into the underlying structure.

Another key benefit of using a backer board is that it helps to prevent cracks in the tile. When tile is installed directly onto a surface that is prone to movement, such as wood or drywall, the tile is more likely to crack over time. A backer board provides a solid and stable surface.  To distribute weight and prevent any movement that could lead to cracking.

Furthermore, using a backer board helps to improve the overall longevity and durability of a tile installation. When installed correctly, they reduce the risk of tiles coming loose or shifting over time. Which can be a costly and time-consuming problem to fix.


Overall, Hydro-Blok’s tile backing boards are an excellent choice for any space that requires a moisture-resistant and durable tile substrate. With their ease of installation and exceptional performance, they are a popular choice among contractors, builders, and DIY enthusiasts alike.

For assistance contact Hydro-Blok by calling (866) 644-1503 or visit their website at www.hydroblok.com.

Related Specifications: 

09 30 43 – Tiling Accessories

Loader Loading...
EAD Logo Taking too long?

Reload Reload document
| Open Open in new tab

Download [32.15 KB]

tile backing boards

Industry Resources
4 specs