When it comes to building or renovating a bathroom, one key component that shouldn’t be overlooked is the subfloor. The subfloor serves as the foundation for the entire bathroom, providing support and stability to the flooring materials. With the wide range of subfloor options available on the market, it can be challenging to choose the best one for your bathroom project. To help you out, we have reviewed ten of the best subfloors for bathrooms available on, taking into consideration factors such as durability, moisture resistance, and installation ease.

1. Schluter Systems DITRA Uncoupling Membrane

The Schluter Systems DITRA Uncoupling Membrane tops our list for its outstanding performance and exceptional moisture resistance. This subfloor effectively uncouples the flooring layer from the underlying substrate, preventing any cracks caused by movement or moisture penetration. It is also easy to install, making it a favorite choice among DIY enthusiasts.

2. QuietWalk Laminate Floor Underlayment

If sound reduction is a concern for your bathroom, then the QuietWalk Laminate Floor Underlayment is an excellent choice. This subfloor not only provides superior moisture protection but also dampens sound, ensuring a more peaceful bathroom experience. Additionally, its vapor barrier properties help to prevent mold and mildew growth.

3. Roberts First Step Premium Underlayment

The Roberts First Step Premium Underlayment is a reliable option for those seeking a subfloor with cushioning properties. This high-density foam underlayment offers comfort underfoot while also providing exceptional moisture resistance. Its unique design allows for easy installation and offers thermal insulation for added energy efficiency.

4. Schluter Kerdi Board Panel

The Schluter Kerdi Board Panel is a top-tier choice for bathroom subfloors due to its exceptional resistance to moisture and mold. This lightweight but strong subfloor option is made of extruded polystyrene foam, making it easy to handle and cut to size. Its waterproofing properties make it perfect to use in wet areas of the bathroom, such as showers.

5. DRIcore Subfloor Membrane Panel

The DRIcore Subfloor Membrane Panel is an innovative subfloor system suitable for bathrooms. It consists of a moisture barrier with an air gap to allow for airflow and vapor diffusion. This design prevents the buildup of mold and mildew, making it an ideal choice for damp environments. The interlocking panels also make installation quick and straightforward.

6. DMX 1-Step Air Gap Underlayment

The DMX 1-Step Air Gap Underlayment is another outstanding subfloor option known for its moisture protection capabilities. This subfloor utilizes a unique dimple design that acts as an air gap, allowing for moisture to be directed away from the flooring. It also offers thermal insulation and sound reduction properties, making it an excellent all-around choice.

7. AMERIQUE Premium 3-In-1 Flooring Underlayment

The AMERIQUE Premium 3-In-1 Flooring Underlayment is a versatile subfloor that works well with various types of flooring, including tile, laminate, and engineered hardwood. With an excellent moisture barrier and sound reduction properties, this underlayment provides a stable and comfortable base for your bathroom flooring. It also offers heat insulation, enhancing energy efficiency.

8. Schluter DITRA-HEAT-DUO Uncoupling Membrane

For those looking to incorporate radiant floor heating in their bathroom, the Schluter DITRA-HEAT-DUO Uncoupling Membrane is an excellent choice. This subfloor combines the benefits of an uncoupling membrane with a heating element, ensuring warmth and preventing cracking. Its moisture-resistant properties make it suitable for wet areas, such as showers and spas.

9. TrafficMASTER Standard 100 sq. ft. Rolls

The TrafficMASTER Standard Rolls subfloor offers an affordable option that doesn’t compromise on quality. Made of high-density polyethylene, this subfloor provides moisture protection while also acting as a vapor barrier. Its lightweight construction and roll format make installation a breeze, making it an attractive choice for DIY projects.

10. Plywood

Last but not least, traditional plywood remains a popular choice for bathroom subfloors. Plywood offers excellent durability when properly sealed and provides a solid and stable base for different flooring materials. However, it’s crucial to ensure proper ventilation and sealing to prevent moisture damage.


Selecting the right subfloor for your bathroom is crucial for a successful and long-lasting renovation or construction project. Each of the subfloors reviewed here offers exceptional qualities to suit different needs and preferences. Whether you prioritize moisture resistance, sound reduction, or ease of installation, there is a subfloor on that can meet your requirements and provide a solid foundation for your bathroom flooring. Make sure to consider your specific needs and consult with professionals before making a final decision.

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