What To Put Under Laminate Flooring In Bathroom

By | October 21, 2023

Essential Aspects of What to Put Under Laminate Flooring in Bathrooms

Installing laminate flooring in bathrooms poses unique challenges compared to other rooms due to the moisture-prone environment. Choosing the right underlayment is crucial to ensure the longevity and performance of your flooring. Here are several key considerations to keep in mind when selecting an underlayment for laminate flooring in bathrooms:

Vapor Barrier

Moisture can seep up from the subfloor in bathrooms, potentially damaging the laminate flooring. A vapor barrier is an essential layer that prevents moisture from reaching the flooring. Choose an underlayment with an integrated vapor barrier or install a separate vapor barrier film between the subfloor and underlayment.

Moisture Resistance

Look for an underlayment designed to resist moisture. Water-resistant materials, such as polyethylene or cork, can withstand spills and humidity without losing their integrity. Avoid using organic materials like felt or rubber, which can absorb moisture and lead to mold or mildew.

Sound Absorption

Laminate flooring can be noisy, especially in bathrooms where water sounds can reverberate. Choose an underlayment with excellent sound absorption qualities to reduce noise transmission. This can provide a more comfortable and quiet environment.


Uneven subfloors can create gaps under laminate flooring, making it susceptible to moisture damage and reducing its stability. An underlayment can help level out minor imperfections in the subfloor, creating a smooth and supportive base for the flooring.

Thermal Insulation

Bathrooms can be cold, especially during winter months. An underlayment with thermal insulation properties can help retain heat, making the floor more comfortable to walk on and reducing energy costs associated with heating the room.


Ensure the underlayment you choose is compatible with your laminate flooring. Some underlayments are designed specifically for laminate flooring and may have specific requirements or restrictions. Always refer to the manufacturer's guidelines for compatibility to avoid any potential issues.

Installation Considerations

Proper installation is essential to maximize the effectiveness of the underlayment. Follow the manufacturer's instructions carefully and ensure the underlayment is laid flat and securely. Overlapping the seams and taping them together can help prevent moisture from penetrating the joints.

Additional Tips

Consider the following additional tips to enhance the performance and longevity of your laminate flooring in bathrooms:

  • Allow the underlayment to acclimate to the bathroom environment for 24-48 hours before installing the laminate flooring.
  • Use a sealant around the edges of the flooring to prevent water from seeping under the planks.
  • Clean up spills and moisture promptly to minimize the risk of damage to the flooring.

Choosing the right underlayment for laminate flooring in bathrooms is essential to ensure the durability, comfort, and longevity of your flooring. By carefully considering these key aspects, you can make an informed decision that meets the unique demands of your bathroom environment.

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