Can You Put Two Layers of Underlay Under Laminate Flooring?

The recent renovation of my kitchen turned into a bit of a nightmare when I realized I’d seriously underestimated the amount of underlay needed for my new laminate flooring. I ended up with a whole roll left over and, naturally, the question arose: “Can I just double up on the underlay?” It seemed like a good way to ensure a more comfortable and durable floor. But as I dug deeper, I discovered that’s not always the best approach, and there are some critical factors to consider before layering underlay.

Image: www.bestlaminate.com

This experience prompted me to explore the complexities of underlay for laminate flooring, particularly the question of multiple layers. It turns out there’s a lot more to it than meets the eye. This article will delve into the world of laminate underlay, explaining the purpose, benefits, and drawbacks of double layering, and helping you find the right solution for your floor installation.

The Purpose of Underlay

Underlay plays a crucial role in creating a comfortable and functional laminate floor. It sits between the subfloor and the laminate planks, acting as a buffer and enhancing the overall performance of the flooring. Without proper underlay, your laminate floor could be susceptible to a variety of problems, including:

• Unevenness and Squeaking: Underlay can help to smooth out minor imperfections in the subfloor, reducing squeaking and creating a more stable foundation.
• Sound Transmission: Underlay acts as a sound barrier, minimizing foot traffic noise and creating a quieter living environment. This is especially important for upstairs floors or rooms where noise levels need to be controlled.
• Impact Absorption: Underlay cushions the floor, absorbing impacts and reducing stress on the laminate planks. This is crucial for high-traffic areas and can help to extend the life of your floor.
• Moisture Protection: Some underlay materials offer moisture resistance, acting as a barrier between the subfloor and the laminate planks, helping to prevent warping and damage from spills or humidity.

The Advantages and Disadvantages of Using Two Layers of Underlay

Advantages

The primary advantage of using two layers of underlay is achieving superior sound absorption and impact protection. With more cushioning, you can create a quieter, more comfortable floor, particularly if your subfloor is uneven or you live in a multi-story building. This can be especially helpful for rooms where noise reduction is essential, like bedrooms, nurseries, or home offices.

Image: viewfloor.co

Disadvantages

While doubling up on underlay might seem like a good idea, it’s not always practical, and could actually create some problems:

• Increased Thickness: Adding an extra layer of underlay significantly increases the overall thickness of the floor. This can impact door clearances, require adjustments to trim, and sometimes create an awkward transition between different flooring types. It also impacts the final height of your floor, which may need to be considered for areas with appliances or furniture that need to be moved.
• Material Compatibility: Not all underlay materials are compatible with each other. Combining different types of underlay can lead to unexpected results, like inconsistent performance or even a reduction in the overall effectiveness of the underlay system.
• Warranty Voiding: Most laminate flooring manufacturers specify the recommended underlay thickness. Exceeding this thickness may void the warranty on your flooring, as it can put undue stress or strain on the laminate planks.
• Increased Labor Costs: Adding an extra layer of underlay will inevitably add time and cost to your installation process. It may require additional labor, potentially offsetting the savings you might expect from using less expensive underlay.

Types of Underlay Materials

Understanding the different types of underlay materials available is essential when considering whether to use two layers. There is a wide variety of materials, each with its unique characteristics and advantages:

• Foam Underlay: Typically composed of polyethylene foam or polyurethane foam, it’s a budget-friendly option that offers good sound absorption. However, it’s prone to compression and doesn’t provide moisture resistance.
• Cork Underlay: This natural material offers excellent sound insulation and good impact absorption. It’s also a sustainable and eco-friendly option. However, it tends to be more expensive than foam underlay.
• Rubber Underlay: Often made from recycled rubber, this underlay is highly durable and provides good shock absorption. It’s also a great option for areas with heavy foot traffic. However, rubber underlay can be thicker than foam or cork, potentially causing installation complications.
• Combination Underlay: Some underlays combine multiple materials, like foam and cork, to offer a balance of features. They usually provide good sound insulation, impact absorption, and moisture resistance.

Is Two Layers of Underlay Necessary?

Ultimately, the decision to use two layers of underlay depends on several factors, including the type of laminate flooring you’re using, the condition of your subfloor, and your desired level of comfort and noise reduction. If you’re considering double-layering, here are some things to remember:

• Consult the Manufacturer’s Guidelines: Always check the manufacturer’s recommendations for your chosen laminate flooring to ensure you’re not voiding the warranty.
• Evaluate the Subfloor: If your subfloor has minor imperfections or needs additional sound dampening, double-layering could be beneficial. However, if your subfloor is relatively smooth and level, adding an extra layer may be unnecessary.
• Consider the Existing Underlay: If you’re using a high-quality underlay that already provides good sound absorption and impact protection, adding a second layer may not be necessary and could actually create challenges during installation.
• Choose Compatible Materials: If you decide to use two layers of underlay, ensure they are compatible with each other and that the combination will not compromise the performance or durability of your floor.
• Think about Installation: You’ll need to consider the additional labor costs and potential complications associated with double-layering, as well as the impact on the final height of your floor.

Tips for Underlay Selection

Choosing the right underlay is essential for a successful and comfortable laminate flooring installation. Here’s some expert advice:

• Consider the Room’s Usage: For high-traffic areas like kitchens or family rooms, choose an underlay with excellent impact resistance. For bedrooms or quiet spaces, focus on sound absorption.
• Prioritize Moisture Resistance: If your subfloor is prone to moisture issues or you live in a humid climate, opt for a moisture-resistant underlay.
• Pay Attention to Thickness: Choose an underlay that meets the manufacturer’s recommended thickness for your laminate flooring. Exceeding the recommended thickness can create complications and possibly void your warranty.
• Read Reviews and Compare Prices: Research different underlay materials, their benefits, and customer reviews. Compare prices from reputable suppliers to find the best value for your needs.

Selecting the right underlay can make a significant difference in the durability, comfort, and noise reduction of your laminate flooring. By understanding the importance of underlay, the potential advantages and disadvantages of double layering, and the various types of underlay materials available, you can make a well-informed decision that suits your specific needs.

FAQ

Q: Can I use two different types of underlay together?

A: It’s generally not recommended to use two different types of underlay together. Their materials and properties may not be compatible, leading to inconsistent performance or even damage to your laminate flooring.

Q: What is the best way to install two layers of underlay?

A: If you decide to use two layers, make sure the first layer is smooth and flat with no wrinkles or gaps. Then, place the second layer on top, ensuring it’s also flat and even.

Q: How much underlay do I need?

A: The amount of underlay you need depends on the size of the area you’re covering. Most underlay comes in rolls, so measure the total square footage you need and leave about 10% for waste.

Q: What happens if I use too much underlay?

A: Using too much underlay can create problems, like uneven floors, difficulty adjusting door clearances, and increased strain on the laminate flooring itself. It’s important to stick to the manufacturer’s recommended thickness.

Can You Put Two Layers Of Underlay Under Laminate Flooring

Conclusion

While the idea of double layering underlay can be tempting, particularly for those seeking extra comfort or soundproofing, careful consideration is crucial. Balancing the benefits with the potential drawbacks, including the impact on flooring thickness, compatibility issues, and installation complexity, is essential for making the right decision for your home.

Ultimately, the best underlay for your laminate flooring will depend on your specific needs and budget. We encourage you to research the different options available, read reviews, and consult with a flooring expert for personalized advice.

Are you considering using underlay for your laminate flooring project? Share your experience and thoughts in the comments below!