Can You Use Roofing Felt Under Hardwood Flooring? The Surprising Answer

Picture this: you’re about to embark on a home renovation project, finally getting to swap out that tired old carpet for beautiful hardwood flooring. You’re excited, researching the best techniques and materials, and suddenly, a question pops up: can you use roofing felt under your new hardwood? It’s a question that might sound strange at first, but it’s actually a valid one, especially when you consider the potential for moisture issues and the need for a proper subfloor.

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It turns out, using roofing felt under hardwood flooring is a practice that’s been debated for years. While some DIYers and even experienced contractors swear by its benefits, others strongly advise against it. The truth, as with most things in construction, is more nuanced. To properly understand why roofing felt might be a good or bad idea, we’ll explore the pros and cons, dive into the science behind moisture control, and ultimately help you make an informed decision for your own project.

The Case for Roofing Felt: A Moisture Barrier?

The argument for using roofing felt under hardwood rests on its ability to act as a moisture barrier. Roofing felt, typically made of asphalt-saturated felt paper, is known for its water-resistant properties. This makes it a popular choice for protecting roofs from leaks. The logic behind using it under flooring is that it can potentially prevent moisture from the subfloor from reaching the hardwood, minimizing the risk of warping or rotting.

However, the effectiveness of this is debatable. While roofing felt does offer some level of moisture resistance, it’s not a completely impermeable barrier. It can absorb moisture over time, and its effectiveness can be compromised by punctures or damage, especially under the weight of a hardwood floor. Furthermore, the moisture itself often originates from sources like spills, leaks, or even elevated humidity levels, which roofing felt alone cannot entirely prevent.

The Case Against Roofing Felt: Potential Drawbacks

The drawbacks of using roofing felt under hardwood flooring are more significant. The most significant concern is the risk of trapped moisture. Roofing felt can act as a barrier, blocking moisture from escaping, leading to a damp environment under the flooring. This can create the perfect breeding ground for mold and mildew, potentially causing significant damage and posing health risks.

Another issue is that roofing felt isn’t designed for the demands of hardwood flooring. The felt’s fibrous structure can compress and deteriorate under the weight of the floorboards, creating uneven surfaces and potentially affecting the stability of your flooring. It also poses challenges for installation, making it potentially more difficult to level and secure the flooring.

The issue of ventilation is another important consideration. Roofing felt, unlike proper underlayment, lacks breathability, hindering the airflow and hindering the subfloor’s ability to dry out naturally. This can exacerbate moisture problems and compromise the overall performance of your hardwood flooring.

Modern Alternatives to Roofing Felt

Today, there are much more suitable and effective alternatives to roofing felt for protecting your hardwood flooring. Engineered underlayments, like foam, rubber, or composite materials, offer numerous advantages. They provide a layer of insulation, cushioning, and sound dampening, all while allowing for proper airflow and moisture evaporation. The benefits of these options are often overlooked, but they contribute to a healthier and longer-lasting hardwood floor.

An important point to remember is that choosing the right underlayment often depends on the specific type of hardwood flooring you have. Engineered hardwood, for example, may have different moisture requirements than solid hardwood. Consulting with a flooring specialist can help you select the best underlayment for your unique situation.

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Tips for Choosing the Right Underlayment

When choosing an underlayment for your hardwood flooring, consider these tips:

• Understand the Moisture Risk: Assess the potential for moisture in your space. If you live in a particularly humid climate or have a history of water damage, you’ll need an underlayment with high moisture resistance.
• Look for Underlayment with Moisture Control: When researching underlayment options, consider those with moisture control technology. These underlayments are designed to wick away moisture, preventing it from accumulating under your flooring.
• Prioritize Breathability: Choose an underlayment that allows for airflow, preventing moisture from becoming trapped. This is crucial for maintaining a healthy and dry environment.
• Consider Insulation and Sound Deadening: Some underlayments offer additional insulation and sound dampening features, enhancing the overall comfort and performance of your hardwood floor.
• Consult a Flooring Professional: Don’t hesitate to consult with a flooring specialist. They can help you select the appropriate underlayment based on your flooring type, subfloor condition, and specific needs.

FAQ: Roofing Felt and Hardwood Flooring

Here are some frequently asked questions about roofing felt and hardwood flooring:

Q: Can I use roofing felt under engineered hardwood?

A: It is generally not recommended to use roofing felt under engineered hardwood. Engineered hardwood is less susceptible to moisture damage than solid hardwood, but it is still important to prevent moisture buildup. A moisture-resistant underlayment is a much better choice.

Q: Will roofing felt make my hardwood floor squeak?

A: While roofing felt alone won’t necessarily cause squeaking, it can worsen the problem. The compression and unevenness of the felt under the floorboards can contribute to noise.

Q: Can I use roofing felt on a concrete subfloor?

A: Using roofing felt on a concrete subfloor is not advisable. Concrete is generally considered a stable and moisture-resistant surface. It’s better to utilize a proper underlayment that complements the concrete subfloor.

Q: Can I use roofing felt under vinyl plank flooring?

A: Roofing felt is generally not recommended for use under vinyl plank flooring. Modern vinyl planks are designed to be moisture-resistant, and a proper underlayment will provide better support, insulation, and moisture control.

Can I Use Roofing Felt Under Hardwood Flooring

Conclusion: Roofing Felt is a No-Go for Hardwood Flooring

In conclusion, using roofing felt under hardwood flooring is not recommended. The potential risks of trapped moisture, lack of breathability, and potential for unevenness outweigh any perceived benefits. Modern underlayments offer a superior solution, providing the necessary protection and support while promoting a healthy and comfortable environment for your hardwood floor.

Are you considering hardwood flooring for your home? We’d love to hear your thoughts on this topic. What questions do you have about moisture control and underlayment? Let us know in the comments below!