Essential Guide: Roofing Felt Under Hardwood Flooring

Author: Hou

Oct. 04, 2024

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Essential Guide: Roofing Felt Under Hardwood Flooring

  1. What is roofing felt?

    Roofing felt is a type of material commonly used in roofing systems. It typically consists of a fiberglass or polyester mat that is saturated with asphalt to provide a weather-resistant barrier. This material helps protect roofs from water intrusion and serves as an underlayment for shingles. However, it is also used in flooring applications, particularly under hardwood floors.

  2. Why use roofing felt under hardwood flooring?

    Roofing felt acts as a moisture barrier and provides cushioning under the hardwood flooring. By using roofing felt, you protect the wooden boards from moisture that may rise up from the subfloor, which helps to prevent warping and damage. Additionally, it can reduce noise and provide a slight cushioning effect, making the floor more comfortable to walk on.

  3. Can any type of roofing felt be used?

    While most roofing felt types can work, it is recommended to use the heavier grades, typically referred to as #15 or #30 felt. These options are thicker and more durable and offer better moisture protection than lighter varieties. Be sure to select a felt that is specifically designed for flooring applications to ensure optimal performance.

  4. How to install roofing felt under hardwood flooring?

    1. Prepare the subfloor: Ensure that the subfloor is clean, dry, and free from any debris. Repair any damaged areas before installation.

    2. Cut the roofing felt: Measure the area to be covered and cut the felt to size. Overlap the edges by a few inches to ensure complete coverage.

    3. Lay the felt: Position the roofing felt on the subfloor, smoothing it out as you go to avoid wrinkles or bumps.

    Suggested reading:
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    4. Secure the felt: Use staples or adhesive to secure the roofing felt in place, especially at the seams and edges.

    5. Proceed with hardwood flooring installation: Once the roofing felt is installed, you can lay your hardwood floor on top according to the manufacturer’s guidelines.

  5. Are there any drawbacks to using roofing felt?

    One potential drawback is that roofing felt can retain moisture if it is not properly installed. This could lead to mold or mildew issues if the environment is particularly humid. Additionally, some might find that roofing felt does not provide enough cushioning compared to specialized underlayment products. Thus, it's important to weigh the benefits against your specific flooring needs.

  6. Is roofing felt a cost-effective option?

    Roofing felt is generally an affordable choice compared to specialized underlayments. This makes it a popular option for DIY enthusiasts and those working within a budget. However, investing a little more in a quality underlayment specifically designed for hardwood flooring may provide better long-term results.

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