What to Put Under Hardwood Flooring

Hardwood floors have the potential to last a very long time, but their longevity depends on what’s underneath. Most people begin with a moisture barrier to protect the wood from spills or humidity that could cause warping. Then, adding plywood or cork underlayment provides extra support, keeps the floor steady, and gives a subtle cushion underfoot. Some people also include soundproofing or thermal insulation to make rooms quieter and more comfortable year-round. Paying careful attention to these layers protects the wood and ensures the quality you expect from local flooring in Centennial, CO, giving your investment the longevity it deserves.


Moisture Barriers

Moisture is one of the biggest threats to hardwood flooring, making the inclusion of a moisture barrier essential. Moisture barriers act as protective shields, preventing water vapor from penetrating the wood, which can lead to swelling, warping, or even mold growth. Commonly, these barriers are made from materials such as plastic or asphalt-impregnated felt paper. Plastic barriers offer total moisture blocking, while felt paper absorbs moisture and repels it. It’s key to install these barriers correctly, sealing all seams tightly and overlapping corners. With the right moisture protection, your hardwood floors will last longer and maintain their beauty.


Underlayment Options

When selecting underlayment for hardwood floors, focus on materials that provide support and help reduce noise. Felt is commonly used as an underlayment because it provides a solid surface that doesn’t contribute to moisture problems that could warp the planks. Cork, another great choice, resists moisture and helps support heavy loads, making it a reliable option for hardwood floors. Plywood, often chosen for its stability, can also help level out minor imperfections in the subfloor. For a lighter, easy-to-install option, foam underlayment made from polyethylene or polystyrene offers excellent cushioning and moisture resistance. Felt underlayment also reduces noise while improving comfort underfoot. Each type of underlayment has its own benefits, so take into account factors like subfloor condition, insulation needs, and budget when making your decision.


Soundproofing Materials

Soundproofing is another key consideration for hardwood flooring installations. If you’re looking to minimize noise transfer between floors, consider adding materials like cork, rubber, or soundproofing mats. Cork underlayment, in addition to its environmental benefits, provides sound absorption and thermal insulation. Rubber underlayment, made from recycled materials, reduces noise transmission while also offering cushioning under the floor. Soundproofing mats, typically composed of dense foam or rubber, are easy to install and can significantly improve sound insulation. By selecting the right materials, you can create a quieter, more comfortable living environment.


Thermal Insulation Choices

Proper thermal insulation beneath hardwood flooring is essential for maintaining an energy-efficient home. Materials like cork and foam boards are excellent at providing insulation while reducing energy costs. Cork offers both thermal insulation and soundproofing, making it an ideal all-in-one solution. Foam boards, such as extruded polystyrene or polyethylene, provide superior insulation and moisture resistance, helping to maintain a consistent temperature throughout the room. When choosing thermal insulation, consider the R-value that best suits your region’s climate to maximize energy efficiency and indoor comfort.


Vapor Retarders

If you’re installing hardwood flooring in areas prone to moisture, such as basements or bathrooms, consider adding a vapor retarder beneath the floor. Vapor barriers prevent moisture from seeping through the subfloor, which can damage the hardwood. By controlling moisture levels, these barriers help to protect the floor from warping, cupping, or buckling. When installing hardwood in humid or fluctuating moisture environments, a vapor retarder is crucial for ensuring the stability and longevity of the floors. Choosing the right vapor barrier material and installing it properly is essential for the durability of your hardwood flooring.


Subfloor Preparation

A successful hardwood floor installation starts with the proper preparation of the subfloor. Before laying down the flooring, ensure that the subfloor is clean, dry, and level. Remove any existing flooring, and inspect the subfloor for any structural issues like loose or uneven spots. Fix any squeaks by securing loose areas, and use a leveling compound if needed to create a smooth surface. It’s also important to check for water damage or rot that could compromise the floor’s stability. Taking the time to properly prepare the subfloor will ensure a smooth installation and improve the overall appearance and longevity of your hardwood floors.



By taking all these elements into account, you’ll create a solid foundation that enhances the durability and performance of your hardwood flooring, ensuring it stands the test of time.


Contact Us

We’re here to assist you with all your flooring and remodeling needs. Whether you’re ready to start your project or just have a question, reaching out is easy:


Visit Us: 16728 East Smoky Hill Road, Unit 10-A, Centennial, CO 80015

Call Us: (303) 993-6479

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  • Monday – Friday: 10:00 AM – 6:00 PM
  • Saturday: 10:00 AM – 3:00 PM
  • Sunday: Closed

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We look forward to helping you transform your space!





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