Glue-Down Hardwood Floor: Know Some Crucial Things About It

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26.06.2023

Reading Time ~ 10 minutes

Home is all about an overall peaceful atmosphere. Thoughtful wood flooring applications, the placement of ambient lighting, a minimalist yet classy interior, and a vibrant color palette all come together to create a space that makes you feel happy, relaxed, and at ease.

Among all, flooring plays a vital role in creating an overall charming appeal. You can pick hardwood floors as they are known for their durability and longevity, timeless beauty, and can increase the value of your property. For its installation over subfloors, there are several methods used, like nail-down, staple-down, glue-down, and floating installations.

In the nail-down method, hardwood flooring planks are attached to the subfloor using nails or cleats and a nail gun. This method is typically used for solid hardwood floors. The nails or cleats are driven at an angle through the tongue of each plank into the foundation. In the end, each nail usually is completely hidden.

In comparison, the staple-down method involves using a pneumatic stapler to fasten the floor. The floating method involves floor installation over an underlayment rather than attaching it to the subfloor. The boards are bound together via a click-lock mechanism or tongue-and-groove system.

Last but not least, in the glue-down installation, the planks adhere directly to the subfloor using a recommended adhesive. Here is all the difference. This is suitable for both pre-finished solid wood and engineered wood floors. The adhesive creates a strong bond between the material and the subfloor. In this article, we will discuss everything related to gluing down wood flooring.

Glue-down Method: A Brief Introduction

The glue-down hardwood floor method is a technique used to install hardwood planks – they adhere directly to the sub floor using a specialized floor adhesive. Here’s a step-by-step overview of this hardwood floor installation process:

  • Preparation: The subfloor should be clean, dry, and flat. Any existing flooring or debris should be removed, and any necessary repairs or leveling should be done because a proper subfloor is vital to ensure the longevity of the floors.
  • Acclimate the wood: Wood flooring needs to acclimate to the environment where it will be installed. It should be unpacked and allowed to sit in the room for a specified period, usually around 48 hours, to adjust to the temperature and humidity conditions.
  • Moisture barrier: A barrier, such as a vapor retarder, may be required to prevent moisture from seeping into the hardwood. Follow the manufacturer’s instructions to determine if a barrier is needed and, if so, how to install it. Make sure to close all the windows before measuring.
  • Flooring adhesive application: Apply a recommended adhesive to the subfloor using a notched trowel, a specialized adhesive applicator, or other tools. The adhesive should be spread evenly and consistently.

Installing final rows of engineered hardwood

  • Installation: Start installing the boards along a straight reference line, such as the longest wall. Apply pressure to each plank as you lay it down to ensure good adhesion. Use spacers between the boards and the wall so that the wood expands. Repeat this process, working row by row until the entire floor is covered.
  • Trim and cut: Cut the pieces as needed to fit around obstacles, doorways, or the room’s edges. A miter saw or a circular saw can be used for these cuts.
  • Allow for curing: After installation, allow the strong glue to fix according to the manufacturer’s instructions. This typically involves avoiding foot traffic for a specified period and allowing the adhesive to dry and bond properly. Flooring straps can also help.
  • Finishing touches: Once the adhesive has cured, remove the spacers and install the baseboards or molding to cover the expansion gaps at the edges of the room. Finish the floor according to your desired method, such as sanding, staining, and applying a protective finish. After that the work is complete.

It’s important to note that the glue-down method is not suitable for all types of flooring or subfloors. Some engineered hardwood floors are specifically designed for this hardwood flooring installation method, while real hardwood may require other techniques like nail-down or floating installation. Always consult the manufacturer and follow the recommended installation procedures for your specific hardwood flooring product.

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Encountering Glue Down Hardwood Floor Issues?

Undoubtedly, a hardwood floor is a long-term investment, and glue-down installation helps to keep planks in place. Over time, if you’re experiencing glue-down hardwood floor problems, there are several potential causes and solutions you can explore. Here are some common and essential problems and their respective remedies:

  • Buckling or warping: Buckling or warping could occur if the material was not acclimated properly before installation or if the moisture content of the subfloor was too high. Other things that cause the wood floors to buckle include not enough bonding agents, uneven application, and extreme dirt particles beneath the pieces. To fix this, you may need to remove the affected boards, address the damp and moist issue, and reinstall the floor using the correct acclimation procedures and sufficient glue. For this, you need to hire the best installer to get the job done right the first time.
  • Gaps between boards: Gaps between hardwood boards can be a result of improper work, changes in humidity levels, or drying of the material. You can try filling small gaps with wood putty or filler, but larger gaps may require professional intervention to assess the underlying cause and implement suitable remedies.
  • Loose or squeaky boards: If you notice individual boards that are loose or squeaky, it may be due to insufficient adhesive coverage or issues with the subfloor. Reapplying adhesive to secure loose boards or addressing base layer problems can help resolve this issue.
  • Adhesive failure: In some cases, the adhesive used may fail, leading to separation between the hardwood and the subfloor. This can happen due to substandard material quality, improper application, or inadequate curing time. If adhesive failure is the issue, you may need to remove the affected boards, clean off the bonding agent, and reinstall them using a high-quality bonding agent recommended by the manufacturer.
  • Humidity-related issues: These problems can cause various issues with your floors, such as cupping, swelling, or mold growth. Ensure the subfloor is dry and within the acceptable range before installing. If these problems persist, you might need to investigate and address potential sources of humidity.

If you’re undergoing significant problems with your glue-down hardwood flooring, it’s recommended to consult with a professional floor contractor or installer. They can assess the specific problems, provide expert advice, and propose appropriate solutions tailored to your situation.

Final result of installation process

Glue Down or Floating Planks: Which Method is Better for Your House?

Well, there is no specific answer to this question, as the choice between glue-down or floating planks for your house depends on several factors, such as the type of subfloor in your contemporary abode, personal preference, ease of replacement, and the specific requirements of your project. Here’s an overview of both methods to aid you in making an informed decision:

Glue Down Method:

  • Here the planks directly adhere to the subfloor using a strong bonding agent. This method provides a more permanent and stable result. The planks are securely bonded, resulting in reduced movement and a solid feel underfoot.
  • Is typically recommended for concrete plywood or wood subfloor.
  • It can be suitable for high-traffic areas or environments with humidity concerns since the adhesive helps create a strong and durable bond.
  • However, the process can be more time-consuming and labor-intensive. It may also involve the use of potentially strong-smelling adhesives.
  • This method is slightly more cost-effective than the floating floor installation method.

Floating Method:

  • In the floating method, the planks are not directly attached to the subfloor but instead interlock with each other using a tongue-and-groove system.
  • The boards “float” above the subfloor, allowing for some flexibility and movement.
  • This method often involves an underlayment, which provides cushioning, sound insulation, and moisture protection.
  • This type is generally easier and quicker since there is no need for adhesives or extensive subfloor preparation.
  • It can be suitable for various types, including concrete, plywood, and existing flooring (or even wooden subfloor), as long as the surface is clean, dry, and level.

Ultimately, the right method for your house depends on your specific circumstances, preferences, and subfloor condition. It’s recommended to consult with flooring professionals or contractors who can assess your situation and provide tailored recommendations based on your needs.

How thick is glued hardwood flooring?

It is crucial to note that the thickness of glued wood floor can vary, considering the specific product and manufacturer. For example, a common range for the thickness of glue-down wood flooring is between 3/8 inch (9.5 mm) and 5/8 inch (15.9 mm).

One should know that the flooring’s thickness can affect its durability and longevity, as well as its compatibility with the subfloor and overall process. Therefore, it’s recommended to consult the manufacturer and discuss the guidelines for the specific product you’re interested in to determine its exact thickness.

What is the price for glue-down flooring?

The price for a glued-down wood floor can vary depending on numerous factors, like the type and quality of the wooden floor, the brand, the region you’re in, and any additional costs. Generally, a glued-down floor can range from $3 to $10 per square foot.

However, premium or exotic species can be more expensive, and installation costs may vary depending on the complexity of the project and the rates of the professionals you hire. It’s always recommended to get multiple quotes from different professionals to get a better idea of the specific pricing in your area.

Can you glue wooden planks on concrete subfloor?

Yes, it is possible for both engineered and solid wood options. However, there are a few important considerations and steps to follow:

  • Humidity testing: Concrete tends to retain moisture, so it’s crucial to test the water content of the concrete slab before proceeding. Excessive humidity can cause the wood to warp, buckle, or develop mold and mildew. Use a moisture meter to check the levels and make sure they are within the acceptable range for the species you’re using.
  • Concrete preparation: The concrete surface needs to be clean, dry, and free of any debris, dust, or paint. Use a concrete grinder or sander to smooth out any rough areas or imperfections on the surface. If there are any existing coatings or sealants on the concrete, they should be removed or properly prepped before proceeding.
  • Moisture barrier: To further protect the floor from moisture, it’s recommended to install a moisture barrier or vapor retarder over the concrete. This can be a layer of plastic sheeting or an appropriate barrier product specifically designed for this purpose. The barrier helps prevent water from seeping through the concrete and reaching the material.

In addition, it is vital to pick high-quality adhesives that are specifically designed for bonding to concrete and use the right application technique. It’s worth noting that gluing hardwood planks directly to concrete is permanent.

If you prefer a non-permanent option or want to avoid adhesives, you could explore alternative methods such as floating floor installations or using an underlayment system specifically designed for hardwood flooring over concrete.

Brazilian Cherry Wood stained with Duraseal Natural color.

Does glue hold up in the rain, or is it waterproof?

While some types of glue-down wood floors may have humidity-resistant properties to some extent, they are not designed to be fully waterproof. Exposing this wood flooring to rain or excessive moisture can lead to damage, warping, or delamination of the floorboards.

If you are installing wood flooring in an area prone to moisture, such as a bathroom, kitchen, or basement, it is generally recommended to choose a flooring material specifically designed for wet areas. You can consult an expert for help and ask them about the right material to be installed in the particular area of your home.

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Hire Big Bro Hardwood for All Your Work Related to Hardwood Floors

The wood floor installation requires great experience. Our experts at Big Bro Hardwood have honed their skills over the years and delivered services that have delighted clients. Whether you need assistance related to installation, replacement, repair, or sanding, we can bestow the best flooring solutions to transform your home into an elegant place.

In fact, our professionals can advise you on the best techniques and materials and help you make an informed decision. Call (630) 418 4139 to make an appointment and discuss any query you may have.

 

frequently asked questions

Can you install hardwood flooring directly on a plywood subfloor with glue-down method?

Yes, you can glue down engineered hardwood on a plywood subfloor, as it’s stable and suitable for this method. Solid hardwood isn’t recommended for glue-down on plywood due to potential warping. Make sure the subfloor is clean, level, and dry, and use a high-quality adhesive designed for engineered wood.

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