/ Blog / Electric Floor Heating Installation

The Best Under Laminate Floor Insulation

Written by Melisa.Warmup on October 23rd, 2023 | Electric Floor Heating Installation | Electric Underfloor Heating | Renovation
The Best Under Laminate Floor Insulation

Laminate flooring is a cost-effective, durable, and aesthetically pleasing alternative for modern homes. However, without the right insulation beneath it, homeowners may face issues like uneven temperatures, moisture accumulation, and insufficient soundproofing. This article provides a comprehensive guide for selecting the best under laminate floor insulation, by shedding light on its benefits, common mistakes to avoid, and the best materials to use.

Under Laminate Floor Insulation

Understanding Under Laminate Floor Insulation

Under laminate floor insulation is a crucial component of any laminate flooring project. It’s a layer placed beneath the laminate during installation. The insulation layer has multiple functions – it evens out subfloor imperfections, provides soundproofing, and improves thermal efficiency. It acts as a barrier that helps to prevent cold air from seeping up, and to help retain warmth for potentially reduced heating bills. High-quality insulation enhances the lifespan and performance of laminate floors.

Types of Under Wood Laminate Insulation Materials

Fiberglass Batts

Fiberglass batts are a popular insulation material due to their affordability and good insulating capabilities. Composed of tiny glass fibers, they effectively trap heat and reduce heat loss from your home. However, their thickness and rigidity can pose challenges for under laminate floor installations. While fiberglass batts work well for insulation in general, they are not recommended for use under laminate flooring.

Foam Board Insulation

Foam board insulation is a better choice for under laminate floor insulation. It’s thinner and more compact than fiberglass batts, which makes it an acceptable option for laminate flooring. The sleek design allows it to lie flat, in order to avoid any issues with unevenness. It offers high thermal resistance with less thickness than fiberglass batts, to help maintain a comfortable temperature in your home. Plus, it dampens sound for a quieter living environment.

Reflective Foil Insulation

Reflective foil insulation, also known as radiant barrier insulation, is another option for under laminate floors. It consists of a thin layer of reflective material, typically aluminum, that effectively reflects radiant heat. This makes it perfect for hot climates, by providing a powerful barrier against heat absorption to keep your home cooler. Reflective foil insulation is slim, easy to install, and suitable for tight spaces where bulkier materials won’t fit.

Factors to Consider Before Choosing Insulation

Climate and Location

The climate and location of your home can significantly affect the choice of under laminate insulation. If you live in a colder region, you would need insulation with high thermal resistance to keep the cold out and retain heat inside, making foam board insulation a suitable choice. In contrast, if you reside in a warmer region where heat gain is a concern, reflective foil insulation that effectively reflects radiant heat would be a more appropriate option.

Subfloor Type

There are typically two main types of subfloors: concrete and wood.


Concrete is a dense, hard material that can create a moisture barrier. However, it can also be cold and hard underfoot. Insulation is especially important with concrete subfloors to provide a buffer against the cold and create a level surface for the laminate.


Plywood and Oriented Strand Board (OSB) are common types of wood subfloors. These types of subfloors are more susceptible to moisture damage. When radiant floor heating is used over plywood or OSB, reflective foil insulation, or something similar is an excellent choice. The reflective material efficiently directs the radiant heat upwards, to help ensure that your floor and room stay warm. It also provides a moisture barrier that protects your subfloor from potential water damage.

ALWAYS check the manufacturer’s instructions and your local building codes before installation. Some radiant heat systems may have specific requirements or restrictions for underfloor insulation.

Moisture Control

Excess moisture can lead to a host of problems, including mold growth, floor warping, and a reduction in the effectiveness of your insulation. Therefore, it’s essential to consider the moisture control capabilities of your chosen insulation material. Regardless of the type of insulation chosen, it’s often wise to install a separate vapor barrier to further protect your laminate flooring from potential moisture damage.

Benefits of Under Laminate Floor Insulation

Energy Efficiency

Insulation acts as a barrier to heat flow, and reduces the amount of energy required to maintain a comfortable temperature in your living space. Whether it’s the biting chills of winter or the scorching heat of summer, quality insulation under your laminate flooring helps to ensure that less warm air escapes your home during the cold months and less cool air during the hot months.

Improved Comfort

Insulation under laminate flooring improves home comfort by buffering against cold drafts, maintaining consistent temperatures, reducing noise transmission, and providing a softer feel underfoot. It creates a more inviting and comfortable living environment.

Noise Reduction

Insulation under laminate flooring is an effective solution for reducing noise transmission in homes. It acts as a sound barrier that absorbs and disperses sound waves, to make daily activities quieter. It also helps block external noise for a more peaceful living environment. Choose the right insulation material to meet your sound reduction needs and enhance thermal efficiency.

Protection Against Moisture and Pests

Insulation under laminate flooring is crucial for protecting your home from moisture and pests. It creates an inhospitable environment for these types of problems, and helps to prevent issues like mold growth and structural damage. Foam board insulation serves as a moisture barrier that keeps groundwater out. It also repels pests with borate-treated materials. By installing insulation, you can improve thermal efficiency, comfort, and add an extra layer of protection against moisture and pests.

Common Mistakes to Avoid with Laminate Floor Insulation

Insufficient Insulation

It’s a common mistake to underestimate the quantity of insulation needed for effective thermal performance under laminate flooring. When the layer of insulation is too thin or not adequately distributed, it may result in uneven temperatures, drafts, and an unsatisfactory energy efficiency level. It’s crucial to calculate the proper amount of insulation for your specific space and to ensure it’s evenly spread across the entire floor area.

Ignoring Moisture Concerns

While some laminate flooring products are waterproof – others are not. Many homeowners make the mistake of ignoring the potential for moisture issues when installing laminate flooring. Uncontrolled moisture can have detrimental effects, such as mold growth, floor warping, and decreased insulation effectiveness. Always consider the moisture control capabilities of your chosen insulation and consider installing an additional vapor barrier where necessary.

Using Incorrect Insulation Materials

Different materials have different insulating capabilities, moisture resistance, and sound dampening properties. Using an insulation that is not suitable for the specific needs of your subfloor can lead to suboptimal performance and potential problems down the line. It’s crucial to research and choose the best thermal insulation to install under your laminate flooring.

Poor Installation Practices

Even the best insulation products can underperform if not properly installed. Poor installation practices, like not sealing gaps, leaving out corners, or failing to secure the insulation correctly, can significantly diminish the insulation’s effectiveness, and lead to energy inefficiency and comfort issues.

Radiant Floor Heating and Laminate Flooring

Having proper insulation under laminate flooring is absolutely essential for the efficient operation of radiant floor heating systems. It plays a vital role in preventing heat from escaping downwards and instead directs it upwards into the room for maximum comfort.

Introducing Warmup 4-in-1 Insulation Board

Introducing Warmup 4-in-1 Insulation Board

Warmup 4-in-1 Insulation Board is the ultimate choice for those seeking top-notch insulation under laminate flooring. This premium product combines four essential functions to maximize efficiency and comfort: thermal insulation, moisture barrier, sound reduction, and underlayment.

Here’s why it’s a standout:

  1. Exceptional Thermal Insulation: With a high R-value, it ensures excellent heat retention to enhance the performance of your underfloor radiant heating system.
  2. Built-in Moisture Barrier: It protects your wooden floor from dampness, and is particularly beneficial for installations over concrete subfloors.
  3. Impressive Sound Reduction: Say goodbye to noisy footsteps! This board significantly minimizes noise transmission to help create a peaceful living environment.
  4. Perfect Underlayment: It provides a smooth and level surface that is essential for achieving a flawless floor finish.

Not only is it lightweight and easy to cut, but it also simplifies the installation process, which makes it a practical choice for DIY enthusiasts and professionals alike.

Find the Best Under Laminate Insulation and Radiant Floor Heating with Warmup

Warmup has a range of under laminate insulation and radiant floor heating solutions to help ensure efficient, high-quality performance for single room retrofits or entire house installations. Our radiant floor heating systems deliver comfortable, energy-efficient heat, while our under laminate insulation products provide thermal efficiency, moisture control, and sound reduction.

Contact us today and speak with one of our experts about your specific project!


Heated Floors

Floor heating is the modern heating solution – creating the perfect temperature, making you feel warm and comfortable from the moment you enter the room.

Warmup Quoting Tools

instant, accurate, flexible

Scroll to Top