Choosing the Right Thickest Underlayment for Laminate Flooring

The thickest underlayment for laminate flooring typically ranges from 3mm to 8mm, or approximately 1/8 inch to 1/3 inch. However, the most common thicknesses are around 2mm to 5mm. When selecting the right underlayment for your project, several factors must be considered to ensure a successful installation.

Factors to Consider When Choosing Underlayment

Flooring Type: Some laminate flooring manufacturers specify the maximum thickness for underlayment. Always check the manufacturer#39;s guidelines. Sound Reduction: Thicker underlayment can provide better sound absorption, especially useful in multi-story buildings. Moisture Barrier: If you are installing laminate in a moisture-prone area like basements, select an underlayment with a built-in moisture barrier. Subfloor Condition: A thicker underlayment can help even out minor imperfections in an uneven subfloor. Comfort: A thicker underlayment can provide a softer feel underfoot, enhancing the overall comfort of your floor.

Always ensure that the underlayment you choose is compatible with your specific laminate flooring.

Thick Underlayment Standards

Anywhere from 1/4 to 3/8 inch (6mm to 10mm) to 5-8mm is a common thickness range for underlayment. While there is no hard and fast rule, it is essential to use a firm surface that does not yield or squish.

If your subfloor is uneven, using a thick underlayment alone may not solve the problem. Instead, consider using a cementitious screed with self-levelling ability for best results.

Common Concerns and Solutions

Your concerns may be related to soundproofing or a level subfloor. To address these issues:

Soundproofing/Deadening: Use purpose-made fiber boards, available from the store where you bought the laminate. Thicker underlayment, ranging from 6mm to 25mm, can provide the best insulation against generated and transmitted noise from the boards. Uneven Subfloor: If your subfloor is not level, using a thick underlayment is not advisable. Instead, address the unevenness by using a cementitious screed, which can self-level to provide a firm and even surface ideal for laminate flooring.

It is essential to ensure that the laminate rests on a firm surface as any movement in adjoining boards can eventually break the tongue-and-groove fixing. This can result in the need to lift and reinstall the floor, which is not ideal.

Choosing the Right Underlayment

When choosing the right underlayment for your laminate flooring, consider the following points:

Check the manufacturer's guidelines to ensure compatibility with your specific flooring type. Consider the sound reduction benefits of a thicker underlayment. Select a moisture barrier underlayment if you are installing in a moisture-prone area. Address any subfloor imperfections with a firm, level underlayment or a cementitious screed. Ensure that the underlayment is not yielding or squishy to avoid compromising the quality of your installation.

By considering these factors, you can choose the right underlayment for your laminate flooring project, ensuring a successful and comfortable installation.