Silencing the Squeaks and Thuds: The Critical Role of Underlayment for Floating Floors
For homeowners in multi-story residences in Bothell, Woodinville, or Issaquah, one of the most common complaints about laminate or luxury vinyl plank (LVP) is noise. Since these are "floating floors" (not glued or nailed down), they often transmit sound down to the floor below (impact noise) or create a hollow sound within the room (reverberation).
The secret weapon against these noise issues is a high-quality acoustic underlayment. At Eastside Carpets & Floors, we view the underlayment as a critical component of the entire flooring system.
Understanding Underlayment Density vs. Thickness
When selecting an underlayment, there are two primary factors that determine its acoustic performance:
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Thickness (Millimeters): While a thicker material may feel softer, excessive thickness can actually cushion the floor too much, causing the planks to flex and stressing the locking system. For sound control, thickness alone is less important than density.
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Density (Weight/Firmness): Density is key for both sound reduction and stability. A very firm, high-density foam or felt is better at dampening impact noise and provides better support for the plank's locking system than a cheap, soft foam. A dense material helps the floor feel solid underfoot.
Noise Reduction Metrics for Homeowners
To choose the right underlayment, look for products with high ratings in these two categories:
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Impact Insulation Class (IIC): This number measures the underlayment’s ability to prevent the noise of footsteps or dropped items from going to the floor below. A higher IIC number means better performance.
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Sound Transmission Class (STC): This measures how well the underlayment and floor system block airborne sound (voices, music) from going to the floor below.
For the best results, we recommend a laminate-compatible underlayment with both a high IIC rating for impact noise and an integrated moisture barrier for protection, especially when installing over concrete subfloors.
Installing the right underlayment is essential for customer satisfaction, turning a potentially hollow-sounding laminate floor into a quiet, solid, and comfortable surface that homeowners and downstairs neighbors will both appreciate.
Is your floating floor too loud? Let Eastside Carpets & Floors help you choose the right acoustic underlayment for your multi-story home. Our experts understand the balance between noise control, subfloor integrity, and cost. Visit our showroom in Redmond or contact us for a free estimate in Bellevue, Issaquah, or the surrounding area!
