10 Best Acoustic Underlayments 2026 in the United States

The Owens Corning 703 Rigid Fiberglass Board is a set of twelve 1-inch thick, semi-rigid fiberglass panels designed primarily for sound absorption and insulation. With a Noise Reduction Coefficient (NRC) of 0.7, these boards effectively absorb sound, making them suitable for recording studios, home theaters, or any space needing improved noise control. Their 1-inch thickness and fiberglass material contribute to good sound dampening, although they are not specifically rated for Sound Transmission Class (STC) or Impact Insulation Class (IIC), so they may not block sound between rooms as well as some dedicated floor underlayments.

These boards offer a decent R-value of 4.3, which helps with heat resistance to lower energy costs. They are fire rated Class A, adding safety for indoor use. Because they are rigid boards rather than flexible underlayments, they might be less suitable under flooring for impact noise reduction.

Owens Corning 703 boards provide a solid option for improving sound absorption in walls or ceilings and adding insulation, but they might not be the ideal choice if you specifically need an underlayment to reduce floor impact noises or for high sound blocking between rooms.

The Owens Corning 705 High Strength Rigid Fiberglass Board is designed to help with sound absorption and thermal insulation, making it suitable for spaces where reducing noise and heat transfer is important. Its 2-inch thickness provides a good balance between sound control and ease of installation. The fiberglass material is dense and rigid, which supports its strong noise reduction qualities, reflected by its high Noise Reduction Coefficient (NRC) of 1.05, meaning it absorbs a lot of sound effectively.

This product also has a fire safety rating (Class A), which is important if you want safe materials for home studios or professional spaces. It contains over half recycled glass, which is a plus for environmentally conscious buyers. The boards come unfaced (without vapor barrier), so moisture resistance might require additional measures depending on where you install them.

Weighing 32 pounds per pack, these boards are fairly manageable but might need some care during handling and installation. Considering its specifications and price point, this insulation performs well as an acoustic underlayment for general sound absorption and thermal control, especially in DIY or professional studio settings.

The Owens Corning R-30 Fiberglass Batt Insulation is designed primarily as thermal insulation for floors and attics, offering a generous thickness of 10 inches and covering over 500 square feet with the 8-bag set. Its fiberglass material is common for insulation, known for helping reduce airborne sound due to its density and fibrous structure.

As an unfaced batt, it lacks a built-in moisture barrier, so it may not be ideal in damp environments without additional vapor protection. The thickness and density help with sound dampening to some degree, but specialized acoustic underlayments may provide enhanced sound reduction.

If your main goal is thermal insulation with some incidental sound reduction, this product is a reliable and trusted option from a reputable brand. For those focused on reducing sound transmission and floor impact noise, considering materials that offer moisture resistance and specific acoustic performance ratings could be beneficial.