Insonobois Sub-Flooring Underlayment 35 in. x 39 ft.

Acoustic sub-flooring underlayment composed of high-density polyethylene with bottom side coated in small recycled rubber granules. For residential and commercial sound-insulation. Insonobois is specially designed for sound-proofing under laminated floor coverings, engineered hardwood, and solid wood. 3.5 mm density for increased comfort. Heat and humidity protection. Recommended for installation above and below floor level on plywood or concrete*.
Acoustic insulation: FIIC-64 / FSTC-59.

*Concrete : allow a curing period of 28 days (drying time and hardening).