Soundproofing is often a consideration that falls by the wayside in planning construction. However, a soundproof home is a more comfortable one, since it shields its occupants from the distractions of the outside world. Soundproofing is also an indication of high quality construction and effective insulation.
One of the best ways to insulate -- and soundproof -- a house is with foam insulation. Spray foam insulation isn't just an excellent insulator against thermal transfer; It also blocks the transfer of sound. When spray foam insulation is specified as part of planning construction, it gets applied in a way that fills the holes between beams and joists. This blocks sound conduction, and also helps to reinforce the structural members of the home, preventing them from vibrating and transmitting sound.
As a sound insulator, polyurethane is particularly effective because of the sounds that it blocks. It absorbs the midrange frequencies that are present in sound and in human speech. This can make it as useful as an inside insulator as it is in blocking outside noise.
When construction planning with foam insulation, you have a decision to make. Open cell insulation is the most effective soundproofing agent. However, it is not waterproof and may require moisture barriers -- even on indoor walls. For exterior walls, closed-cell insulation provides much better than adequate soundproofing with a very high degree of water resistance. It can also strengthen outside-facing walls.
Contact us at NCFI to learn more about how polyurethane insulation can help soundproof your next home construction project.