Noise-Rated Systems

Unwanted noise transmission between units is one of the most common complaints in multi-family residential and commercial buildings. Without proper acoustical design, poor sound insulation can lead to tenant dissatisfaction, high vacancy rates, and expensive remediation after construction is complete.

This publication is designed for: architects, designers, builders, contractors

This publication provides practical, test-backed guidance on how to achieve effective noise control using wood structural panel assemblies. It covers the fundamentals of sound measurement and transmission, explains the Sound Transmission Class (STC) and Impact Insulation Class (IIC) rating systems, and presents laboratory-tested wall and floor/ceiling assembly configurations with real performance data.

Key sections include:

• Facts on noise control

• Acoustical laboratory testing

• Laboratory ratings

  • Walls

  • Conventional wood joist floor with resilient finish floor

  • Flooring on sleepers

  • Lightweight and gypsum concrete over conventional wood joist floor

  • Separate ceiling joist

  • Panel/insulation-board sandwich

  • Long span joists

  • Field tests

  • Short form specification

Published by APA — The Engineered Wood Association.