Trenwyth / Acousta-Wal


Acousta-Wal® sound-absorbing masonry units are your acoustical and aesthetic solution in one product. Whether it's a school gym, lecture hall or performance arts center, Acousta-Wal is your indoor/outdoor solution to sound absorption and control. Its unique design controls sound transmission as it absorbs sound waves. Acousta-Wal absorbs sound at all frequencies even the difficult-to-control low frequencies.

Acousta-Wal is ideal for both indoor and outdoor sound control.

Acousta-Wal sound-absorbing units are available in a variety of colors and finishes:
  • Astra-Glaze-SW+ / Acousta-Wal glazed masonry units
  • Verastone / Acousta-Wal recycled ground face masonry units
  • Trendstone / Acousta-Wal® ground face masonry units
  • Gray block / Acousta-Wal ground face masonry units

See Astra-Glaze-SW+, Verastone or Trendstone web pages for specific product details.

Sound Wave Absorption: The unique design of Acousta-Wal sound-absorbing units absorbs sound waves. An Acousta-Wal block is a structural concrete masonry unit that has a closed top and vertical slots on its face, exposing the inner cavity. Working much like an automobile muffler, the closed-end cavities of the different size units resonate to sound waves of different frequencies, converting them harmlessly to heat.

Sound Transmission Control: While Acousta-Wal units absorb unwanted noise within an area, they also greatly reduce the transmission of sound to an adjacent area.

Low Frequency Sound Absorption: Acousta-Wal units absorb sounds at all frequencies. However, they are especially effective for absorbing unwanted sounds at low frequencies that are usually difficult to control.

One-Step Installation: Acousta-Wal units provide finished load-bearing or non-load-bearing walls in a single trade, one-step operation. You save time and money.

Low Life-Cycle Costs: Resistant to mechanical damage, Acousta-Wal sound-absorbing units provides sound control for the lifetime of the building.

Mold and Moisture Resistant: Manufactured with an approved water repellent admixture, Acousta-Wal sound-absorbing masonry units repel moisture and prevent mold and efflorescence.

Design Flexibility: Acousta-Wal units offer you freedom of expression in design through a wide variety of colors, shapes and scoring patterns.

Types of Units:

Acousta-Wal Use Type IV units for broad range sound absorption, such as school gymnasiums, lecture halls and performing arts centers. Type IV units have wide funnel-shaped slots, opening into a two-chamber cavity separated by a metal septum laminated to a factory-inserted fiberglass filler. Fiberglass fillers are chemically inert, vermin resistant, incombustible and moisture proof. Type IV units are available in 4″ and 6″ thicknesses.

Acousta-Wal Type IVRF (Reinforced) units offer the advantage of open cavities for vertical reinforcing conduits or pipes. Type IVRV units are available in 8″, 10″ and 12″ thicknesses.

Acousta-Wal Type I units are ideal for absorption of low frequency sound, such as power plants and waste water treatment plants. Type I units have narrow straight slots and empty cavities and are available in 4″ and 6″ thicknesses.

Northfield will be happy to provide a free acoustical analysis for your application. Acoustics vary with such dynamics as room size, tile vs. carpet, drapery vs. window blinds or padded vs. wooden seating. The approach to our analysis depends if you're trying to dampen sound within the room or are trying to block sound from an adjacent area. Call Northfield to request an engineered acoustical study.