Specifying a seamless acoustical plaster system requires more than NRC ratings. BASWA systems are independently tested to the full set of standards commercial and institutional projects demand — sound absorption (ASTM C423), fire safety (ASTM E84 Class A), mold resistance (ASTM D3273), VOC emissions (CA Section 01350), and light reflectance (ASTM E1477). All tests are performed by certified third-party laboratories and simulate real installed field conditions. Data is available across all BASWA systems, panel thicknesses, and finish types and certified reports are available upon request..
See DownloadsBASWA seamless sound absorbing plaster systems have been tested by independent third party testing agencies. Test Data simulates actual installed field condition details. Coefficient testing is calculated following ASTM C423 Sound Absorption Test guidelines for A and E Mounting.
This graph directly shows the benefit of BASWA acoustical plaster compared to standard drywall. There is 10x absorption of sound.
BASWA Phon can add 5-7 points to STC rated wall or ceiling.
To view all panel data download the summary below.
Class A Fire Rating per the ASTM E84 Standard
Class C Fire Rating per the ASTM E84 Standard
All BASWA Systems scored a 10/10 per ASTM D3273, signifying no growth.
BASWA offers systems ideal for long-lasting performance in high-humidity environments such as natatoriums, locker rooms, and spas.
≤ 0.5 mg/m3 , Passing CA Dept. of Public Health CDPH/EHLB/Standard Method Vers 1.2, 2017
Light Reflectance L-value of 91.3 per ASTM E 1477-98
Light Reflectance L-value of 89.6 per ASTM E 1477-98
Light Reflectance L-value of 90.2 per ASTM E 1477-98
BASWA Phon panels are adhered directly to a stable, continuous substrate. Beveled panel seams are filled with BASWA Fill and the surface is finished with one or two hand-troweled coats of marble aggregate plaster.

BASWA DTG Panels are adhered to drywall grid subassembly per ASTM C645. The surface is finished with two hand-troweled coats of marble aggregate plaster.

BASWA Basic Panels are adhered to a stable, continuous flat substrate. The surface is finished with two hand-troweled coats of marble aggregate plaster.

BASWA Natural panels are adhered to a stable, continuous substrate. Beveled panel seams are filled with BASWA Fill and the surface is finished with one or two hand-troweled coats of marble aggregate plaster.

BASWA Cool requires close coordination between the mechanical and finish trades. The radiant tubing is embedded within the panel system and must be pressure-tested and commissioned prior to the application of finish coats. A stable, continuous substrate is required.
We continuously innovate with ecological improvement in mind to conform to our environmental values. BASWA uses natural and recycled materials, optimized production with heat-recovery, and formaldehyde & solvent-free binders.
As sustainability research continues, BASWA acoustic continues to comply with changing guidelines and regulations; including LEED v5, WELL, and the Living Building Challenge (LBC). HPDs and EPDs are available.
All BASWA acoustic system component testing is performed by certified third party labs. Certified test data reports are available upon request to support your submittal process.
BASWA Phon Panels contain 92% natural and recycled materials, made from recycled glass; only 8% is synthetic materials. Finish materials contain 95% recycled materials, made from aggregate produced during marble stone extraction. The organic binders are formaldehyde & soluble free.
BASWA Systems are VOC free, complying with CA Section 01350. BASWA Finishes offer high light reflectance, with an average light reflectance L Value of 0.91 per ASTM E1477. BASWA Phon System R-values reach 11.66. Cleaning & maintenance of BASWA Systems require no harmful cleaners or chemicals. BASWA acoustic North America offers US Made systems components.
To design buildings that minimize energy use to reduce the environmental damage caused by resource extraction, air pollution, and greenhouse gas emissions and to facilitate the transition to a clean energy future.
BASWA system panels offer a range of high R-values relating to the total panel thickness. BASWA finishes are made with recycled marble sand and are cool to the touch. Marble has a natural ability to maintain a cool temperature due to its thermal properties, and quickly absorbs heat and then releases it slowly, creating a cooling effect.
To eliminate ozone depletion and global warming potential, and support early compliance with the Montreal Protocol, including the Kigali Amendment, while minimizing direct contributions to climate change.
BASWA Cool is a draft-free, noise-free heating and cooling system with excellent sound absorption with embedded, large-scale water-transporting capillary system providing consistent thermal control at a fraction of the energy typically used in a forced air system, and without the negative effects on the ozone typical with air conditioning systems.
Cooling capacity at Δ8K; 79,1 W / m2
Heating capacity at Δ15K; 117,7 W / m2
To reduce concentrations of chemical contaminants that can damage air quality and the environment. To protect human health and the comfort of installers and building occupants.
BASWA systems and system components have been tested for compliance with CA Dept. of Public Health CDPH Standard Method Vers 1.2, 2017. Detailed test data available with results of VOC and TVOC ranges.
To encourage the use of products and materials that have sustainability information available and that have environmentally, economically, and socially preferable impacts in alignment with industry momentum. To reward project teams for selecting products from manufacturers who have disclosed sustainability information about their products and optimized their products across multiple criteria areas.
BASWA utilizes natural plant fibers, recycled glass, post-industrial recycled marble sand, organic binders, and minimal synthetic materials to produce the most sustainable systems available.
Each BASWA system offers unique sustainable solutions. BASWA Phon, BASWA DTG, and BASWA Basic panels are made with recycled glass, reducing landfill waste and the demand for new raw materials. BASWA Natural panels are made exclusively from hemp and flax fibers sustainably cultivated by regional farmers who adhere to strict environmental standards. BASWA finishes are made of post-industrial recycled marble sand that helps form a micro-porous surface that sound can pass through to be absorbed within the system panel.
Drawing on 100% renewable and locally generated electricity from hydropower in the panel production process requires less energy and emits less greenhouse gas. Using only water instead of solvents in our products helps keep harmful VOCs out of the atmosphere.
To reduce construction and demolition waste disposed of in landfills and incineration facilities and pollution to the environment. To reduce the environmental impacts and embodied carbon of manufacturing new materials and products. To delay the need for new landfill facilities that are often located in frontline communities. To create green jobs and materials markets for building construction services.
Typical installation results in less than 3% of panels discarded. Panel scraps may be acceptable in mixed-glass recycling facilities. Plastic buckets containing wet materials are recyclable or reusable. Unused panels and bucket materials can be saved for future projects.
Select products are available in cardboard packaging of our products in cardboard boxes in lieu of plastic buckets, which reduces plastic waste and increases materials per pallet by 50%, and reduces the delivery weight by more than 50%.
To design for increased indoor air quality (IAQ) to better protect the health of building occupants.
BASWA systems and system components have been tested for compliance with CA Dept. of Public Health CDPH Standard Method Vers 1.2, 2017. Detailed test data available with results of VOC and TVOC ranges.
To move beyond neutral or sufficient spaces toward human-centered design that supports customization, enjoyment, and emotional connections between people and the building, thus increasing the likelihood of consistent satisfaction and ongoing stewardship.
BASWA systems interact with many senses. Sound and reverberation allow us to construct our perception of space and to develop an aural connection to others and place.
BASWA systems can be coupled to provide flexible sound absorption between zones while maintaining seamless aesthetics. BASWA systems offer high-performance, with performance values specific to each system and finish, and have been tested by standard installation conditions, A-mount and E-mount per ASTM C423 as well as CAC and STC testing.
BASWA systems can be installed in covered, outdoor areas to mitigate sound transference to indoor spaces.
BASWA finishes are made with recycled marble sand, which offers many benefits in addition to durability and natural aesthetic. Marble has a natural ability to maintain a cool temperature due to its thermal properties, and quickly absorbs heat and then releases it slowly, creating a cooling effect. Additionally, BASWA system panels offer a range of high R-values relating to the total panel thickness.
BASWA finishes also boast a high light reflectance L value of 91.03 per ASTM E 1477-98.
To support the diverse needs of occupants and increase widespread usability of the building to foster an individual and collective sense of belonging.
The connection between improved acoustics and humans underlines the need for access to wellbeing in all spaces and knowledge on the impact of acoustics on everyday health.
BASWA systems interact with many senses. Sound and reverberation allow us to construct perception of space and determine aural connection to others and places. Aural impression is key to delivering acoustic comfort and calm, and can influence one's comprehension of spatial experience.
BASWA systems can be coupled to provide flexible sound absorption between zones while maintaining seamless aesthetics. BASWA systems offer high-performance, specific to each selected system and finish and have been tested by varying installation conditions, A-mount and E-mount per ASTM C423.
Surface dust and dirt can be vacuumed off using a soft brush attachment or blown off using pressurized air. Removal may also be accomplished by applying masking tape to the affected area to lift the dust or dirt without damaging the finish. Learn more.
Accidental stains caused by organic material can typically be removed with the use of BASWA Clean which uses oxidation to penetrate and lift stains and odors from a finished BASWA surface.
Even deep water stains on BASWA finishes can be remediated. BASWA's technical team recommends using BASWA Clean for most water staining, but can assist is finding solutions tailored to the project and issue.
Learn how to properly adjust and re-finish your BASWA products
Learn how to properly adjust and re-finish your BASWA products
BASWA Protect provides a protective, clear, in-depth water repelling impregnation layer developed for BASWA systems that prevents stains and soil before they occur. The deep penetration of BASWA Protect significantly reduces dirt and water absorption without creating a bridging layer to influence the sound absorption properties. BASWA Protect does not form a light reflective layer, color, or gloss on the surface.
Karin von Arb and Markus Häusermann explain the benefits of considering acoustics in their home.
Learn how BASWA Phon Acoustical Plaster Systems are installed, and what you can expect from the finished project.
The BASWA Phon Seamless Sound Absorbing Plaster System is used to reduce reverberation time.
An exploration into acoustics and how function can be balanced with aesthetic appeal to create architecture that provides comfort and well being.
Installed by Manganaro Midatlantic, BASWA Phon Sound Absorbing Plaster was seamlessly integrated into the design to minimize noise levels.
To reduce ozone depletion and support early compliance with the Montreal Protocol while minimizing direct contributions to climate change.
The BASWA Cool System uses an embedded capillary pipe system to provide thermal comfort within a space. Water transporting capillary pipe mats are installed close to the surface, conserving energy while also providing room temperature control without generating airstreams that could negatively affect the ozone.
To achieve increasing levels of energy performance beyond the prerequisite standard to reduce environmental and economic harms associated with excessive energy use.
The BASWA Phon high density mineral wool supporting panels support additional thermal insulation, providing an R-Value of 4.35 per inch of thickness, thus reducing heating and cooling energy use.BASWA Phon provides the following insulating R-Values:30mm BASWA Phon System (1.18”) R-5.1340mm BASWA Phon System (1.57”) R-6.8370mm BASWA Phon System (2.75”) R-11.66
To encourage the use of products and materials for which life-cycle information is available and that have environmentally, economically, and socially preferable life-cycle impacts. To reward project teams for selecting products from manufacturers who have verified improved environmental life-cycle impacts
BASWA Phon suporting panels contain 92% natural and recycled materials, and are made from recycled glass. In addition, BASWA Finish materials contain 95% recycled materials, made from aggregate produced during marble stone extraction. The organic binders used in the product are produced environmentally friendly, and are formaldehyde and solvent free. BASWA acoustic is committed to the use of natural and recycled material, optimized production with heat-recovery, solvent-free binders, and continuous ecological improvements to each product. Detailed information on the components of our panels and finishes have been third party tested and documented.
To encourage the use of products and materials for which life cycle information is available and that have environmentally, economically, and socially preferable life cycle impacts. To reward project teams for selecting products verified to have been extracted or sourced in a responsible manner.
BASWA Phon supporting panels contain 92% natural and recycled materials, and are made from recycled glass. In addition, finish materials contain 95% recycled materials, made from aggregate produced during marble stone extraction
To encourage the use of products and materials for which life-cycle information is available and that have environmentally, economically, and socially preferable life-cycle impacts. To reward project teams for selecting products for which the chemical ingredients in the product are inventoried using an accepted methodology and for selecting products verified to minimize the use and generation of harmful substances. To reward raw material manufacturers who produce products verified to have improved life-cycle impacts.
BASWA acoustic discloses all chemical product ingredients. HPD documentation and third party Life Cycle Assessments have been conducted to verify improved life-cycle impacts, as well as the absence of harmful substances.
To reduce the release of persistent, bioaccumulative, and toxic (PBTs) chemicals associated with the life cycle of building materials.
The BASWA Phon Acoustical Plaster System have been third party HPD documented to confirm the absence of harmful materials including mercury.
To reduce the release of persistent, bioaccumulative, and toxic (PBT) chemicals associated with the life cycle of building materials.
The BASWA Phon Acoustical Plaster System has been third party HPD documented to confirm the absence harmful materials including lead, cadmium, and copper.
To reduce construction and demolition waste disposed of in landfills and incineration facilities by recovering, reusing, and recycling materials.
In a typical installation, less than 3% of panels are discarded due to small leftover pieces. Panel scraps are acceptable in mixed-glass recycling facilities. Plastic pails containing the Pre-Fill, Base and Fine Coats are recyclable as well. Unused panels, Base and Fine Coats are saved for use on a following project.
To reduce concentrations of chemical contaminants that can damage air quality, human health, productivity, and the environment.
The sensitive use of binders in the BASWA Phon mineral wool panels, and binders used to adhere the recycled contents creates an acoustical product that has no harmful volatile organic compound emissions (no VOCs). Additionally, BASWA Phon mineral wool panels compliant with the California Section 01350.
To promote occupants’ productivity, comfort, and well-being by providing quality thermal comfort.
BASWA Phon high density mineral wool supporting panels provide an excellent source of thermal insulation, providing an R-Value of 4.35 per inch of thickness, thus reducing heating and cooling energy use and affording occupants greater thermal comfort in a conditioned space with lower heating and cooling energy use.BASWA Phon provides the following insulating R-Values:30mm system (1.18”) R-5.13
40mm system (1.57”) R-6.83
70mm system (2.75”) R-11.66
To promote occupants’ productivity, comfort, and well-being by providing high-quality lighting.
The high density marble aggregate finish coat is an excellent reflective surface, reflecting interior light sources. In interior occupied spaces, energy use can be dramatically reduced through the coordination of locations of lighting and BASWA Phon, thus reducing overall energy consumption. Average light reflectance L Value of 0.91 per ASTM E1477.
To connect building occupants with the outdoors, reinforce circadian rhythms, and reduce the use of electrical lighting by introducing daylight into the space.
The high density marble aggregate finish coat is an excellent reflective surface, reflecting natural light. In interior occupied spaces, energy use can be dramatically reduced through the coordination of locations of lighting and BASWA Phon, thus reducing overall energy consumption. Average light reflectance L Value of 0.91 per ASTM E1477.
To provide workspaces and classrooms that promote occupants’ well-being, productivity, and communications through effective acoustic design.
The BASWA Systems are available in 3 system thicknesses, 30mm (1.18”), 40mm (1.57”), and 70mm (2.75”); each having different sound absorption characteristics.BASWA Phon Acoustical Plaster System provides the following NRC Ratings:30mm system 0.75-0.80
40mm system 0.85
70mm system 0.85-1.00+ BASWA Phon also provides an additional 5-7 points to an STC rating. The NRC is a single-number index determined in a lab test and used for rating how sound absorptive a material is. This industry standard ranges from zero (perfectly reflective) to 1 (perfectly absorptive). It is simply the average of the mid-frequency sound absorption coefficients (250, 500, 1,000 and 2,000 Hertz). Measurements are made with the BASWA Phon systems applied to ⅝” gypsum board tested following the ASTM 423 Sound Absorption Test guidelines by a third party.
To provide an incentive for the achievement of credits that address geographically specific environmental, social equity, and public health priorities.
BASWA Base and Fine materials are manufactured in Chardon, OH. BASWA Tint is manufactured in Cleveland, OH. BASWA Trims are manufactured in Chicago, IL. The BASWA Phon panel adhesive is manufactured in Gypsum, OH. Extracted and finished materials are transported by truck carrier.
The BASWA Systems have microscopically porous surfaces, that appear to be solid, applied onto a mineral wool panel. High frequency sound energy passes through the pores, into the mineral wool, and is converted into heat energy.
The BASWA Systems have microscopically porous surfaces, that appear to be solid, applied onto a mineral wool panel. High frequency sound energy passes through the pores, into the mineral wool, and is converted into heat energy.
BASWA Systems are applied to a stable sealed substrate. Air does not pass through the product, therefore, only minor surface maintenance may be required. The cleaning and maintenance does not require any hazardous cleaning agents.
Surface dust and dirt can be vacuumed off using a soft brush attachment or blown off using pressurized air. Removal may also be accomplished by applying duct or masking tape to the affected area. This action lifts the dust or dirt from the surface without damaging the finish.
Surface stains are removed by applying BASWA Surface Cleaner, sold by BASWA acoustic. The two part system, solvent and booster, is mixed according to manufacturer’s guidelines and is applied to the affected area. Once applied, BASWA Surface Cleaner has oxidation properties that dissolve organic compounds as well as an anti-bacterial effect that will eliminate any present odors.
Stains that have penetrated the surface and cannot be removed by the previous actions are removed as follows: Apply a 10% solution of hydrogen peroxide to the imbedded stain. This action “bubbles” the stain to the surface where it can be removed by gently patting the surface with a clean soft white towel. This process can only be used on white finished surfaces.
Stains that have penetrated the surface and cannot be removed by the previous actions are removed as follows: Apply a 10% solution of hydrogen peroxide to the imbedded stain. This action “bubbles” the stain to the surface where it can be removed by gently patting the surface with a clean soft white towel. This process can only be used on white finished surfaces.
Stains that have penetrated the surface and cannot be removed by the previous actions are removed as follows: Apply a 10% solution of hydrogen peroxide to the imbedded stain. This action “bubbles” the stain to the surface where it can be removed by gently patting the surface with a clean soft white towel. This process can only be used on white finished surfaces.
Stains that have penetrated the surface and cannot be removed by the previous actions are removed as follows: Apply a 10% solution of hydrogen peroxide to the imbedded stain. This action “bubbles” the stain to the surface where it can be removed by gently patting the surface with a clean soft white towel. This process can only be used on white finished surfaces.
Stains that have penetrated the surface and cannot be removed by the previous actions are removed as follows: Apply a 10% solution of hydrogen peroxide to the imbedded stain. This action “bubbles” the stain to the surface where it can be removed by gently patting the surface with a clean soft white towel. This process can only be used on white finished surfaces.
To provide an incentive for the achievement of credits that address geographically specific environmental, social equity, and public health priorities.