Meet demanding criteria for high durability and easy maintenance.


Impact Resistance Impact Resistance

Falling Ball Impact Test - Modified ASTM D-1037 Procedure

In certain applications, such as gymnasiums, locker rooms, classrooms, corridors, and institutional settings, acoustical ceiling assemblies may be subjected to impact from objects. Impact resistance assemblies with acoustical lay-in panels typically require retention clips to keep panels in place upon direct impact.


Washability Washability

Washability Test (ASTM D 4828)

For applications where cleanliness is important, panels may require cleaning beyond normal maintenance procedures. Acoustical panels with special surfaces such as DUNE, ULTIMA, OPTIMA, and VPO coatings offer superior wash resistance without compromising panel finish integrity. The accepted test procedure is the Gardner Washability Test ASTM D 4828.


Scrubability Scrubbability

Scrubbability Test (ASTM D 2486)

Ceilings installed in laboratories, clean rooms and food preparation areas are required to meet scrubbability standards - and, sometimes, other specific criteria. The Scrubbability test evaluates a ceiling’s ability to withstand scrubbing.


Soil Resistance Soil Resistance

Simulated Supply Air Diffuser Soiling Test

Dirt accumulation not only detracts from a ceiling’s appearance, but can cost money by requiring painting or replacement of the ceiling. In addition to reducing acoustical efficiency, soiling can cause a substantial reduction in light reflectance. Most Armstrong Hi-LR ceilings provide excellent soil resistance for lasting value and performance.


Scratch Resistance Scratch Resistance

Hess Rake Test

In any areas where lay-in ceiling panels frequently need to be removed for plenum access, surface scratch resistance is highly desirable. The Hess Rake Test evaluated surface scratch resistance.