Drywall Evaluation and Testing

NTA provides code compliance testing for the certification of gypsum wallboard. Often called drywall, wallboard, or plasterboard, the gypsum core, provides a natural fire resistance that is often increased with the use of special core additives. NTA offers a single-source solution for all of your needs related to gypsum wallboard testing, inspection, certification, evaluation, and follow-up services. Having all required services performed by a single vendor saves you a significant amount of time and money.

NTA’s accredited test lab and certification program can evaluate every aspect of your gypsum, including for properties suck as:

  • Water resistance
  • Water vapor transmission (Watch ASTM E96 video)
  • Flexural strength
  • Humidified deflection
  • Nail pull resistance
  • Dimensions and tolerances
  • Exterior gypsum soffit
  • Fire resistance
  • Gypsum sheathing
  • Ceiling board
  • Shear strength
  • Product sampling for testing

What NTA can do

NTA is accredited under ISO 17025 to test (Midwest/Southwest), ISO/IEC 17020 to inspect, and ISO/IEC 17065 to certify.

NTA conducts the following tests on gypsum wallboard according to several different methods, including but not limited to:

  • ASTM C36: See ASTM C1396 (Below)
  • ASTM C473: Standard Test Methods for Physical Testing of Gypsum Panel Products
    • These test methods cover the physical testing of gypsum panel products. The test methos appear in the following order: (1) flexural strength (Method A); (2) core, end, and edge hardness (Method A); (3) nail pull resistance (Method A); (4) humidified deflection; (5) end squareness; (6) nominal thickness; (7) recessed- or tapered-edge depth; (8) width; (9) length; (10) water resistance of core-treated water repellant gypsum panel products; and (11) surface water resistance of gypsum panel products with water-repellant surfaces. For use in these test methods, a sample shall consist of gypsum panel products.
  • ASTM C1177: Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing:
    • This standard covers glass mat gypsum substrate, to be used as an exterior material or a sheathing for a weather barrier. The tested materials should consist of a noncombustible water resistant gypsum core, completely embedded in the core or partially surfaced with glass mat. ICC NTA will sample and test to determine whether the material confirms to the standard. The requirements specified will focus on the physical properties such as water resistance, nail pull resistance, flexural strength, humidified deflection, and more. The requirements specified will also focus on dimensional requirements such as width, length, end sqaureness, thickness, and edges.
  • ASTM C1264: Standard Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage of Gypsum Panel Products
    • This specification covers sampling; inspection; rejection; certification; packaging and marking; and shipping, handling, and storage of gypsum panel products. When specified by the purchase agreement, samples of gypsum panel products shall be taken at the place of manufacture or at the destination. At least 0.25 % of the number of gypsum panel products in a shipment, but not less than three gypsum panel products, shall be so selected as to be representative of the shipment and shall constitute a sample for the purpose of tests by the purchaser or user.
  • ASTM C1396: Standard Specification for Gypsum Board
    • This specification covers gypsum boards which include the following: gypsum wallboard for use on walls, ceilings, or partitions and that affords a surface suitable to receive decoration; predecorated gypsum board for use as the finished surfacing for walls, ceilings, or partitions; gypsum backing board, coreboard, and shaftliner board for use as a base in multilayer systems or as a gypsum stud or core in semisolid or solid gypsum board partitions, or in shaft wall assemblies; water-resistant gypsum backing board to be used as a base for the application of ceramic or plastic tile on walls or ceilings; exterior gypsum soffit board for exterior soffits and carport ceilings that are completely protected from contact with liquid water; gypsum sheathing board for use as sheathing on buildings; gypsum base for veneer plaster; gypsum lath for use as a base for gypsum plaster application; and gypsum ceiling board for interior ceilings and walls.
  • ASTM E96: Standard test method for water vapor transmission of materials
    • This specification covers gypsum boards which include the following: gypsum wallboard for use on walls, ceilings, or partitions and that affords a surface suitable to receive decoration; predecorated gypsum board for use as the finished surfacing for walls, ceilings, or partitions; gypsum backing board, coreboard, and shaftliner board for use as a base in multilayer systems or as a gypsum stud or core in semisolid or solid gypsum board partitions, or in shaft wall assemblies; water-resistant gypsum backing board to be used as a base for the application of ceramic or plastic tile on walls or ceilings; exterior gypsum soffit board for exterior soffits and carport ceilings that are completely protected from contact with liquid water; gypsum sheathing board for use as sheathing on buildings; gypsum base for veneer plaster; gypsum lath for use as a base for gypsum plaster application; and gypsum ceiling board for interior ceilings and walls

 

 

Reference:

ASTM C473-19, Standard Test Methods for Physical Testing of Gypsum Panel Products, ASTM International, West Conshohocken, PA, 2019, www.astm.org

ASTM C1177 / C1177M-17, Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing, ASTM International, West Conshohocken, PA, 2017, www.astm.org

ASTM C1264-19, Standard Specification for Sampling, Inspection, Rejection, Certification, Packaging, Marking, Shipping, Handling, and Storage of Gypsum Panel Products, ASTM International, West Conshohocken, PA, 2019, www.astm.org

ASTM C1396 / C1396M-17, Standard Specification for Gypsum Board, ASTM International, West Conshohocken, PA, 2017, www.astm.org


For more information about our gypsum board testing and certification services, contact us.

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