Types

• Acoustic Wall and Ceiling Panels
  Sound-absorbing panels, baffles, and clouds fixed to walls and ceilings to reduce reverberation in rooms.
• Architectural Metal Trim
  Formed metal profiles that protect edges, cover joints, and create reveals at wall, ceiling, floor, and tile transitions.
• Cabinetry and Casework
  Built-in storage and work units, from kitchen and bath cabinets to architectural casework, built frameless or face frame and installed in place.
• Countertops
  Horizontal work surfaces over cabinets and fixtures in stone, engineered quartz, solid surface, laminate, wood, or metal.
• Gypsum Board Ceilings
  Gypsum panel ceilings screwed to joists or a suspended metal grid and finished with tape and joint compound to a smooth continuous plane.
• Interior Millwork
  Milled interior trim and woodwork such as base, casing, crown, wainscot, and paneling in solid wood, finger-jointed wood, or MDF.
• Interior Plaster
  Gypsum, lime, or cement plaster troweled in coats over lath or gypsum base to form a hard, smooth or textured interior wall and ceiling surface.
• Paint and Coatings
  Liquid-applied interior coatings that color and protect walls, ceilings, trim, and metal, specified by type, sheen, and VOC content.
• Suspended Acoustical Ceilings
  Lay-in acoustical panels or tiles carried on an exposed or concealed metal grid hung from the structure above, with a plenum for services.
• Wallcoverings
  Vinyl, textile, and paper-based sheet coverings glued to interior walls, with commercial vinyl graded by weight into Types I, II, and III.

Code reference

Always verify the adopted code edition and local amendments for the project jurisdiction.

Governing editions

Interior finish fire performance

• IBC 2024, Section 803.1.2: wall and ceiling finishes classed by ASTM E84 or UL 723: Class A flame spread index 0 to 25, Class B 26 to 75, Class C 76 to 200, each with smoke-developed index of 450 or less (Paint and Coatings, Wallcoverings, Acoustic Wall and Ceiling Panels, Gypsum Board Ceilings, Suspended Acoustical Ceilings, Interior Millwork)
• IBC 2024, Section 803.1.1: NFPA 286 room corner test is an alternative to the ASTM E84 classes (Wallcoverings, Acoustic Wall and Ceiling Panels, Interior Millwork)
• IBC 2024, Table 803.13: required finish class by occupancy, sprinkler status, and location (exit stairways, corridors, rooms)
• IBC 2024, Sections 803.5 and 803.7: textile and expanded vinyl wall coverings tested as installed with their adhesive and mounting system; Class A and sprinkler protection required under the Section 803.5.2 path (Wallcoverings, Acoustic Wall and Ceiling Panels)
• IBC 2024, Sections 803.11 and 803.12: laminated wood-substrate products and site-applied facings over wood meet NFPA 286 or Class A, B, or C per Table 803.13 (Interior Millwork, Cabinetry and Casework)
• IBC 2024, Section 806.6: trim other than foam plastic at least Class C; combustible trim, excluding handrails and guards, limited to 10 percent of the wall or ceiling area it is applied to (Interior Millwork, Architectural Metal Trim)

Acoustical ceilings

• IBC 2024, Section 808.1.1.1: suspended acoustical ceilings installed per ASTM C635 and ASTM C636 (Suspended Acoustical Ceilings)
• IBC 2024, Section 808.1.1.2: fire-resistance-rated acoustical ceilings installed in the same manner as the tested assembly and per Chapter 7 (Suspended Acoustical Ceilings)

Gypsum board and plaster

• IBC 2024, Section 2506 and Table 2506.2: gypsum panel products and accessories conform to listed ASTM standards, including ASTM C1396 (Gypsum Board Ceilings, Architectural Metal Trim)
• IBC 2024, Section 2508 and Table 2508.1: gypsum board installed per GA-216 or ASTM C840 (Gypsum Board Ceilings)
• IBC 2024, Sections 2510 and 2511: lathing and furring per ASTM C1063 and C926; interior plaster applied per ASTM C842, C843, and C926 (Interior Plaster)

Sound transmission

• IBC 2024, Section 1206.2: STC 50 by ASTM E90, or NNIC 45 field-tested by ASTM E336, for walls and floor-ceiling assemblies between dwelling or sleeping units and public or service areas (Gypsum Board Ceilings, Suspended Acoustical Ceilings, Acoustic Wall and Ceiling Panels)
• IBC 2024, Section 1206.3: impact insulation IIC 50 by ASTM E492, or AIIC 45 field-tested by ASTM E1007, for floor-ceiling assemblies between dwelling or sleeping units

Accessibility

• 2010 ADA Standards, Sections 306.2 and 306.3: toe clearance 9 in. high, 17 to 25 in. deep; knee clearance 9 to 27 in. above the floor, 11 in. minimum depth at 9 in. and 8 in. at 27 in., 30 in. wide minimum (Countertops, Cabinetry and Casework)
• 2010 ADA Standards, Section 902: work and dining surfaces 28 to 34 in. above the floor with a forward-approach clear floor space and knee and toe clearance; 26 to 30 in. for children's use (Countertops, Cabinetry and Casework)
• 2010 ADA Standards, Section 904.4: sales and service counters have a section 36 in. long and 36 in. high maximum (parallel approach), or 30 in. long and 36 in. high maximum with knee and toe space (forward approach) (Countertops, Cabinetry and Casework)
• 2010 ADA Standards, Section 804: residential kitchen work surface 30 in. wide minimum and 34 in. high maximum, or adjustable 29 to 36 in., with removable cabinetry below where clear space is required; clearances 40 in. between opposing elements and 60 in. in U-shaped kitchens; 50 percent of storage space within reach range (Cabinetry and Casework, Countertops)
• 2010 ADA Standards, Section 307.2: objects between 27 and 80 in. above the floor protrude no more than 4 in. into circulation paths (Acoustic Wall and Ceiling Panels, Architectural Metal Trim, Cabinetry and Casework)

Referenced standards

Sources

• UpCodes: 2024 IBC Chapter 8 interior finishes (Department of Defense adoption), https://up.codes/viewer/department-of-defense/ibc-2024/chapter/8/interior-finishes
• UpCodes: 2024 IBC Chapter 12 interior environment (Department of Defense adoption), https://up.codes/viewer/department-of-defense/ibc-2024/chapter/12/interior-environment
• UpCodes: 2024 IBC Chapter 25 gypsum board, gypsum panel products, and plaster (Department of Defense adoption), https://up.codes/viewer/department-of-defense/ibc-2024/chapter/25/gypsum-board-gypsum-panel-products-and-plaster
• Corada: 2010 ADA Standards Section 306, https://www.corada.com/documents/2010ADAStandards/306
• Corada: 2010 ADA Standards Section 804, https://www.corada.com/documents/2010ADAStandards/804
• Corada: 2010 ADA Standards Section 902, https://www.corada.com/documents/2010ADAStandards/902
• Corada: 2010 ADA Standards Section 904, https://www.corada.com/documents/2010ADAStandards/904