NCIDQ - IDFX (PART 2 OF 2) Exam | Questions
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gypsum wallboard The most common building material used for
constructing interior wall partitions and ceilings;
also called drywall and sheetrock.
⅝" is most common size in commercial
Advantages of gypsum wallboard Low installation cost, quick and easy installation,
fire resistance, sound control capability, easy
availability, versatility, ease of finishing and
decorating, and ease of installation of doors and
other openings
GA-214 Recommended Level of Standardized by Gypsum Association to specify the
Gypsum Board Finish exact requirements for any project based on level
0-5
Level 0 - Gypsum Wallboard Requires no taping, finishing, or accessories
,Level 1 - Gypsum Wallboard joints and interior angles have tape embedded in
joint compound with the surface free of excess
joining compound;
Used for plenum above ceilings and other areas
not normally open to view.
Level 2 - Gypsum Wallboard All joints and interior angles have tape embedded
in joint compound, and one separate coat of
compound is applied over all
joints/angles//fastener heads/accessories
Used where water-resistant backing board is
employed as a substrate for tile/areas where
appearance is not critical.
Level 3 - Gypsum Wallboard Similar to level 2, except 2 coats of joint compound
are used and the surface is free of tool marks and
ridges;
Used when surface will receive heavy-medium
texture finishes OR when heavy-grade wall-
covering to be applied.
, Level 4 - Gypsum Wallboard Similar to level 3, except 3 coats of joint is used
Used where light textures/wallcoverings will be
applied or where the economy is of concern. gloss,
semigloss, and enamel paints NOT recommended
over this level of finish.
Level 5 - Gypsum Wallboard Similar to level 4 except a thin skim coat of joint
compound is applied over the entire surface
Used where gloss, semigloss, enamel, or
nontextured flat paints are specified/where severe
lighting conditions exist.
Typical Gypsum Board Size & size: 4' x 8', 10', 12', 14'
Thickness
Thickness: 1/4" - 5/8" (3/4" and 1" for 2 hr fire ratings)
LC bead Edge trim requiring finishing with joint compound.
It has a back flange, so it must be fitted over the
edge of the wallboard before the wallboard is
fastened to the substrate.
L Bead edge trim without back flange. Install post gyp
install. Finish with joint compound.
and Answers | Verified Solutions | 2026 Edition |
Pass Guaranteed
Save
Terms in this set (206)
gypsum wallboard The most common building material used for
constructing interior wall partitions and ceilings;
also called drywall and sheetrock.
⅝" is most common size in commercial
Advantages of gypsum wallboard Low installation cost, quick and easy installation,
fire resistance, sound control capability, easy
availability, versatility, ease of finishing and
decorating, and ease of installation of doors and
other openings
GA-214 Recommended Level of Standardized by Gypsum Association to specify the
Gypsum Board Finish exact requirements for any project based on level
0-5
Level 0 - Gypsum Wallboard Requires no taping, finishing, or accessories
,Level 1 - Gypsum Wallboard joints and interior angles have tape embedded in
joint compound with the surface free of excess
joining compound;
Used for plenum above ceilings and other areas
not normally open to view.
Level 2 - Gypsum Wallboard All joints and interior angles have tape embedded
in joint compound, and one separate coat of
compound is applied over all
joints/angles//fastener heads/accessories
Used where water-resistant backing board is
employed as a substrate for tile/areas where
appearance is not critical.
Level 3 - Gypsum Wallboard Similar to level 2, except 2 coats of joint compound
are used and the surface is free of tool marks and
ridges;
Used when surface will receive heavy-medium
texture finishes OR when heavy-grade wall-
covering to be applied.
, Level 4 - Gypsum Wallboard Similar to level 3, except 3 coats of joint is used
Used where light textures/wallcoverings will be
applied or where the economy is of concern. gloss,
semigloss, and enamel paints NOT recommended
over this level of finish.
Level 5 - Gypsum Wallboard Similar to level 4 except a thin skim coat of joint
compound is applied over the entire surface
Used where gloss, semigloss, enamel, or
nontextured flat paints are specified/where severe
lighting conditions exist.
Typical Gypsum Board Size & size: 4' x 8', 10', 12', 14'
Thickness
Thickness: 1/4" - 5/8" (3/4" and 1" for 2 hr fire ratings)
LC bead Edge trim requiring finishing with joint compound.
It has a back flange, so it must be fitted over the
edge of the wallboard before the wallboard is
fastened to the substrate.
L Bead edge trim without back flange. Install post gyp
install. Finish with joint compound.
