International Building Code Section 2511


International Building Code 2511.1

General. Plastering gypsum plaster or cement plaster
shall not be less than three coats where applied over metal lath
or wire fabric lath and not less than two coats where applied
over other bases permitted by this chapter.
Exception: Gypsum veneer plaster and cement plaster specifically
designed and approved for one-coat applications.

Installation. Installation of lathing and plaster
materials shall conform with Table 2511.1.1 and Section
2507.

International Building Code 2511.1.1

Installation. Installation of lathing and plaster
materials shall conform with Table 2511.1.1 and Section
2507.

International Building Code 2511.2

Limitations. Plaster shall not be applied directly to
fiber insulation board. Cement plaster shall not be applied
directly to gypsum lath or gypsum plaster except as specified in
Sections 2510.5.1 and 2510.5.2.

International Building Code 2511.3

Grounds. Where installed, grounds shall ensure the
minimum thickness of plaster as set forth in ASTM C 842 and
ASTM C 926. Plaster thickness shall be measured from the
face of lath and other bases.

International Building Code 2511.4

Interior masonry or concrete. Condition of surfaces
shall be as specified in Section 2510.7. Approved specially pre-
504 2006 INTERNATIONAL BUILDING CODE.
GYPSUM BOARD AND PLASTER
pared gypsum plaster designed for application to concrete surfaces
or approved acoustical plaster is permitted. The total
thickness of base coat plaster applied to concrete ceilings shall
be as set forth in ASTM C 842 or ASTM C 926. Should ceiling
surfaces require more than the maximum thickness permitted
in ASTM C 842 or ASTM C 926, metal lath or wire fabric lath
shall be installed on such surfaces before plastering.

International Building Code 2511.5

Wet areas. Showers and public toilet walls shall conform
to Sections 1210.2 and 1210.3. When wood frame walls
and partitions are covered on the interior with cement plaster or
tile of similar material and are subject towater splash, the framing
shall be protected with an approved moisture barrier.