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| SECTION 1807 DAMPPROOFING
AND WATERPROOFING
1807.2 Dampproofing required.
Where hydrostatic pressure will not occur as determined
by Section 1802.2.3, floors and
walls for other than wood foundation systems shall be dampproofed
in accordance with this section. Wood foundation systems shall
be constructed in accordance with AF&PA Technical Report
No. 7.
1807.2.1 Floors. Dampproofing
materials for floors shall be installed between the floor
and the base course required by Section
1807.4.1, except where a separate floor is provided
above a concrete slab. Where installed beneath the slab,
dampproofing shall consist of not less than 6-mil (0.006
inch; 0.152 mm) polyethylene with joints lapped not less
than 6 inches (152 mm), or other approved methods or materials.
Where permitted to be installed on top of the slab, dampproofing
shall consist of mopped-on bitumen, not less than 4-mil
(0.004 inch; 0.102 mm) polyethylene, or other approved methods
or materials. Joints in the membrane shall be lapped and
sealed in accordance with the manufacturer’s installation
instructions.
1807.2.2Walls. Dampproofing
materials for walls shall be installed on the exterior surface
of the wall, and shall extend from the top of the footing
to above ground level. Dampproofing shall consist of a bituminous
material, 3 pounds per square yard (16 N/m2)
of acrylic modified cement, 0.125 inch (3.2 mm) coat of
surface-bonding mortar complying with ASTM C 887, any of
the materials permitted for waterproofing by Section
1807.3.2 or other approved methods or materials.
1807.2.2.1 Surface preparation
of walls. Prior to application of dampproofing materials
on concrete walls, holes and recesses resulting from the
removal of form ties shall be sealed with a bituminous
material or other approved methods or materials. Unit
masonry walls shall be parged on the exterior surface
belowground level with not less than 0.375 inch (9.5 mm)
of portland cement mortar. The parging shall be coved
at the footing.
Exception: Parging of
unit masonry walls is not required where a material is approved
for direct application to the masonry.
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