NYC 9/11 Public Portal Document
130 Cedar Street July 15, 2004
Selective Demolition and Façade Restoration Koenen Associates
2. Flashing shall be placed, generally, at bottoms of cavity wall construction, over all
wall openings, window jambs, at sills of window, and in other locations where
Indicated on the drawings. At bottoms of cavity walls, the flashing shall be built
extending from the exterior face of the brick, up and over onto the back-up as
detailed on drawings. Flashing shall be loosely draped. Extreme care shall be
exercised in placing the masonry materials not to damage the flashing. Flashing
damaged during the masonry erection shall be repaired or replaced by the
Contractor at no additional cost to the Owner. All flashing shall be continuous
around building unless otherwise noted on the drawings. Provide flashing of
sufficient width to allow flashing to protrude 1-1/2" beyond building face. Trim
excess only at time of final brick clean-down.
3. Where flashing Is penetrated by anchors patch flashings at penetration using
adhesive and mastic recommended by the manufacturer to insure watertight seal.
4. Install flashing in accordance with Manufacturer's Instructions, using adhesive,
primer, thinner, cleaner and mastic as recommended by flashing manufacturer.
5. Provide weep holes of type specified in the head joints of the first course of
masonry Immediately on concealed flashing Space twenty-four (16) inches o.c..
3.06 CLEANING. PROTECTION. ADJUSTMENT
A. Clean-up
Upon completion, masonry shall be thoroughly cleaned. If stiff bushes and water
do not suffice, the surface shall be thoroughly wetted with clean water and then
scrubbed with a solution of an approved detergent masonry cleaner, equal to
Sure Klean 600" made by ProSoCo Inc. or approved equal, mixed as per
Manufacturer's directions, followed immediately by a thorough rising with clean
water. All lintels and other corrodible parts shall be thoroughly protected during
cleaning.
2. The Contractor shall take adequate precautions for the protection of all surfaces
against mortar spatter, and shall immediately remove any such spatter hold
should it inadvertently occur, leaving no stain or discoloration.
3. Trim exposed flashing.
B. Protection
1. Excess mortar shall be wiped off the masonry surfaces, as the work progresses.
2. Wood coverings shall be placed over all such masonry surfaces as are likely to
be damaged during the progress of the entire project.
3. Protective measures shall be performed In a manner satisfactory to the Architect.
4. Damaged masonry units shall be replaced to satisfaction of the Architect.
5. Exterior masonry walls shall be draped with waterproof covering until copings are
In place, to prevent water penetration in cavity.
C. Pointing: Point any defective joint with mortar Identical with that specified for that joint
3.07 REPOINTING EXISTING MASONRY
Unit Masonry 04200-9
NYC-WTC 000125166
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