Page 469 - Construction Waterproofing Handbook

ENVELOPE TESTING 12.9

FIGURE 12.8 Structural supports for curtain wall facade.
(Courtesy of Architectural Testing, Inc.)

Situations that arise during testing make it extremely important that mechanics
installing a curtain wall at the job site be the same mechanics who install the mock-up con-
struction for testing. Then, should problems arise in testing, they can be resolved with the
knowledge carried to the job site. In the same manner it is important that a contractor
supervisor be present and participate in mock-up construction and testing, to ensure con-
tinuity and quality of envelope job-site construction.
Mock-ups, in effect, become a partnering or teaming concept, with all partners—archi-
tect, owner, contractor, and subcontractor—involved. These partners work together to
complete mock-up testing successfully and resolve any conflicts or problems before they
occur at the job site.
One serious flaw that frequently occurs should not be allowed—using sealant materials
to dam up leaks as they occur during testing. Often, discovered leakage is taken care of
simply by applying sealant. This happens in areas such as perimeters of windows, joints in
metal framing, and transition details. Allowing sealant application during testing goes
directly against the actual purpose of testing.