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Big units may also increase transportation expenses from the factory to the site and erection expenses of positioning the units on the structure. Thermally broken unitized systems are readily available, using comparable technology as that utilized in stick curtain wall systems. The service life of even the most durable curtain wall might be shorter than that of durable surrounding wall claddings such as stone or brick masonry.


The life span span of elements that are mated with the drape wall into an assembly must match the life span span of the drape wall itself. Need long lasting flashing materials, non-corroding attachment hardware and fasteners, and moisture resistant products in regions subject to moistening. Laboratory testing: For tasks with a significant amount of custom-made curtain wall, require lab screening of a mock-up curtain wall prior to completing task shop drawings.


Define that lab tests are to be performed at an AAMA Accredited Laboratory center. Field Mock-up: For all curtain walls, stock or custom, need building and testing of a field mock-up agent of the wall/window assembly. This is best arranged prior to the release of store illustrations for window production, so that there is an opportunity to make design changes based upon the test efficiency of the field mock-up.




Field screening of curtain walls: Need the field screening of drape walls for air infiltration and water penetration resistance, for quality assurance of curtain wall fabrication and installation. Need several tests with the first test on initial setups and later tests at approximately 35%, 70% and at final conclusion to catch problems early and to validate continued workmanship quality - glazed wall panels.


Shop drawing coordination: Need drape wall setup shop drawings revealing all surrounding building and associated work, consisting of flashings, accessories, interior finishes, and indicating sequencing of the work. Curtain wall systems, particularly unitized systems, need competence on the part of the building designer, the producer, the producer, and the installer. For all however the most basic of systems, the designer needs to think about engaging an outside consultant, if such know-how is not offered on the personnel.

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The information related to this area of the BEDG on the WBDG were established by committee and are meant exclusively as a means to highlight basic design and construction principles only. Suitable use and application of the concepts illustrated in these information will differ based upon performance considerations and environmental conditions special to each project and, therefore, do not represent the final opinion or recommendation of the author of each area or the committee members responsible for the advancement of the WBDG.




Elevation includes splice joints to accommodate thermal motion of the curtain wall frame. A through-wall metal flashing at the base of the brick cladding above the drape wall protects the curtain wall from leak through the wall above (see Exterior Wall) for combination of the these parts. Locate exterior boundary sealant joints behind trim cover to prevent water inside trim cover from bypassing the exterior sealant joint.


Constant metal sill flashing at the base of the drape wall protects the wall framing below from leak through the curtain wall. Sill flashing need to have upturned end dams and completely sealed corners (large glazing panels). Intermediate horizontal needs to be wept to the outside and avoid water from draining onto the head of the glazing system below.




Find setting blocks regarding not obstruct water drainage from the glazing pocket. Offer anti-walk blocks at the jambs of the glazing systems. Blocks should be gapped 1/8-inch from the edge of the glazing system. Keep in mind: the following U-series details are thanks to The Facade Group This elevation reveals a common unitized drape wall assembly hung from the edge of the floor slab.


The system revealed is composed of vision glazing and a glazed spandrel shadow box with an insulated back pan. A constant vertical gasket provides the main weather condition seal at the pressure equalized rainscreen zone of the assembly. Foam glazing tape weather condition seal is discontinuous at horizontal panel joints to accomplish pressure equalization between weather condition and air seals at vertical system joints.

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The units are gotten in touch with a field applied splice sleeve which contains an index clip to line up the next unit above the joint horizontally as it is being set. Glazing pocket weeps are secured from wind-driven rain and pressure by a glazing trim cover including weep slots in the bottom which are offset from the sill glazing pocket weep slots and the glazing setting obstructs at glazing panel quarter points.


Gasket height must correspond to the curtain wall design pressure. large double glazed glass panels. Outside cover splice sleeves are set up at the face of the stack joint during unit field setup. Systems are developed and set up with horizontal and vertical clearance spaces to permit for differential motion and accommodate building and construction tolerances. Pressure equalized rainscreen gaskets form a primary weather seal at the face of the unitized vertical stack joint in line with the horizontal rainscreen gasket at the unit sill listed below.




Spandrel glass adapters are used to decrease the depth of the glazing pocket to accommodate minimized profile of spandrel glass. Spandrel glass adapters ought to be fully bedded in sealant and incorporated with glazing pocket glazed window panels corner seals to prevent water leak from glazing pocket to building interior. Unit measurement of mating head and sill extruded profiles enables specified floor to flooring deflection at the stack joint.