Back Pans
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Description
Bunting Architectural Metals back pans are metal sheets that are attached and sealed to the curtain wall framing around the perimeter behind opaque areas of a curtain wall. In cold climates insulation should be installed between the back pan and the exterior cladding in order to maintain the dew point outboard of the back pan so that the back pan acts as an air and vapor barrier. Back pans provide a second line of defense against water infiltration for areas of the curtain wall that are not visible from the interior and are difficult to access. Water infiltration in opaque areas can continue for extended periods of time causing significant damage before being detected. Back pans also are to be preferred over foil vapor retarders in high performance and humidified buildings as convection currents short-circuiting the insulation can cause condensation, wetting and ultimately failure of these spandrel areas. Back Pans are secured to the curtain wall framing using appropriate fasteners and sealed to the framing by the installer. Back Pans are available mill finish or can be painted if exposed to the interior of the building. Characteristics Material: Galvanized Steel (G90) Material Thickness: 20 or 22 Gauge Standard, Other Thicknesses Available Pan Depth: Up To 6" Deep In Any Increment Face Dimensions: Up to 5' x 10' In Any Increment Oversize Face Dimensions: Up to 5' x 20' Available Paint Finish: If Back Pans are exposed to the interior of the building the exposed side of the back may be painted Note: Thermal performance and air/water proofing details are the responsibility of the project engineer. Bunting Architectural Metals does not control the selection of product configurations, materials, or hardware and assumes no responsibility therefore. |
