ASM Roof-Wall Connection (Head-wall, Vented)

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Images used in a Construction Detail are representative and not intended in their representation of an assembly to be prescriptive. Nor are they necessarily drawn to scale. Rather, they are provided to visually convey the Standards, Guiding Principles and Recommendations of the RoofStar Guarantee Standards for a Waterproofing or Water-shedding System. Actual design with respect to dimensions, the selection of materials and their application remains the responsibility of the Design Authority. The full text of applicable RoofStar Guarantee Standards may be read by using the blue hyperlinks

ASM Details

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(1) Underlayment: Applicable for all Architectural Sheet Metal systems. For slopes less than 1:3, the entire roof slope must be covered with a self-adhered underlayment.
(2) Ventilation material: A ventilation space is required on slopes less than 1:3; entangled mesh (shown) may be used as void fill. The ventilation space facilitates drying as condensation forms on the underside of the metal panels.
(3) Metal Panel Clip: Installed to metal roof panel manufacturer's printed instructions.
(4) Bearing plate: Used to support clips and distribute dead and live loads when direct contact with a solid substrate is not possible.
(5) Architectural metal roof panel
(6) 'Z'-Closure: Set in acceptable sealant and secured with compatible, non-corrosive, flat head fasteners.
(7) Perforated ventilation metal: Mechanically fastened to wall and 'Z'-closure. The outer edge serves as a hook for the roof-wall metal flashing.
(8) Sheet Metal Flashing: Hooked to perforated ventilation metal and fastened to wall with non-corrosive, flat head fasteners 300 mm (12") o/c or preformed foam closures set in acceptable sealant with high domed gasketed cladding type screws at each standing rib.
(9) Metal Counter Flashing: Must extend behind wall system and wall control layers. Stucco stops are not considered to be a counter flashing.

(A) Acceptable deck
(B) Wall control layers: must be positively lapped with roof materials and flashings, to maintain continuity across systems.
(C) Wall cladding

NOTE: Refer to RoofStar Guarantee Standards for additional requirements.