ASM Roof-Wall Connection (Head-wall)

Notice to Reader

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 WORK INCLUDED

(1) Deck overlay

Required over some deck surface to provide a solid or continuous substrate for roof system materials. Here, a deck overlay is provided to support a continuous AVB layer.

(2) 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.

(3) Insulation

Installed with offset side and end joints.

(4) Vapour-permeable separation membrane

Installed over insulation and required on all insulated Architectural Sheet Metal Roof Systems. The material must be located between the insulation and metal panels/ventilation material (see 8.1.2 Design).

(5) 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.

(6) Metal Panel Clip

Installed to metal roof panel manufacturer's printed instructions.

(7) Bearing plate

Used to support clips and distribute dead and live loads when direct contact with a solid substrate is not possible.

(8) Architectural metal roof panel

(9) 'Z'-Closure

Set in acceptable sealant and secured with compatible, non-corrosive, flat head fasteners.

(10) Sheet Metal Flashing

Hooked to 'Z'-Closure 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.

(11) Metal Counter Flashing

Must extend behind wall system and wall control layers. Stucco stops are not considered to be a counter flashing.

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2 RELATED WORK BY OTHERS

(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.

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RoofStar Guarantee Standards for Architectural Sheet Metal (ASM) Systems

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