ASM Ridge (Unvented, Insulated)

Division D - Construction Details

ASM 10.4.2 Ridge (Unvented, Insulated)

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SBS Details

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(1) Underlayment: The type of underlay required is determined by roof slope.
(2) Ridge girts: May be required by engineer for panel drag load fasteners. Secured using compatible non-corrosive fasteners.
(3) Insulation: Offset and stagger layers 300 mm (12").
(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 layer: 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) Architectural metal roof panel: Top end of panels must be "bread-panned". Clips are not illustrated.
(7) Drag-load fasteners: Compatible non-corrosive fasteners.
(8) Foam closures: may be used to close ridge when cap flashing is mechanically attached to the panels ribs (see 10.3.5.3 (1)(2)).
(9) Ridge cap flashing
(10) Fasteners: See 10.3.5.3 (1)(2).

NOTE: See the Standard for additional requirements.

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