ASM Ridge (Unvented, Insulated)
ASM Ridge (Unvented, Insulated)
Division D - Construction Details
ASM | Ridge (Unvented, Insulated) ( Article 10.3.2.3. and Article 10.3.4.1.)
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ASM Details
1 WORK INCLUDED
- (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.
- (5) Ventilation beneath panels
- 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.
- (9) Ridge cap flashing
- See Article 10.3.4.1. for securement options, depending on roof slope.
- (10) Fasteners
- Face-fastening to the metal panel ribs is permissible only for roofs with a slope greater than 1:1 (12" in 12"). Otherwise, secure the ridge with Z-girts as shown in Construction Detail "ASM Ridge (Unvented, Uninsulated)".
2 RELATED WORK BY OTHERS
- (A) Acceptable Deck
NOTE: See the Standard for additional requirements.
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