ASM Membrane Gutter (Insulated Assembly)

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 for continuous support of the underlayment when the deck is not suitable.

(2) Underlayment (lower)

The type of underlay required is determined by roof slope.

(3) Wood blocking

(4) Insulation (lower)

Tapered to support gutter membrane, which is tied into underlayment, to ensure any water intrusion into roof system drains into gutter.

(5) Built-in Gutter Membrane

(6) Underlayment (upper)

(7) Upper insulation

Tapered at lower edge to conform to lower insulation slope. All flat panels must be offset and stagger layers 300 mm (12").

(8) 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)).

(9) Ventilation layer

Recommended over asphaltic underlays and / or as required in this Standard (see 8.1.2 Design).

(10) Bearing plate

Only thermally non-conductive clips or bars passing through the insulation assembly, or mechanically fastened bearing plates, may be used to secure and support insulation panels, or provide support for panel clips.

(11) Architectural metal panel clip

(12) Architectural metal roof panel

Lower, installed prior to the pipe flashing, cut hole large enough to allow for movement. Extend 400 mm (16") upslope beyond the pipe.

(13) Mastic (2-ply SBS) or Sealant (Single plies)

Drain flange must be embedded in a membrane-compatible mastic and secured to the gutter structure.

(14) Drain body

Mechanically secured through flange (for all drain types, see Part 11 DRAINS and PENETRATIONS in the relevant membrane standard in this Manual).

(15) Strainer

(16) Gutter membrane

Refer to the relevant membrane standard for application requirements (SBS, EPD, TPO or PVC).

(17) Parapet cap flashing

Refer to Part 10 PERIMETERS and WALLS in the relevant membrane standard in this Manual.

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2 RELATED WORK BY OTHERS

(A) Acceptable Deck

(B) Built-in Gutter structure. Sloped to drain.

(C) Parapet

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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