SBS Low Door Opening

Jump to: navigation, search

SBS Low Door Opening

Division D - Construction Details

SBS | Low Door Opening ( Article

Notice to Reader
Images used in a Construction Detail are representative and not prescriptive, and are not necessarily drawn to scale. They are intended to support the related Standard (Ref. Division A, Article

The reader may link to the related Article in the detail title, or link to the Standard as it relates to a specific element in the detail. All hyperlinks are displayed blue text.

SBS Details

SBS Low Door Opening.jpg


(1) Roof system
Conventionally insulated system shown (refer to the membrane Standard for requirements).
(2) Field Membrane
SBS-modified bituminous system shown (see Part 9 for standards)
(3) Self-adhered membrane (pre-flashing)
Apply over rough sill or sill woodwork. Prime as required.
(4) Metal water-stop flashing
Dimensions as specified in design. Mechanically attach to inside face of door sill. Cut flashing to fit opening width.
(5) Membrane flashing
Base membrane shown. Install to overlap and seal in metal water-stop flashing.
(6) Membrane gussets
Install in corners to seal joints.
(7) Metal base flashing (under door)
Optional; protection for membrane when pavers are installed (shown), or when exposed membrane is vulnerable to damage. Mechanical fasteners must be at least 87.5 mm (3-1/2”) above the drainage plane.
(8) Membrane flashing
Applicable for exterior-insulated walls. Seals roof membrane flashing to air/vapour barrier on wall and provides sufficient exposure for positive union with WRB (by others). Mechanically secure membrane (metal base flashing used for securement in this detail).
(9) Metal base flashing (walls)
Optional; protects membrane flashing from damage, and functions as removable panel to permit access to membrane flashing for future replacement.
(10) Pavers and pedestals
May be installed by others, if specified. See Part 14 for material and application requirements. Must be at least 12 mm (1/2”) away from other pavers, and from membrane flashing or metal base flashing, to permit adequate drainage.


(A) Wall and cladding
Generic and representative only.
(B) WRB (Water Resistant Barrier)
Generic and representative only.
(C) Door and jamb assembly
Generic and representative only.

NOTE: See the Standard for additional requirements.

Back to "SBS" Roof System Details


© RCABC 2023
No reproduction of this material, in whole or in part, is lawful without the expressed permission of the RCABC.