Difference between revisions of "SBS Control Joint (Roof Divider)"

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Difference between revisions of "SBS Control Joint (Roof Divider)"

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| colspan="2"  | <big>'''''RoofStar Guarantee Standards''''' are <span style="color:#6495ed">'''blue-linked'''</span></big>
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<big><big>Division D - Construction Details</big></big>
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<big><big><big><big><big>SBS | Control Joint (Roof Divider) ([[SBS_Roof_Systems_Standard#10.3.2.3._General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]; [[SBS_Roof_Systems_Standard#10.3.4.1._Parapets | Article 10.3.4.1.]])</big></big></big></big></big>
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<div class="panel-heading"><big>'''SBS Details'''</big></div>
 
<div class="panel-heading"><big>'''SBS Details'''</big></div>
 
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[[File:10.3.4.2.jpg|class=img-responsive]]
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[[File:Part 10 - Construction Detail - Control Joint - SBS 1.png | thumb | 700px | link=https://rpm.rcabc.org/images/4/40/Part_10_-_Construction_Detail_-_Control_Joint_-_SBS_1.png | '''Drawing A''']]
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[[File:Part 10 - Construction Detail - Control Joint - SBS 2.png| thumb | 700 px | link=https://rpm.rcabc.org/images/8/89/Part_10_-_Construction_Detail_-_Control_Joint_-_SBS_2.png | '''Drawing B''']]
 
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=== WORK INCLUDED ===
 
=== WORK INCLUDED ===
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;(1) [[SBS Roof Systems Standard#SBSSUBSTRATES|'''Supporting Deck Overlay''']]: If required by design authority.
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;(2) [[SBS Roof Systems Standard#SBSAIRVAPOUR|'''Air or Vapour Control Layers''']]: If required by design authority.
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;(1) [[SBS Roof Systems Standard#PART_10|'''Control Joint (Roof Divider)''']]:  
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;(3) [[SBS Roof Systems Standard#SBSINSULATION|'''Insulation''']]: See available insulation products in the [[Roof Deck Insulation|'''Accepted Materials''']] section of this Manual.
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:Typically framed with dimensional lumber and plywood on site by the ''Contractor'', or by others (as specified).  See [[SBS_Roof_Systems_Standard#10.1.6.2. Control Joints (Roof Dividers) | Article 10.1.6.2.]] concerning permissible design heights for ''control joints''.
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;(4) [[SBS Roof Systems Standard#SBSINSULATIONOVERLAY|'''Insulation Overlay''']]: Where required.
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;(5) [[SBS Roof Systems Standard#SBSBASE|'''Primary Membrane''']] and [[RoofStar Guarantee Standards for SBS Modified Bitumen Roof Assemblies#SBSPROTECTION| '''Membrane Protection''']]
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:Two models are illustrated here.  A ''control joint'' may be as low as 101.6 mm (4”), shown in '''Drawing B''', provided it is not capped with a ''linear metal flashing''.  If a metal cap flashing is specified, the minimum height of the ''control joint'' must be 127 mm (5”), shown in '''Drawing A''', and screw fasteners securing the cap flashing must be kept at least 88.9 mm (3-1/2”) above the ''finished roof system surface''.
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;(6) [[SBS Roof Systems Standard#SBS-STRIPPING|'''Membrane Flashing''']]: Lap over top and mechanically fasten.
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;(2) [[SBS Roof Systems Standard#PART_10|'''Roof membrane''']]:
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;(7) [[SBS Roof Systems Standard#METALCAP-SBS|'''Base Metal Flashing''']]: Mechanically fasten to top of wood blocking. Optional on flexible membrane systems. Required on assemblies using gravel ballast filter mats.
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:Carried up and over the top of the ''control joint'' as stated above. Membrane flashing is required for ''control joints'' when the membrane is “SBS”.
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;(8) [[SBS Roof Systems Standard#METALCAP-SBS|'''Metal Cap Flashing''']]
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;(3) [[SBS Roof Systems Standard#PART_13|'''Metal Cap Flashing''']]:
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:NOTE: (7) and (8) may be one piece.
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:Cap flashing may be employed for protection of the waterproofing, and must be designed and installed as required in [[SBS Roof Systems Standard#PART_13 | Part 13]].
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:Note that the cap flashing is sloped at least 2% (mono slope illustrated) when the width of the flashing exceeds 101.6 mm (4”) (Ref. [[SBS_Roof_Systems_Standard#13.1.3.6. Cap Flashing, Counter-flashing, and Reglet Flashing | Article 13.1.3.6., “Cap Flashing, Counter-flashing, and Reglet Flashing”]]).
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:Fasteners used to secure metal flashing must be at least 88.9 mm (3-1/2”) above the ''finished roof system surface''.
  
 
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=== RELATED WORK BY OTHERS ===
 
=== RELATED WORK BY OTHERS ===
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;(A) [[SBS Roof Systems Standard#SBSDECKS|'''Acceptable Supporting Deck Structure''']]
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;(A) [[SBS Roof Systems Standard#PART_2|'''Acceptable deck''']]
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;(B) [[SBS Roof Systems Standard#SBSCONTROLJOINT|'''Control Joint Assembly''']]: Required to separate new systems from existing roof systems and at dissimilar roof decks or on BUR assemblies over 45 m x 45 m (150&#8217; x 150&#8217;). Primed where applicable. Slope top if wider than 100 mm (4").
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;(C) '''Existing Roof Assembly''': If applicable. Prepared for application of membrane flashing at control joint.
 
 
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'''NOTE''': Refer to '''''RoofStar Guarantee Standards''''' for additional requirements.
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'''NOTE''': See the [[SBS Roof Systems Standard | '''Standard''']] for additional requirements.
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Latest revision as of 19:49, 12 November 2025



Division D - Construction Details

SBS | Control Joint (Roof Divider) ( Article 10.3.2.3.; Article 10.3.4.1.)

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 2.2.1.2.).

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


Drawing A
Drawing B

1 WORK INCLUDED

(1) Control Joint (Roof Divider)
Typically framed with dimensional lumber and plywood on site by the Contractor, or by others (as specified). See Article 10.1.6.2. concerning permissible design heights for control joints.
Two models are illustrated here. A control joint may be as low as 101.6 mm (4”), shown in Drawing B, provided it is not capped with a linear metal flashing. If a metal cap flashing is specified, the minimum height of the control joint must be 127 mm (5”), shown in Drawing A, and screw fasteners securing the cap flashing must be kept at least 88.9 mm (3-1/2”) above the finished roof system surface.
(2) Roof membrane
Carried up and over the top of the control joint as stated above. Membrane flashing is required for control joints when the membrane is “SBS”.
(3) Metal Cap Flashing
Cap flashing may be employed for protection of the waterproofing, and must be designed and installed as required in Part 13.
Note that the cap flashing is sloped at least 2% (mono slope illustrated) when the width of the flashing exceeds 101.6 mm (4”) (Ref. Article 13.1.3.6., “Cap Flashing, Counter-flashing, and Reglet Flashing”).
Fasteners used to secure metal flashing must be at least 88.9 mm (3-1/2”) above the finished roof system surface.

2 RELATED WORK BY OTHERS

(A) Acceptable deck

NOTE: See the Standard for additional requirements.

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