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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<big><big>Division D - Construction Details</big></big>
 
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{| class="wikitable" | style="color: black; background-color: orange; width: 100%;text-align:center"
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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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| colspan="2"  | <big>'''''Notice to Reader'''''</big>
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| style="color: black; background-color: #ffffcc; width: 100%;text-align:center" | Images used in a Construction Detail are representative and not prescriptive. Nor are they necessarily drawn to scale. Rather, they are provided to visually convey the requirements of the Standard they represent. Unless otherwise required by the Standard, dimensions, the selection of materials and their application remains the responsibility of the ''Design Authority''.<br><br>The full text of the referenced requirements in the [[SBS Roof Systems Standard | '''Standard''']] may be read by using the <span style="color:#6495ed">'''blue hyperlinks'''</span>
 
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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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Use arrows to scroll through related images (A, B, and C). Click any image to expand.
 
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Image:Part 10 - SBS Control Joint (Roof Divider) - A.png | Drawing A
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Image:Part 10 - SBS Control Joint (Roof Divider) - B.png | Drawing B
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Image:Part 10 - SBS Control Joint (Roof Divider) - C.png | Drawing C
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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).  Insulated control joint shown in Drawing (A).  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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;(2) [[SBS Roof Systems Standard#PART_10|'''Base sheet membrane flashing''']]:
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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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:Fully envelope the control joint to ensure water-tightness on all sides.  The base membrane flashing also separates metal cap flashing (when specified) from any organic substrates (plywood, dimensional lumber).
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;(6) [[SBS Roof Systems Standard#SBS-STRIPPING|'''Membrane Flashing''']]: Lap over top and mechanically fasten.
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;(3) [[SBS Roof Systems Standard#PART_10|'''Cap sheet membrane flashing''']]:
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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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:Installed as required in Part 10 and applied as the second or third of a multi-ply membrane system, providing required coverage above the ''finished roof system surface'' (note that the required minimum coverage may be reduced when the joint is fully enveloped with two plies of membrane flashing (see illustration).
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;(8) [[SBS Roof Systems Standard#METALCAP-SBS|'''Metal Cap Flashing''']]
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:NOTE: (7) and (8) may be one piece.
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:When the height of the control joint exceeds 203.2 mm (8”) (Ref. Drawing (A)), no fewer than two plies of sheet membrane flashing shall be carried up at least 203.2 mm above the ''finished roof system surface''.
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;(3) [[SBS Roof Systems Standard#PART_13|'''Metal Cap Flashing''']]:
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:Required only when the low control joint (less than 203.2 mm (8”) in height) is not fully enveloped with at least two plies of sheet membrane flashing.  Cap flashing 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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[[SBS Roof Systems Standard|<i class="fa fa-chevron-circle-left fa" ></i> Back to ''RoofStar Guarantee Standards for SBS Modified Bitumen Roof Assemblies'']]
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[[SBS Roof System Details|<i class="fa fa-chevron-circle-left fa" ></i> Back to ''"SBS" Roof System Details'']]
  
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[[SBS Roof System Details|<i class="fa fa-chevron-circle-left fa" ></i> Back to ''SBS Modified Bitumen Construction Details'']]
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Latest revision as of 22:07, 23 August 2024



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

Use arrows to scroll through related images (A, B, and C). Click any image to expand.

  • Drawing A

  • Drawing B

  • Drawing C

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). Insulated control joint shown in Drawing (A). See Article 10.1.6.2. concerning permissible design heights for control joints.
(2) Base sheet membrane flashing
Fully envelope the control joint to ensure water-tightness on all sides. The base membrane flashing also separates metal cap flashing (when specified) from any organic substrates (plywood, dimensional lumber).
(3) Cap sheet membrane flashing
Installed as required in Part 10 and applied as the second or third of a multi-ply membrane system, providing required coverage above the finished roof system surface (note that the required minimum coverage may be reduced when the joint is fully enveloped with two plies of membrane flashing (see illustration).
When the height of the control joint exceeds 203.2 mm (8”) (Ref. Drawing (A)), no fewer than two plies of sheet membrane flashing shall be carried up at least 203.2 mm above the finished roof system surface.
(3) Metal Cap Flashing
Required only when the low control joint (less than 203.2 mm (8”) in height) is not fully enveloped with at least two plies of sheet membrane flashing. Cap flashing 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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