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

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

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<big><big>Division D - Construction Details</big></big>
 
<big><big>Division D - Construction Details</big></big>
 
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<big><big><big><big><big>EPDM | Control Joint (Roof Divider)</big></big></big></big></big>
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<big><big><big><big><big>EPDM | Control Joint (Roof Divider) ([[EPDM_Roof_Systems_Standard#10.3.2.3._General Application Requirements for Perimeters and Walls | Article 10.3.2.3.]]; [[EPDM_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>'''EPDM Details'''</big></div>
 
<div class="panel-heading"><big>'''EPDM Details'''</big></div>
 
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[[File:Part 10 - Construction Detail - Control Joint - EPDM 1.png | thumb | 700px | link=https://rpm.rcabc.org/images/5/52/Part_10_-_Construction_Detail_-_Control_Joint_-_EPDM_1.png | '''Drawing A''']]
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[[File:Illustration Unavailable (Filler Image).png |class=img-responsive | link=https://rpm.rcabc.org/images/6/6a/Illustration_Unavailable_%28Filler_Image%29.png]]
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:Drawing NTS
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[[File:Part 10 - Construction Detail - Control Joint - EPDM 2.png| thumb | 700 px | link=https://rpm.rcabc.org/images/8/86/Part_10_-_Construction_Detail_-_Control_Joint_-_EPDM_2.png | '''Drawing B''']]
 
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=== WORK INCLUDED ===
 
=== WORK INCLUDED ===
  
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;This Page is under construction.
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;(1) [[EPDM Roof Systems Standard#PART_10|'''Control Joint (Roof Divider)''']]:
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:Typically framed with dimensional lumber and plywood on site by the ''Contractor'', or by others (as specified).  See [[EPDM_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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: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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;(2) [[EPDM Roof Systems Standard#PART_10|'''Roof membrane''']]:
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:Carried up and over the top of the ''control joint'' as stated above. Single-ply membranes may be run up and over the ''control joint'' (secured at the base on either side with proprietary securement strips), or the ''control joint'' may be flashed (again, using the ''manufacturer’s'' securement strips).
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;(2a) [[EPDM Roof Systems Standard#PART_10|'''Roof Membrane Securement Strip''']]:
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:Proprietary to a single-ply membrane ''manufacturer'' and installed to secure the field membrane at the base of a ''wall'', ''parapet'', expansion joint, or ''control joint''. Not required for SBS-modified bituminous membrane systems.
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;(3) [[EPDM Roof Systems Standard#PART_13|'''Metal Cap Flashing''']]:
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:Cap flashing must be designed and installed as required in [[EPDM_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. [[EPDM_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) [[EPDM Roof Systems Standard#PART_2|'''Acceptable deck''']]
  
 
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'''NOTE''': See the [[EPDM Roof Systems Standard | '''EPDM Roof Systems Standard''']] for additional requirements.
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'''NOTE''': See the [[EPDM Roof Systems Standard | '''Standard''']] for additional requirements.
  
 
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Latest revision as of 19:40, 12 November 2025



Division D - Construction Details

EPDM | 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.

EPDM 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. Single-ply membranes may be run up and over the control joint (secured at the base on either side with proprietary securement strips), or the control joint may be flashed (again, using the manufacturer’s securement strips).
(2a) Roof Membrane Securement Strip
Proprietary to a single-ply membrane manufacturer and installed to secure the field membrane at the base of a wall, parapet, expansion joint, or control joint. Not required for SBS-modified bituminous membrane systems.
(3) Metal Cap 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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