Difference between revisions of "Asphalt Shingles - Diverter Flashing"

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Difference between revisions of "Asphalt Shingles - Diverter Flashing"

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<big><big>Division D - Construction Details</big></big>
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<big><big><big><big><big>Asphalt Shingles | Diverter Flashing ([[Asphalt_Shingle_Systems_Standard#10.1.4.2. Eave and Rake Edges | Article 10.1.4.2.]])</big></big></big></big></big>
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<div class="panel-heading"><big>'''Asphalt Shingle Details'''</big></div>
 
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<big>Applicable to slopes 1:6 (2" in 12") and greater.</big>
 
  
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=== WORK INCLUDED ===
 
=== WORK INCLUDED ===
;(1) [[RoofStar Guarantee Standards for Asphalt Shingles Roof Assemblies#LSUNDERLAYMENT|'''Underlayment & Eave Protection''']]: One ply of self-adhered modified bituminous underlayment material. Lap 50 mm (2") minimum on sides and 150 mm (6") minimum on ends. Also refer to the [[Eave Protection & Underlayment (Asphalt Shingles, Cedar Shakes & Shingles)|'''Accepted Materials''']] section of this Manual.
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;(1) [[Asphalt Shingle Systems Standard#AShDIVERTER|'''Step 1''']]: Use a standard 225 mm (9”) long step flashing and scribe the fold lines as shown on the illustration. Note that the down-slope upstand is bent at a 110-degree angle to the slope.  No cutting is needed or appropriate; the flashing is formed with folds, bread-pan style.
;(2) '''Edge Metal Flashing''': Optional (cf. [[RoofStar Guarantee Standards for Asphalt Shingles Roof Assemblies#LSEDGE|'''2.2.9 Wood Deck Overlay Sheathing (Non-Structural)''']] for specific requirements), installed to manufacturer's printed instructions.
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;(2) [[Asphalt Shingle Systems Standard#AShDIVERTER|'''Step 2''']]: Fold the bottom end of the flashing as illustrated, so that the bottom upstand aligns with the vertical bread-pan fold made in the next step.
;(3) [[RoofStar Guarantee Standards for Asphalt Shingles Roof Assemblies#LSSTARTER|'''Starter Course''']]: Consists of same type shingles used for roof, applied tabs facing up the slope.
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;(3) [[Asphalt Shingle Systems Standard#AShDIVERTER|'''Step 3''']]: Fold the back flap around and behind the main upstand, bread-pan style.
;(4) '''Strip or Standard Shingles''': Applied as recommended by manufacturer. Laminated shingles are <u>not</u> acceptable for this application.
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;(4) [[Asphalt Shingle Systems Standard#AShDIVERTER|'''Step 4''']]: If required or desirable, cut a capillary notch in the bottom upstand (illustrated), and trim the upstand to suit the aesthetics of the roof.
;(5) '''Compatible Mastic''': Heavy bead of compatible asphaltic mastic at rakes (gables) and valleys.
 
;(6) [[RoofStar Guarantee Standards for Asphalt Shingles Roof Assemblies#ASPROTRUSIONS|'''Protrusions''']]: Curbs and skylights must be flashed with underlayment so as to shed water, with minimum 125mm (5") up vertical surfaces and 150 mm (6") lapping onto field surfaces. Vent stack underlayment flashing should fit tight to the vent pipe and be sealed with compatible mastic. For fire-rated stacks or hot pipe protrusions, strip in secondary metal deck flashing before installing rated stack / pipe flashing.
 
;(7) [[RoofStar Guarantee Standards for Asphalt Shingles Roof Assemblies#ASNAILING|'''Nailing''']]:  Note manufacturer's recommended nailing pattern. Placement varies with manufacturer.
 
  
 
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=== RELATED WORK BY OTHERS ===
 
=== RELATED WORK BY OTHERS ===
;(A) [[RoofStar Guarantee Standards for Asphalt Shingles Roof Assemblies#ASDECK|'''Acceptable Deck''']]
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'''NOTE''': Refer to '''''RoofStar Guarantee Standards''''' for additional requirements.
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'''NOTE''': See the [[Asphalt Shingle Systems Standard | '''Standard''']] for additional requirements.
  
 
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Latest revision as of 14:28, 30 June 2022



Division D - Construction Details


Asphalt Shingles | Diverter Flashing ( Article 10.1.4.2.)

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.

Asphalt Shingle Details
Click on any image to expand it
ASh 10.1.2-1 CD.jpg ASh 10.1.2-2 CD.jpg
ASh 10.1.2-3 CD.jpg ASh 10.1.2-4 CD.jpg

1 WORK INCLUDED

(1) Step 1
Use a standard 225 mm (9”) long step flashing and scribe the fold lines as shown on the illustration. Note that the down-slope upstand is bent at a 110-degree angle to the slope. No cutting is needed or appropriate; the flashing is formed with folds, bread-pan style.
(2) Step 2
Fold the bottom end of the flashing as illustrated, so that the bottom upstand aligns with the vertical bread-pan fold made in the next step.
(3) Step 3
Fold the back flap around and behind the main upstand, bread-pan style.
(4) Step 4
If required or desirable, cut a capillary notch in the bottom upstand (illustrated), and trim the upstand to suit the aesthetics of the roof.

2 RELATED WORK BY OTHERS

None

NOTE: See the Standard for additional requirements.


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