X-E3of3_NRCARoofingManualSlopeRoofSlate.pdf

383The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 4—Roof System Configurations

Slate Roof System With Single Layer of Mechanically Attached Underlayment

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 5.

Roof Slope Limitations

Refer to Chapter 1—Roof Decks for detailed information regarding roof slope.

Minimum slope: 4:12

Underlayment (select one)

Refer to Chapter 2—Underlayments for detailed information regard-ing underlayments.

formulated for high-temperature exposures

Drip Edge Metal (select one and specify metal type and gauge)

Refer to Section 3.2—Slate Design and Installation for additional information about drip edge metal.

Eave Cant (select one; specify thickness and width)

Roofing Slate (specify grade, size, thickness, color designation, field pattern, and hip and ridge detailing methods)

Refer to Chapter 3—Slate for detailed information about roofing slate.

Roofing Slate Attachment (select material and/or corrosion-resistant treatment; specify length, shank type and diameter, and fastening requirements)

Refer to Section 3.1—Slate Materials for detailed information about selecting roofing slate fasteners.

(smooth, round, barbed or otherwise deformed shank) o Copper nails o Stainless-steel nails [Type 304 or Type 316] o

Roof Flashing Sealant (specify as appropriate)

Refer to Section 3.1—Slate Materials for detailed information about

Flashing (specify metal type and gauge)

Refer to Section 3.2—Slate Design and Installation and Chapter 6— Construction Details for detailed information regarding clay and con-

Refer to the Architectural Metal Flashing section of The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Re-

Valley Construction Type (select one and specify metal, gauge, width, profile and attachment type)

Open valley

Closed or mitered valley valley

Weatherproof Flashing Membrane (if applicable)

Refer to Section 3.1—Slate Materials for additional information re-

Roof Accessories

Refer to Appendix—Roof Accessories for detailed information regarding roof accessories.

Slate Roof System With Single Layer of Self-adhering Underlayment

384 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 4—Roof System Configurations

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, Slate Roof System With Single Layer of Self-adhering Underlayment

385The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 4—Roof System Configurations

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, roof slope.

Minimum slope: 4:12

Underlayment

Refer to Chapter 2—Underlayments for detailed information regard-ing underlayments.

Underlayment Attachment (select material and/or corrosion-resistant treatment; specify length, shank type and diameter, and fastening requirements)

11-gauge fasteners [ASTM F1667, Type I, Style 20] o Minimum 1-inch diameter, minimum 32-gauge metal cap nails o Minimum 1-inch diameter plastic cap nails

Water and Ice-dam Protection Membrane (if specified)

Refer to Chapter 2—Underlayments for detailed information regard-ing water and ice-dam protection membranes.

formulated for high-temperature exposures

Drip Edge Metal (select one if applicable and specify metal type and gauge)

Refer to Section 3.2—Slate Design and Installation for additional information about drip edge metal.

Eave Cant (select one if applicable; specify thickness and width)

Roofing Slate (specify grade, size, thickness, color designation, field pattern, and hip and ridge detailing methods)

Refer to Chapter 3—Slate for detailed information about roofing slate.

Roofing Slate Attachment (select material and/or corrosion-resistant treatment; specify length, shank type and diameter, and fastening requirements)

Refer to Section 3.1—Slate Materials for detailed information about selecting roofing slate fasteners.

(smooth, round, barbed or otherwise deformed shank) o Copper nails o Stainless-steel nails [Type 304 or Type 316] o

Roof Flashing Sealant (specify as appropriate)

Refer to Section 3.1—Slate Materials for detailed information about

Flashing (specify metal type and gauge)

Refer to Section 3.2—Slate Design and Installation and Chapter 6— Construction Details for detailed information regarding clay and con-

Refer to the Architectural Metal Flashing section of The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Re-

Valley Construction Type (select one and specify metal, gauge, width, profile and attachment type)

Open valley

Closed or mitered valley valley

Weatherproof Flashing Membrane (if applicable)

Refer to Section 3.1—Slate Materials for additional information re-

Roof Accessories

Refer to Appendix—Roof Accessories for detailed information regarding roof accessories.

386 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 4—Roof System Configurations

Slate Roof System With Double Layer of Mechanically Attached Underlayment

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 387The NRCA Roofing Manual: Steep-slope Roof Systems—2013

Slate Roof System With Double Layer of Mechanically Attached Underlayment

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, roof slope.

Minimum slope: 4:12

Underlayment

Refer to Chapter 2—Underlayments for detailed information regard-ing underlayments.

First layer formulated for high-temperature exposures

Second layer (select one)

Underlayment Attachment (select material and/or corrosion-resistant treatment; specify length, shank type and diameter, and fastening requirements)

11-gauge fasteners [ASTM F1667, Type I, Style 20] o Minimum 1-inch diameter, minimum 32-gauge metal cap nails o Minimum 1-inch diameter plastic cap nails

Water and Ice-dam Protection Membrane (if specified)

Refer to Chapter 2—Underlayments for detailed information regard-ing water and ice-dam protection membranes.

formulated for high-temperature exposures

Drip Edge Metal (select one and specify metal type and gauge)

Refer to Section 3.2—Slate Design and Installation for additional information about drip edge metal.

Eave Cant (select one; specify thickness and width)

Roofing Slate (specify grade, size, thickness, color designation, field pattern, and hip and ridge detailing methods)

Refer to Chapter 3—Slate for detailed information about roofing slate.

Roofing Slate Attachment (select material and/or corrosion-resistant treatment; specify length, shank type and diameter, and fastening requirements)

Refer to Section 3.1—Slate Materials for detailed information about selecting roofing slate fasteners.

(smooth, round, barbed or otherwise deformed shank) o Copper nails o Stainless-steel nails [Type 304 or Type 316] o

Roof Flashing Sealant (specify as appropriate)

Refer to Section 3.1—Slate Materials for detailed information about

Flashing (specify metal type and gauge)

Refer to Section 3.2—Slate Design and Installation and Chapter 6— Construction Details for detailed information regarding clay and con-

Refer to the Architectural Metal Flashing section of The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Re-

Valley Construction Type (select one and specify metal, gauge, width, profile and attachment type)

Open valley

Closed or mitered valley valley

Weatherproof Flashing Membrane (if applicable)

Refer to Section 3.1—Slate Materials for additional information re-

Roof Accessories

Refer to Appendix—Roof Accessories for detailed information regarding roof accessories.

Slate Roof System With Two Layers of Underlayment

388 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 4—Roof System Configurations

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 389The NRCA Roofing Manual: Steep-slope Roof Systems—2013

Slate Roof System With Two Layers of Underlayment

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 390 The NRCA Roofing Manual: Steep-slope Roof Systems—2013

Slate Roof System With Two Layers of Underlayment

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 391The NRCA Roofing Manual: Steep-slope Roof Systems—2013

Slate Roof System With Two Layers of Underlayment

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, NRCA does not consider slate roof systems appropriate for re-cover applications.

CHAPTER 5

ROOF RE-COVERING

The NRCA Roofing Manual: Steep-slope Roof Systems—2013

393The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 5—Roof Re-covering

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, Chapter 6—Construction Details provides technical information concerning the design and installation of construction details for quality slate roof systems. This introduction is intended to supplement the notes on the individual construction details.

Construction details applicable to slate roof systems are denoted as “SLATE-” followed by a number and possibly a letter (e.g., SLATE-1 and SLATE-1A).

The letter designation after the roof system type delinea-tion and number identifies NRCA’s order of preference for addressing a specific detail condition. For example, Construction Detail SLATE-3–Eave With Water and Ice-dam Protection Membrane depicts NRCA’s preferred method of addressing an eave detail using a water and ice-dam protection membrane with a stripping layer over the flange of the drip edge metal. Construction Detail SLATE-3A—Eave With Water and Ice-dam Protection Membrane depicts an alternative detail NRCA also con-siders acceptable based on any limitations described.

6.1 Information Applicable to All

Construction Details

The construction details in this manual provide a generic concept for each specific detail type shown. NRCA’s construction details likely will require modification to meet a project’s specific requirements. It is a designer’s responsibility to adapt the construction details to project requirements.

The information contained in this manual is intended to primarily address new construction details. When con-sidering reroofing projects, the Reroofing section of The NRCA Roofing Manual: Architectural Metal Flashing, Condensation Control and Reroofing should be consulted regarding the decision to re-cover or remove existing roof systems and for general information applicable to reroof-ing steep-slope roof systems. Once a decision to re-cover or remove existing roof systems is made, most information contained in this section can apply to reroofing.

CHAPTER 6

CONSTRUCTION DETAILS

The NRCA Roofing Manual: Steep-slope Roof Systems—2013

395The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, NRCA suggests the construction details in this manual be used in the design of roof systems only after a number of criteria have been carefully considered, including:

expectancy conditions cluding potential material discharge onto a roof tem application methods

These criteria play important roles in the success or fail-ure of every roof assembly and must be considered by a designer to determine the appropriate components of a roof assembly, applicable specifications and construction details to be used.

In addition to the criteria previously listed, specific to a roof system’s construction details, NRCA recommends de-signers consider the following factors for slate roof systems.

Other Trades’ Components: Components that may be provided or installed by other trades that are incorporated into roof systems can be critical to the weathertight integrity of completed roof systems. These components may include:

penetrations

Definition of responsibility for the above components should be determined prior to job initiation.

Penetrations and Clearance: The maximum amount of space should be provided between pipes, walls and curbs to facilitate proper installation of flashings.

NRCA recommends a minimum of 12 inches of clear-ance between pipes, a minimum of 12 inches between pipes and curbs or walls and a minimum of 24 inches of clearance between walls and curbs. Penetrations should not be located in valley areas. A minimum distance of 18 inches is recommended between a penetration and valley center. See Figure 6-1.

NRCA advises against using roof surfaces for the instal-lation of satellite dishes, radio and television aerials and sign supports. Attachment to wall surfaces is recom-mended instead.

Metal Flashing Components: Apron, step, crick-et and backer flashings require some form of counter-flashing to cover and protect their top edges from water intrusion. Common counterflashing configurations are shown in Figure 6-2 on pages 396-398.

396 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 5.

crick-et

397The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

In some instances, the wall covering or cladding material performs the counterflashing function.

For additional information regarding metal counterflash-ing, including joinery and securement options, refer to the Architectural Metal Flashing section of The NRCA Roofing Manual: Architectural Metal Flashing, Conden-sation Control and Reroofing.

Job-site fabricated Components: A majority of the construction details illustrated in this manual depict job-site-fabricated construction. Many roof system manu-guidelines that permit the use of materials other than those indicated in these details. Flashing materials may vary greatly; individual manufacturer’s requirements should be examined and evaluated for construction compatibility.

Figure 6-1: Guide for clearances between pipes, walls, curbs and valleys

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 398 The NRCA Roofing Manual: Steep-slope Roof Systems—2013

Figure 6-2: Sheet-metal counterflashing options

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 399The NRCA Roofing Manual: Steep-slope Roof Systems—2013

OPTIONAL: SEALANT OR

ELASTOMERIC TAPE

OPTIONAL: 2'' WIDE CLIP

APPROX. 30'' O.C.

3'' LAP AT JOINT

ONE-PIECE SHEET-METAL

COUNTERFLASHING

APPROPRIATE FASTENERS

APPROX. 12'' O.C.

APPROPRIATE SEALANT

TOOLED TO FACILITATE

RUNOFF

OPTIONAL: SEALANT OR

ELASTOMERIC TAPE

OPTIONAL: 2'' WIDE CLIP

APPROX. 30'' O.C.

REMOVABLE SHEET-METAL

COUNTERFLASHING

3'' LAP AT JOINTS

APPROPRIATE FASTENERS

24'' O.C.

SURFACE-MOUNTED

SHEET-METAL RECEIVER

APPROPRIATE FASTENERS

APPROX. 12'' O.C.

APPROPRIATE SEALANT

TOOLED TO FACILITATE

RUNOFF

Figure 6-2: Sheet-metal counterflashing options (continued)

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, 400 The NRCA Roofing Manual: Steep-slope Roof Systems—2013

Figure 6-2: Sheet-metal counterflashing options (continued)

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6,

6.2 Index of Drawings

SLATE-1 Eave

SLATE-2 Eave With Gutter

SLATE-3 Eave With Water and Ice-dam Protection Membrane

SLATE-3A Eave With Water and Ice-dam Protection Membrane

SLATE-4 Eave With Gutter and Water and Ice-dam Protection Membrane

SLATE-5 Rake

SLATE-6 Ridge With Slate

SLATE-7 Ridge With Sheet-metal Cap

SLATE-8 Venting Ridge Cap Flashing

SLATE-9 Hip

SLATE-10 Open Valley

SLATE-11 Closed Valley

SLATE-12 Headwall Flashing

SLATE-13 Sidewall Flashing With Two-piece Counterflashing

SLATE-13A Sidewall Flashing With One-piece Counterflashing

SLATE-14 Expansion Joint

SLATE-15 Vent Pipe Penetration

SLATE-16 Chimney With Cricket Flashing

SLATE-18 Curb-mounted Skylight

SLATE-19 Steep- to Low-slope Roof System Transition

401The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, h Cricket

EAVE

DRIP EDGE METAL

SLATE STARTER COURSE

EAVE CANT STRIP, THICKNESS TO MATCH SLATE

APPROX. 1/2" TO 1" OVERHANG

REFER TO INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

UNDERLAYMENT

SLATE

FASTENERS

SLATE-1

402 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, EAVE WITH GUTTER

SLATE STARTER

COURSE

EAVE CANT STRIP, THICKNESS TO MATCH SLATE

APPROX. 1/2" TO 1" OVERHANG

UNDERLAYMENT

SLATE

FASTENERS

SLATE-2

REFER TO INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

THIS DETAIL SHOWS ONE TYPE OF GUTTER SUPPORT. GUTTER SECUREMENT AND SUPPORT OPTIONS VARY.

GUTTER

403The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, EAVE WITH WATER AND ICE-DAM PROTECTION MEMBRANE

SLATE STARTER COURSE

EAVE CANT STRIP, THICKNESS TO MATCH SLATE

APPROX. 1/2" TO 1" OVERHANG

REFER TO INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

UNDERLAYMENT

WATER AND ICE-DAM PROTECTION MEMBRANE

SLATE

FASTENERS

SLATE-3

STRIPPING PLY

MIN. 24"

404 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, EAVE WITH WATER AND ICE-DAM PROTECTION MEMBRANE

SLATE STARTER COURSE

EAVE CANT STRIP, THICKNESS TO MATCH SLATE

APPROX. 1/2" TO 1" OVERHANG

REFER TO INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

UNDERLAYMENT

WATER AND ICE-DAM PROTECTION MEMBRANE

SLATE

FASTENERS

SLATE-3A

MIN. 24"

405The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, EAVE WITH GUTTER AND WATER AND ICE-DAM PROTECTION

MEMBRANE

DRIP EDGE METAL

SLATE STARTER

COURSE

EAVE CANT STRIP, THICKNESS TO MATCH SLATE

APPROX. 1/2" TO 1" OVERHANG

REFER TO INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

UNDERLAYMENT

WATER AND ICE-DAM PROTECTION MEMBRANE

SLATE

FASTENERS

SLATE-4

STRIPPING PLY

THIS DETAIL SHOWS ONE TYPE OF GUTTER SUPPORT. GUTTER SECUREMENT AND SUPPORT OPTIONS VARY.

GUTTER

MIN. 24"

406 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, RAKE

REFER TO THE INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

SLATE

UNDERLAYMENT

L- OR T-TYPE DRIP EDGE

METAL

APPROX. 1" OVERHANG

WITH L-TYPE DRIP EDGE

METAL

FASTENERS

SLATE-5

407The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, RIDGE WITH SLATE

SHEET-METAL FLASHING

NAILERS

THICKNESS TO

MATCH SLATE

THICKNESS(ES)

OPTIONAL: SEALANT ALONG RIDGE JOINTS

OPTIONAL: ROOF CEMENT

UNDERLAYMENT

WRAPPED OVER

RIDGE

RIDGE SLATE WITH PRE-PUNCHED HOLES

FASTENERS COVERED BY SUCCEEDING RIDGE SLATE

SLATE-6

SELF-ADHERING MEMBRANE

408 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, RIDGE WITH SHEET-METAL CAP

UNDERLAYMENT

WRAPPED OVER

RIDGE

SLATE

SHEET-METAL RIDGE CAP

NAILER THICKNESS TO

MATCH SLATE

WEATHERPROOF FLASHING MEMBRANE

OPTION

SLATE-7

409The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, VENTING RIDGE CAP FLASHING

SHEET-METAL AIR DAM

WITH WEEPHOLES

NAILERS

THICKNESS TO MATCH

SLATE THICKNESS(ES)

SHEET-METAL

RIDGE CAP

UNDERLAYMENT

WEATHERPROOF FLASHING

MEMBRANE

SLATE-8

RIGID VENT MATERIAL

WEATHERPROOF FLASHING

MEMBRANE

RIGID VENT MATERIAL

410 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, HIP

UNDERLAYMENT

WRAPPED OVER HIP

SLATE

HIP SLATE

NAILER

THICKNESS TO

MATCH SLATE

CONTINUOUS

WEATHERPROOF

FLASHING MEMBRANE

OR INDIVIDUAL

SHEET-METAL STEP

FLASHING INTERLACED

BETWEEN COURSES

SEALANT ALONG HIP JOINTS

OPTIONAL:

ROOF CEMENT

SLATE-9

411The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, OPEN VALLEY

SLATE SHOULD NOT BE FASTENED THROUGH THE VALLEY METAL. USE WIRE-TIED SYSTEMS.

VALLEY METAL

FABRICATED FROM

MIN. 18'' WIDE SHEET

LAP VALLEY METAL

MIN. 8" AND SET IN

SEALANT

VALLEY

UNDERLAYMENT

METAL CLIP (APPROX.

2'' WIDE) MIN. TWO

FASTENERS PER CLIP

EXTEND SLATES 4'' MIN.

OVER VALLEY METAL

SLATE

CONTINUOUS

STRIPPING PLY

ON BOTH SIDES

OF VALLEY

METAL

FIELD UNDERLAYMENT AND

ROOF DECK NOT SHOWN

FOR CLARITY

REFER TO THE INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

SLATE-10

WIRE-TIE

412 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, CLOSED VALLEY

MINIMUM SLOPE FOR THIS DETAIL IS 8:12.

FIELD UNDERLAYMENT AND

ROOF DECK NOT SHOWN

FOR CLARITY

18'' WIDE MIN.

VALLEY SHEET-METAL

STEP FLASHING AT EACH

COURSE

SLATE

VALLEY UNDERLAYMENT

REFER TO THE INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

VALLEY STEP FLASHING LENGTH=

EXPOSURE+HEADLAP+2"

SLATE-11

LOCATE FASTENERS

APPROX. 8" FROM CENTER

OF VALLEY

413The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6, HEADWALL FLASHING

WALL SIDING/CLADDING

NOT SHOWN FOR CLARITY

BUILDING WRAP OVERLAP

COUNTERFLASHING MIN. 2"

TWO-PIECE SHEET-METAL

COUNTERFLASHING

OVERLAP FLASHING MIN. 2"

SHEET-METAL FLASHING

WITH HEMMED EDGE

UNDERLAYMENT

TURNED UP WALL

SLATE

NAILER

THICKNESS TO

MATCH SLATE

APPROPRIATE

FASTENERS

EXTEND

HEMMED EDGE TO

MAINTAIN SLATE

EXPOSURE OR

MIN. 4"

SLATE-12

REFER TO THE INTRODUCTION OF THE CONSTRUCTION DETAILS CHAPTER FOR ADDITIONAL INFORMATION.

FOR SECUREMENT AND JOINERY OPTIONS FOR SHEET METAL AND COUNTERFLASHING OPTIONS, REFER TO THE NRCA ROOFING MANUAL:

ARCHITECTURAL METAL FLASHING, CONDENSATION CONTROL AND REROOFING.

414 The NRCA Roofing Manual: Steep-slope Roof Systems—2013 Slate Roof Systems | Chapter 6—Construction Details

N

R C A R ep ri nt p er m is si on g ra nt ed t o

Er ic

F or d at

C an e R iv er C re ol e N

H P.

N o fu rt he r re pr od uc tio ns a ut ho ri ze d.

M ar

6,