EXPOSED FASTEN Design & Detail Guide – J

EXPOSED FASTEN Design & Detail Guide – June 2018

ROOF LAYOUT

EXPOSED FASTEN

HPM CUSTOM METAL ROOFING


EAVE (PAGE 4)

HIP (PAGE 8)

CURB (PAGE 17)

RAKE/GABLE (PAGE 5)

RIDGE (PAGES. 8-9)

RAKE/

GABLE

(PAGE 5)

RIDGE

(PAGES 8-9)

VALLEY

(PAGE 15)

SLOPE

TRANSITIOM

(PAGES 13-14)

HEADWALL

(PAGE 10)

(BELOW)

HEADWALL

(PAGE 10)

(BELOW)

EAVE

(PAGE 4)

RAKE WALL

(PAGE 6-7)

(BELOW)

RAKE/GABLE

(PAGE 5)

Section

General Design Information

Panel Profile Line Drawings W/Dimensions

Fastener Placement

Lap Detail

Closures

Eave

Rake / Gable

Rake Wall with Reglet (Saw Cut)

Rake Wall with Reglet (Surface Mount)

Ridge / Hip

Vented Ridge/Hip

Head Wall

Vented Headwall

High Eave / Peak

High Slope to Low Slope Transition

Valley

Pipe Boot Detail

Roof Curb Layout

Upper Roof Curb

Lower Roof Curb

Curb Rake Wall

Wall Opening Overview

Wall Head

Wall Sill

Wall Jamb

Wall Inside Corner

Wall Outside Corner

Trim Side Lap

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

Page

HPM CUSTOM METAL ROOFING - Table of Contents -


23

24

25

26

27

28

22

GENERAL NOTES

EXPOSED FASTEN

General InformationThe enclosed roofing system information and details are a design aidand do not represent all conditions. The designer and end-user areresponsible to review climate and environmental conditions such asmarine and salt air, acid rain from volcanic activity, governing coderequirements, and the building use to modify the details and specifythe appropriate project specific materials.

Slope Requirement:EXPOSED FASTEN roofing panels should be installed on aminimum slope of 3:12 or greater. Inquire for slopes below 3:12.

Substrate:EXPOSED FASTEN roofing panels can be used over solid substratesor can span over supports.

Panel Attachment:Review the EXPOSED FASTEN fastener recommendations in thisguide to select the correct fastener. For the attachment schedule,contact your HPM Technical Representative for proper spacing andfastener size, type, and quantities to meet the project's wind uplift(negative) load requirements. The details in this guide on page 2 arethe recommended minimums for each panel profile.NOTE: Exposed fasteners may be vulnerable to acceleratedcorrosion if not specified correctly. Consult with HPM forrecommendations on appropriate fastener types.

Condensation, Insulation, & Ventilation:It is the designer's responsibility to determine the need andcomposition of condensation control materials including insulation,vapor retarders and ventilation requirements. Metal roofing issusceptible to condensation and its control should be carefullyconsidered. Applications over rigid insulation may require solidblocking/framing for installation of perimeter flashings and drag loadfasteners.

Cut Edge Corrosion Protection:Metal roofing panels and flashings have cut edges that are not asprotected as the main panel surface areas which have substratetreatment and paint as a barrier. Left untreated, the effects ofexposure from marine air, and acid rain from volcanic activity willcause a condition called 'edge creep'. The designer should specify theend user/installer field apply a product designed to seal the cut edgeand protect the base metal. This treatment should be applied duringthe initial install and annually as regular maintenance. See HPM'swebsite for information about Edge Seal™, a product developed by aleading paint manufacturer specifically to protect cut edges andretard edge creep.

Flashings:It is best practice to specify all flashings are the same material gauge,color, and finish as the roof panels. Where possible, flashings shouldbe lapped away from prevailing winds. Check with an HPMTechnical Representative if you intend to specify a prefinishedflashing in a material different than the roof panels. The encloseddetails have minimized the use of exposed fasteners where possible.The edges of flashings are shown hemmed to strengthen andminimize the exposure of cut edges. See notes under the 'Cut EdgeCorrosion Protection' section. HPM provides standard flashingdrawings as a reference in this guide and on the website. Projectspecific flashing drawings are generally the responsibility of theinstaller.

Valleys:Valley dimensions must be the proper width to account for slope andrain conditions. Valleys must have positive slope for drainage and bekept free of debris so that water does not back up and intrude underthe panels.

Touch-up Paint:During installation minor scratches may occur. Most conditions canbe treated with an air-dry Kynar paint pen. HPM provides paint pensin colors to match the roof panel system. Touch-up paint shouldalways be used sparingly.

Thermal Movement:Panels and flashings must allow for thermal movement (expansionand contraction) of the materials, especially where long lengths areused.

Underlayment:Prior to installation, an underlayment material may be installed overthe roof substrate. The designer should select and specify anappropriate material. The specified material must have a non-abrasivetop surface that will not mar, scratch, or abrade the underside of themetal panels and flashings.

Oil Canning:Flat metal surfaces can display waviness commonly referred to as 'oilcanning'. This can be caused by variations in raw material, processingvariations, product handling, or variations in substrate and roofingunderlayments. Panels are available with striations, stiffening ribs, orembossments to minimize oil canning. Oil canning is a condition thatoccurs, not a defect and is not a cause for rejection.

Product Warranty:Material options and warranties will vary based on project and sitespecific conditions such as severe marine, or acid rain from volcanicactivity. Consult with your HPM Sales or Technical Representative todiscuss the warranty options for your project.

Technical Assistance:Contact your HPM Sales or Technical Representative for moreinformation and assistance when selecting a custom metal roofsystem.



EXPOSED FASTEN

FASTENER PLACEMENT

EXPOSED FASTEN DESIGN & DETAIL GUIDE- JUNE 2018

CUSTOM 4-RIB (P9)

COMMERCIAL RIB (P7)

CUSTOM BOX-RIB

PAGE 3

CUSTOM 6-RIB (P8)

OPEN FRAMING SOLID SUBSTRATE 2X WOOD BLOCKING LAP SCREW

#9-15 x 2"

#9-15 x 1 1/2"

#9-15 x 1"

#12-14 x 2"

#12-14 x 1 1/2"

#12-14 x 1"

#9-15 x 2"

#9-15 x 1 1/2"

#9-15 x 1"

#14 x 7/8" Lap Tek(5/16" HWH)

#10 x 3/4" Stich Screw(1/4" HWH)(5/16" HWH)

(light gauge to light gauge)(to dimensional lumber)( to plywood deck)(to steel purlins)

(1/4" HWH)(1/4" HWH)

EXPOSED FASTEN

LAP DETAIL

EXPOSED FASTEN DESIGN & DETAIL GUIDE- JUNE 2018

CUSTOM 4-RIB (P9)

COMMERCIAL RIB (P7)

CUSTOM BOX-RIB

PAGE 4

CUSTOM 6-RIB (P8)

OPEN FRAMING SOLID SUBSTRATE 2X WOOD BLOCKING LAP SCREW

#9-15 x 2"

#9-15 x 1 1/2"

#9-15 x 1"

#12-14 x 2"

#12-14 x 1 1/2"

#12-14 x 1"

#9-15 x 2"

#9-15 x 1 1/2"

#9-15 x 1"

1/4"-14 x 7/8"

TAPE SEALANT

TAPE SEALANT

TAPE SEALANT

TAPE SEALANT

0'-3"

CUT BACK

1

8

"

0'-3"

MIN.

LAP

(2) 3/8" BEADS

OF BUTYL

SEALANT

NOTES:

ALL TRIMS REQUIRE A 3" LAP EXCEPT

VALLEY TRIM WHICH REQUIRES A 9" LAP

USE POP RIVETS

IN SEALANT

ONLY TO MIN.

FISH-MOUTHING

TRIM LAP PAGE 28

EXPOSED FASTEN




Kapolei, Hawaii

Campbell Industrial Park

91-302 Hanua Street

Kapolei, HI 96707

Phone: (808) 682-8560

Toll Free: (877) 841-7633

Fax: (808) 682-8565

Email: [email protected]

Kea'au, Hawaii

Shipman Industrial Park

16-166 Melekahiwa Street

Keaau, HI 96749

Phone: (808) 966-5660

Toll Free: (800)317-4161

Fax: (808) 966-5672

Website: http://hpmhawaii.com/custom-metal-roofing/All Rights Reserved.


EXPOSED FASTEN Design & Detail Guide – J

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