Best Practices for Installing Solar PV on Steep-slope...

5/26/13

1

©2013 Center For Environmental Innovation in Roofing, All Rights Reserved

Best Practices for Installing Solar PV on Steep-slope Roofs

James R. Kirby, AIA VP of Sustainability Center for Environmental Innovation in Roofing

May 9, 2013


► Masters of Architecture, Structures •  University of Illinois

► Graduate Certificate in Sustainable Design and Construction

•  Boston Architectural College, Sustainable Design Institute

ARCHITECTURE AND BUILDING SCIENCE

5/26/13

2


Steep-slope Roofing Types


§  Asphalt Shingles

§  Clay and Concrete Tiles

§  Metal Panels and Metal Shingles

§  Wood Shakes and Shingles

§  Slates

§  Synthetics


5/26/13

3


Steep-slope Roofs


Steep-slope Roofs

5/26/13

4


Steep-slope Roofs


Steep-slope Roofing Installation Methods Low-slope

•  Nails for asphalt shingles, tiles, slate •  Nails or staples for wood •  Clips with screws for metal panels •  Screws or clips and screws for metal

shingles

5/26/13

5


The Rooftop PV Industry


•  Low-slope roofs: •  Primarily ballasted/non-penetrating rack systems

•  Adhered, penetrating racks

•  May 23, 2013 •  Steep-slope roofs

•  Primarily penetrating attachment systems

•  Adhered (metal) •  BIPV •  May 9, 2013

PV :: Current Products

5/26/13

6


§  Asphalt Shingles

§  Clay and Concrete Tiles

§  Metal Panels and Metal Shingles

§  Wood Shakes and Shingles

§  Slates

§  Synthetics



Steep-slope Roofs

5/26/13

7


Steep-slope Roofs


Steep-slope Roofs

5/26/13

8


§  Equivalent service life §  Load §  Drainage §  Wind §  Fire §  Warranties §  Maintenance §  Safety

Roof Considerations


Asphalt Shingles

5/26/13

9


Shingle Concept


Shingle Concept

5/26/13

10


Shingle Concept


Shingle Concept

5/26/13

11


Shingle Concept


Shingle Concept

5/26/13

12


Shingle Concept


Shingle Concept

5/26/13

13


Shingle Concept


Shingle Concept

5/26/13

14


Flashings need to go to the top of the penetrated shingle


Nail Placement

2006 John Wiley + Sons, Best Practices Guide To Residential Construction

Adept Roofing

5/26/13

15


TRA-MAGE

Shingle counterflashing


Shingle Counterflashing

Quick Mount PV

New (see next slide)

Reroof

5/26/13

16


Roof Attachment and Flashing


Roof Loading

5/26/13

17


Flashing: “like a large penetration”


This is not a long-term weathertight installation.

5/26/13

18


Roof Protection

Solar Energy International Lab Class Paonia, CO


Metal Panels and Shingles

5/26/13

19


Metal panels with PV

S-5! Zep Solar …note the fire barrier


Metal Panel Attachments

Unirac

5/26/13

20


Metal Panel Clamps


Metal Panels With Adhered PV

SoloPower CIGS a-Si

5/26/13

21


Clay and Concrete Tiles


Tiles: Two-level Flashing

Quick Mount PV

5/26/13

22


Tiles: Two-level Flashing

Quick Mount PV


Tile: Hooks

Quick Mount PV

5/26/13

23


Tile: Hooks


Wood and Slate

5/26/13

24


Wood Shingle Installation


Wood Shingles and Shakes

5/26/13

25


Slate


BIPV

5/26/13

26


Lumeta

No penetrations

Atlantis Energy


No Penetrations Dow PowerHouse™

5/26/13

27


2012 I-Codes


§  Each will have specific code language regarding roof-mounted PV systems

§  IBC: differentiating between adhered and rack systems

§  IRC: differentiating between PV and solar thermal (hot water)

§  IFC: access to and on rooftop, safety on rooftop

IBC/IRC/IFC 2012

5/26/13

28


2012 IFC considerations §  Based, in part, on CAL FIRE Solar PV Installation

Guideline

Rooftop layout


The Center For Environmental Innovation in Roofing

5/26/13

29


§  CSRP: Certified Solar Roofing Professional

§  Certification by RISE

www.riseprofessional.org

§  NABCEP

§  The North American Board for Certified Energy Practitioners

Credentials


THE CENTER

58

THE CENTER Center

White House

816 CONNECTICUT AVENUE, NW, WASHINGTON, DC 20006

►  Public Advocacy •  Codes and standards •  Government policy

►  Roofing Research •  Standing research committee

►  Sustainability •  Insulation; Building Envelope •  Photovoltaics Task Force

►  International Outreach •  Latin America, plus

►  Member Support ►  Market support ►  Education and training

5/26/13

30


§  A roof-rating system

§  New and reroofing

§  Functional areas

§  Energy Management

§  Materials Management

§  Water Management

§  Durability/Life Cycle Management

RoofPoint


CEIR Racking and Attachment Criteria for Effective Membrane Roof System Integration

www.roofingcenter.org/special/pv

The CIER PV TF is currently developing Criteria for Effective Low-Slope Metal Panel Roof Systems.

5/26/13

31


§  Five Fundamental Principles

§  External Forces

§  System Integration

§  Roof Drainage

§  Roof and PV System Maintenance

§  Roof Safety

CEIR Racking and Attachment Criteria for Effective Membrane Roof System Integration


James R. Kirby, AIA VP of Sustainability

Center for Environmental Innovation in Roofing 816 Connecticut Avenue, NW Washington, DC 20006 www.roofingcenter.org www.roofpoint.org @JamesKirbyCEIR [email protected]

Best Practices for Installing Solar PV on Steep-slope...

Documents

Transcript of Best Practices for Installing Solar PV on Steep-slope...