Solar Roofing Best Practices_Dec.2010

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This document discusses best practices for roofing solar installations. It notes problems in the industry like voided roof warranties and lack of regulation. It emphasizes the importance of following codes and flashing at all roof penetrations to avoid water intrusion issues. The document recommends that solar installers think like roofers and respect the roof when installing panels. It provides examples of code-compliant mounting systems for different roof types like composition, wood shake and tile roofs. Flashings are highlighted as critical to maintaining waterproofing and roof warranties.

Technology

Roofing Best Practices
For Solar Installations

Following Codes
and
Maintaining Quality

Presented by Johan Alfsen
Quick Mount PV

Problems in the Industry:

What’s Wrong in This Picture?

Why Respect the Roof?

“…80% of all construction related
litigation stems from water intrusion.”
- Rob Hernandez
Pitched Roof Racking
SolarPro
November 2008

It takes only a single leak to cause callbacks, a ruined job, or even a lawsuit.

Think Like a Roofer
• Solar installers need to think and
act like roofers when they step onto a
roof with a drill.

• Who would install a skylight or vent
jack without complete waterproof
flashing?

• How would a roofer approach
mounting PV or solar thermal panels
to a customer’s roof?

• How do we maintain roof
warranties?

• What is “code” for solar mounts?

12/2/10 5

Wheel of Accountability

Source: www.quickmountpv.com

Important Roofing Codes

UBC & IBC: flashing required
at all roof openings

NRCA “Best Practices”: no
exposed fasteners

SMACNA: galvanized - not
for use on roofs exceeding
15 year lifespan

*Also refer to ARMA & roofing manufacturers
specifications.

The Good, The Bad, The Ugly
*None of these are code compliant*

The Good, The Bad, The Ugly
Must have flashing on all roof penetrations

Composition / Asphalt Roof

1. Lift composite tile and clear nails 2. Drill ¼” pilot hole for lag bolt

3. Add roof sealant to pilot hole 4. Slide Quick Mount into place

Composition / Asphalt Roof

5. Drive lag bolt into rafter 6. Add EPDM rubber gasket

7. Attached preferred rails 8. Move onto the next…

Composition / Asphalt Roof

Good Example of a Code-Compliant Solar Racking System

Wood Shake Roof
Most shake roofs consist of interlaid felt paper
for waterproofing

The QM Shake Mount 18x18 flashing is
designed to slip under the felt paper

Tile Roofs

Good Example of a Code-Compliant Solar Racking System

Why Double Flashing?

Tile roofs are waterproof at underlayment. A primary flashing at the
underlayment level is critical.

Why Double Flashing?

Tile roofs must be waterproof at underlayment level AND top tole level

The Best Insurance

• The vital importance of the solar rooftop
mounting system is often overlooked and
undervalued.

• Proper code compliance protects roof
warranties and the installer’s liability.

• Flashing is cheap insurance!!!

THANK YOU!
Johan Alfsen
International Training Manager
(925) 687-6686
johan@quickmountpv.com

tech@quickmountpv.com

SunModo, meaning “the way of the sun,” is a private U.S. company based in Vancouver, Washington focused on innovative racking and mounting solutions for professional installers in the fast-growing solar industry. We are energized every day by a desire to make solar installation easier, more reliable and more affordable. Our commitment to innovation can be seen across our entire product line, which includes 14 industry-shaping patents. Read more: http://sunmodo.com

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Solar Roofing Best Practices_Dec.2010

1. Roofing Best Practices For Solar Installations Following Codes and Maintaining Quality Presented by Johan Alfsen Quick Mount PV

2. Problems in the Industry: - Disconnect between Solar & Roofing Industry - Voided Roof Warranties - No Regulation - Outdated Technology - Cost/Competition - Lack of Training

3. Problems in the Industry: What’s Wrong in This Picture?

4. Why Respect the Roof? “…80% of all construction related litigation stems from water intrusion.” - Rob Hernandez Pitched Roof Racking SolarPro November 2008 It takes only a single leak to cause callbacks, a ruined job, or even a lawsuit.

5. Think Like a Roofer • Solar installers need to think and act like roofers when they step onto a roof with a drill. • Who would install a skylight or vent jack without complete waterproof flashing? • How would a roofer approach mounting PV or solar thermal panels to a customer’s roof? • How do we maintain roof warranties? • What is “code” for solar mounts? 12/2/10 5

6. Wheel of Accountability Source: www.quickmountpv.com

7. Important Roofing Codes UBC & IBC: flashing required at all roof openings NRCA “Best Practices”: no exposed fasteners SMACNA: galvanized - not for use on roofs exceeding 15 year lifespan *Also refer to ARMA & roofing manufacturers specifications.

8. The Good, The Bad, The Ugly *None of these are code compliant*

9. The Good, The Bad, The Ugly Must have flashing on all roof penetrations

10. Composition / Asphalt Roof 1. Lift composite tile and clear nails 2. Drill ¼” pilot hole for lag bolt 3. Add roof sealant to pilot hole 4. Slide Quick Mount into place

11. Composition / Asphalt Roof 5. Drive lag bolt into rafter 6. Add EPDM rubber gasket 7. Attached preferred rails 8. Move onto the next…

12. Composition / Asphalt Roof Good Example of a Code-Compliant Solar Racking System

13. Wood Shake Roof Most shake roofs consist of interlaid felt paper for waterproofing The QM Shake Mount 18x18 flashing is designed to slip under the felt paper

14. Tile Roofs Good Example of a Code-Compliant Solar Racking System

15. Why Double Flashing? Tile roofs are waterproof at underlayment. A primary flashing at the underlayment level is critical.

16. Why Double Flashing? Tile roofs must be waterproof at underlayment level AND top tole level

17. Tile Roofs Good Example of a Code-Compliant Solar Racking System

18. The Best Insurance • The vital importance of the solar rooftop mounting system is often overlooked and undervalued. • Proper code compliance protects roof warranties and the installer’s liability. • Flashing is cheap insurance!!!

19.

20. Wheel of Accountability Source: www.quickmountpv.com

21. THANK YOU! Johan Alfsen International Training Manager (925) 687-6686 johan@quickmountpv.com tech@quickmountpv.com

Solar Roofing Best Practices_Dec.2010

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