Solar Roofing Best Practices_Dec.2010

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

Problems in the Industry: - Disconnect between Solar & Roofing Industry - Voided Roof Warranties - No Regulation - Outdated Technology - Cost/Competition - Lack of Training

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 2008It 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 manufacturersspecifications.

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 Roof1. Lift composite tile and clear nails 2. Drill ¼” pilot hole for lag bolt3. Add roof sealant to pilot hole 4. Slide Quick Mount into place

Composition / Asphalt Roof5. Drive lag bolt into rafter 6. Add EPDM rubber gasket7. Attached preferred rails 8. Move onto the next…

Composition / Asphalt RoofGood Example of a Code-Compliant Solar Racking System

Wood Shake RoofMost shake roofs consist of interlaid felt paperfor waterproofingThe QM Shake Mount 18x18 flashing isdesigned to slip under the felt paper

Tile RoofsGood Example of a Code-Compliant Solar Racking System

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

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

Tile RoofsGood Example of a Code-Compliant Solar Racking System

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!!!

Wheel of Accountability Source: www.quickmountpv.com

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

Solar Roofing Best Practices_Dec.2010

by California Center for Sustainable Energy on Dec 09, 2010

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Solar Roofing Best Practices_Dec.2010 — Presentation Transcript