top tips for mounting on tile, asphalt and metal roofs
TRANSCRIPT
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Top Tips For Mounting On Tile, Asphalt and Metal Roofs
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q This webinar will be available afterwards at solarpowerworldonline.com & email
q Q&A at the end of the presentation q Hashtag for this webinar: #SolarWebinar
Before We Start
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Steven Bushong Solar Power World Moderator
Top Tips For Mounting On Tile, Asphalt and Metal Roofs
Meet your presenters…
Headshot 216x200
Cliff Shrock Senior Engineer SunModo
Brandon Gwinner Account Executive SunModo
Brian Stearns President/Founder EcoFasten Solar
Dan Felix IronRidge IR Training Manager
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C o m m i t t e d t o t h e c o n n e c t i o n
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Best Mounting Practices – Tile Roofs
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Tile roofing consists of 3 common elements:
Tile Roofing Overview
1. Tiles: Various profiles – Flat, W, S, Mission
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Tile roofing consists of 3 common elements:
Tile Roofing Overview
2. Battens: Attachment points for tiles
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Tile roofing consists of 3 common elements:
Tile Roofing Overview
3. Underlayment on sheathing (post-1986, per code)
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What to look for before you install?
What type of Tile?
Your mounting/flashing solution will be specific to Tile type.
Flat W profile S profile
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What to look for before you install?
Condition of the Tile:
Pests
Gnawing and added moisture can degrade materials rapidly, causing structural or waterproofing failure
Tile roofs present an ideal home for bats, squirrels, rats, wasps, etc….
Damage from Past Work Dropped tools or standing the wrong way can break and crack tiles.
Damaged tiles should be replaced before installing a PV system. Solar mounting solutions that replace a tile with flashing are a great source for replacement tiles.
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What to look for before you install? Condition of the Underlayment
15# / 30# / 40# asphalt-impregnated felt, modified bitumen, or plastic/synthetic fabrication
Capillary action and saturated tile can cause moisture at underside of tile
Wind-driven rain can also find its way up and under tile
Look for mold, curling of the underlayment and cracking. These would be signs of a leak or the need to reroof.
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What to look for before you install?
Roof Construction:
Does the underlayment/sheathing or battens require repairs? What is the spacing between battens? – important if using a metal
flashing at roof deck on a retrofit. What is the rafter spacing?
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PV on Tile Installation
Mounting Options for Tile:
Flashing Systems
that Replace a Tile Tile Hooks Hanger Bolt
Assemblies Standoffs that
Require Drilling or Cutting Tile
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Mounting Option Considerations
In the past:
Cutting or boring tiles to flash a standoff
Tile hooks- Weak attachments (lever arm) can deflect and break tile under loads, providing a direct path to solar attachment for moisture, pests, etc….
Both methods usually involve “bibbing” or mastic & metal flashing at the roof underlayment, with metal boot flashing at tile surface
New Innovations: New products that are less labor intensive, with less tooling and no messy mastic
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PV on Tile Installation- Considerations
Follow the Determined Array Layout • Will be determined by structural
engineer and approved by Authority Having Jurisdiction (AHJ).
• Always install mounts into Rafters. Predrill holes into center of rafter for Lag bolts.
Rafter
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PV on Tile Installation- Considerations
The Tile Roofing Institute (TRI) recommends flashing/seal at the roof deck and at the tile level
Flashings should be tested to: • UL 441 Section 25-Flashing
Standard for Gas Vents (closest standard for PV attachments)
• ICC-ES AC 286 § 4.1
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PV on Tile Installation- Considerations
Mission (clay) or lightweight tile
Fragile, not ideal to install over due to due breakage of tile
Strip & go method: Removal of tiles – replace with asphalt shingles under array location
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PV on Tile Installation- Considerations
Minimizing additional weight
Tile is heavy – minimizing additional weight on the roof, and gaining approval from a structural engineer will ensure structural integrity
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PV on Tile Installation- Considerations
Time on the roof
Even the strongest types of tile can be brittle
Spend as little time on the roof as possible to minimize chance of dropping tools or standing the wrong way
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EcoFasten Solar designs, engineers, and manufactures patented, watertight solar roof mounts designed with the installer in mind.
About EcoFasten Solar
Solutions for all roof types, including: • Tile Flashing System
GreenFasten • QuikFoot • Simple Seal • CorruSlide
Tile Roofing
Composition Shingle
Metal Roofing Corrugated Metal Roofing
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Flashing Installation Best Practices
Comp Shingle Roofs
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The First Question:
“How do I attach solar to the roof?”
…so that it doesn’t damage the home, …doesn’t fly off during a storm,
…and doesn’t cost an arm & a leg?
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In the Pioneers Days of Solar…
“Goop & A Prayer”
• Did not meet code • Voided roof warranty • High risk of leaks & liability
Tens of penetra,ons on each install add up to thousands of poten-al leaks within warranty.
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As We Grow, We Learn
• IBC 1503.2 o Flashing shall be installed in such a manner so as
to prevent moisture entering […] penetrations through the roof plane.
• IBC 1507.2.9 o Flashing shall be applied in accordance with this section
and the asphalt shingle manufacturer's printed instructions.
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Lot of Flashing Options Definition: Flashing – a strip of metal used to stop water from penetrating the junction of a roof with another surface.
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Key Factors
ü Waterproofing
ü Corrosion resistance
ü Structural performance
ü Ease of installation
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Waterproofing
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Seal Design Watertight & Long-lasting
• Elevation & compression • Shielding from elements
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Width & Elevation
Features to ensure water flows away from penetration
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Flashing Width
8” Minimum Width No Margin for Error
12” Extra-wide Flashing Protection from missed pilot holes
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Width & Elevation
• Thick asphalt shingles are pa@erned • Creates “highs & lows” that are problematic for
most flashings
Highs Lows
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Width & Elevation Lows
û ü
Wind-‐‑driven Rain
Proud flashing protects low penetration points
Flat flashing can deflect and expose low penetration points
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Width & Elevation Highs
ü Wide flashing traps water within low areas û Narrow flashing can expose high penetration points
Wind-‐‑driven Rain
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Corrosion Resistance
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• IBC 1503.2.1
Where flashing is of metal, the metal shall be corrosion resistant with a thickness of not less than 0.019 inch (0.483 mm) (No. 26 galvanized sheet).
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Material Selection
Steel flashings can rust. Aluminum will not.
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Structural Performance
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Zone 1
Zone 2
1
Design Loads
Wind Speed Zone 1 Zone 285 140 28790 159 325100 203 408110 251 500120 305 600130 362 710140 425 828150 492 955
Uplift (lbs.)
Manufacturer #3 Manufacture #2
Manufacture #1
Design Factors: • Code version: ASCE 7-‐‑05 or 7-‐‑10 • Location Info (wind/snow, exposure, etc.) • Building info (height, slope, etc.) • AMachment Spacing & placement
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Load Directions
SOLAR IS NOT FLAT
A@achment points experience both vertical and lateral forces.
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Engineering Certifications • Structural Engineering Report
o Per ASTM D 1761
• IAPMO-ES Evaluation Report o Per IBC & IRC (2006 & 2009)
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Installation
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Layout Attachment Locations • Mark rafters and a@achment Locations • Drill ¼” Pilot Holes, 3.5” deep. Verify being Centered on the Rafters
Min 3” to 3.25”
Pilot drill hole locations
Rafter Locations
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Use a Sealant Approved by Roofing Manufacture
Insert Sealant into pilot holes
EverGuard® Caulk FillGard M Pourable Sealer TAM-‐‑Seal Roof Patch
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Proper Placement
Incorrect with flashing hanging over
the shingle edge line
Correct With flashing 1/8”
above the shingle edge line
Acceptable With flashing
trimmed into the next course
Trim shingle Not under 3rd
Course of shingles
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• IBC 1507.2.7 Asphalt shingles shall have the minimum number of fasteners required by the manufacturer.
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Nailing Pattern
Shingle strips are staggered and overlapping.
Nailing Strip
Overlay area
Sawtooth Pa@ern
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Flashing Insertion
Nail locations may block flashing.
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Solving the Blockage
1. Mark depth of blockage 2. Pivot to determine horizontal location
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Notch Flashing
Use tin snips to notch the flashing.
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IronRidge FlashFoot 1. Insert & Align Install guides on flashing make it easy to line-‐‑up with pilot hole
2. Install L-‐‑foot & lag bolt L-‐‑foot, lag bolt and flashing come together all at once
3. AMach and Level Rail is simply dropped into open-‐‑top L-‐‑feet
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Mounting Solar on Metal Roofs
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Mounting Solar on Metal Roofs
OVERVIEW: Mounting methods for mounting solar electric systems on various types of metal roofs. AGENDA:
1. Metal roof type variety: metal barn type roof sheeting, standing seam roofs, and Q deck steel roofs encountered in commercial buildings. (Cliff)
2. Underlying structures: wood trusses, wood skip sheeting, steel trusses. (Cliff) 3. Options and limitations of mounting to the afore mentioned types of roof. 4. Techniques for fastening to such roofs. (Cliff) 5. Role of a Structural Engineer in designing such systems and selecting the fasteners for metal
roofs. (Cliff) 6. Samples of PV mounts and fasteners that might be used for various roofs. (Brandon)
- Best Practices -
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Many Types of Metal Roofs Barn Roof
Standing Seam
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Some would say a million types
Rolled & Corrugated Metal Roofing
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Under roof uses E-W wood purlins
Roof build up with steel or wood rafters and E-W wood purlins for barn roof, standing seam, or corrugated roof.
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Standing Seam Mount only as strong as the connection to the roof
• Cut-away of standing seam roof showing clips used to connect to roof sheathing.
• On new construction, clips every 24 inches or less.
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Seam Clamps used on Standing Seam Roof
Seams are top flange and seam clamps are mounted at 90 deg. angle to seam. Rails mounted to clamps using L feet.
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Standing Seam Mounting
Completed project showing the use of a standing seam clamp and E-W rails for PV Panel mounting.
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Many Seam Types
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Many Standing Seam Forms
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Standing Seam Clamp Choices
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Standing Seam Clamp Choices
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Standing Seam Clamp Choices
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Snap Seam
Seam is difficult to clamp onto.
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Special Seam Clamp
Odd seam type has special clamp style.
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Other special seam clamp
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Reverse Seam Deck
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Loading panels onto SS Roof Mounting of panels on Standing Seam Roof using seam clamps and E-W rails.
![Page 74: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/74.jpg)
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Standing Seam Mount Direct
Horse arena PV using direct mount S-5 seam clamps.
![Page 75: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/75.jpg)
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Various Metal Barn Roof Profiles
![Page 76: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/76.jpg)
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Insulated Barn Roof
Must be careful not to crush roofing.
![Page 77: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/77.jpg)
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New metal barn roofing on cabin structure with E-W purlins over wood rafters.
New Barn Roof
![Page 78: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/78.jpg)
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Retrofit of Barn Roof
Metal barn roof retrofit on house using E-W 2 by 4 wood purlins attached to old shingle roof.
![Page 79: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/79.jpg)
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Self-drilling Screw Options
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![Page 82: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/82.jpg)
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SunModo EZ Metal Roof Mounts with integral water sealing washer in base.
![Page 83: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/83.jpg)
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EZ Metal Roof Mount Water seal washer built into base of unit
![Page 84: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/84.jpg)
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Initial installation of EZ Roof Mounts with L foot thru roof to E-W wood purlins, then N-S rails.
Barn Roof mounted PV using EZ Metal Roof Mounts
![Page 86: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/86.jpg)
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Close up of Barn Roof Mtg.
Close up view during panel mounting showing the roof mount, L foot and wire dressing prior to mounting the PV panel.
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Barn Roof mounted PV using EZ Metal Roof Mounts
Completed installation on Barn Roof using EZ Metal Roof Mounts and N-S rails.
![Page 88: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/88.jpg)
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![Page 89: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/89.jpg)
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Alternate to Standing Seam Mounting
Standing seam roof but using EZ Metal roof mounts with stanchion and L foot, E-W rails.
![Page 90: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/90.jpg)
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![Page 91: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/91.jpg)
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EZ Corrugated Roof Mount
Penetration on top of ridges to avoid water ingress
![Page 92: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/92.jpg)
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Alternative corrugated roof mount.
![Page 93: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/93.jpg)
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Example of Corrugated Roof using Strut and Rail
Strut is fastened N-S on ridges of corrugation, then rails are mounted using L feet on E-W orientation.
![Page 94: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/94.jpg)
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Beautiful example of PV on barn roof using EZ Metal roof mounts.
![Page 95: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/95.jpg)
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![Page 96: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/96.jpg)
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![Page 97: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/97.jpg)
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Short Summary • Many metal roof types
o Standing Seam o Barn Roof (Roll Roof) o Corrugated Roof o Other; metal shingles, custom metal
• Many Under-roof systems o Wood Purlin o Steel Z and C purlin o Steel frame and Q deck
![Page 98: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/98.jpg)
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Steven Bushong Solar Power World Moderator [email protected]
Top Tips For Mounting On Tile, Asphalt and Metal Roofs
Questions?
Cliff Shrock Senior Engineer SunModo [email protected]
Brandon Gwinner Account Executive SunModo [email protected]
Brian Stearns President/Founder EcoFasten Solar [email protected]
Dan Felix IronRidge IR Training Manager [email protected]
![Page 99: Top tips for mounting on tile, asphalt and metal roofs](https://reader033.vdocument.in/reader033/viewer/2022042615/55c318a8bb61eb7e628b46ee/html5/thumbnails/99.jpg)
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Thank You q This webinar will be available at
solarpowerworldonline.com & email
q Tweet with hashtag #SolarWebinar
q Connect with Solar Power World
q Discuss this on EngineeringExchange.com