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Where the optimal tilt angle for PV panels is 30°, if the roof is facing due south, the tilt angle (roof pitch) can vary 0° to 60° or roof direction can vary up to 65° to east or west and the roof can still collect 90% to 100% of available solar energy.

Where the optimal tilt angle for PV panels is 30°, if the roof is facing due south, the tilt angle (roof pitch) can vary 0° to 60° or roof direction can vary up to 65° to east or west and the roof can still collect 90% to 100% of available solar energy.
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Which roof shape best stands up to the fiercest gale?

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Why A Sealed FORTIFIED Roof

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Wildfire: Prevent Home Ignition P.1

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Wildfire: Prevent Home Ignition P.2

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Wildfire! Preventing Home Ignitions

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Wind path and uplift force for a gabled roof, a hip roof, and a pyramidal (another variant of a hip) roof design

Wind path and uplift force for a gabled roof, a hip roof, and a pyramidal (another variant of a hip) roof design
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Wind path and uplift force for gable ended roof, hip roof, and pyramidal (another variant of a hip) roofs

Wind path and uplift force for gable ended roof, hip roof, and pyramidal (another variant of a hip) roofs
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Wind Resistant Roof Systems

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Wind Resistant Roof Types

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Wind uplift pressures on gable end overhang with ladder framing

Wind uplift pressures on gable end overhang with ladder framing
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Wood blocking for future PV panel installation is installed in the layers of polyisocyanurate rigid foam insulation during a flat roof retrofit

Wood blocking for future PV panel installation is installed in the layers of polyisocyanurate rigid foam insulation during a flat roof retrofit
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World's Whitest Paint: radiative cooling helps to fight climate change

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Wrong - An open eave with no soffit covering can trap rising hot air and embers from a wildfire.

Wrong - An open eave with no soffit covering can trap rising hot air and embers from a wildfire.
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Wrong - Debris in these open gutters can ignite from wind-borne embers and lead to ignition of the roof or fascia board; use leaf screens to keep debris out of gutters in wildfire-prone areas.

Wrong - Debris in these open gutters can ignite from wind-borne embers and lead to ignition of the roof or fascia board; use leaf screens to keep debris out of gutters in wildfire-prone areas.
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Wrong - Displaced concrete tiles can allow ember entry.

Wrong - Displaced concrete tiles can allow ember entry.
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Wrong - Exhaust pipe is not vertical; poorly installed roofing; roofing odd placement for gable vent.

Wrong - Exhaust pipe is not vertical; poorly installed roofing; roofing odd placement for gable vent.
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Wrong - Flue pipe was poorly flashed at roof.

Wrong - Flue pipe was poorly flashed at roof.
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Wrong - House wrap was not properly cut and adhered where the roof meets the wall so water is likely to get behind the house wrap.

Wrong - House wrap was not properly cut and adhered where the roof meets the wall so water is likely to get behind the house wrap.
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Wrong - House wrap was poorly cut at wall interface and not taped leaving wood exposed and vulnerable to water entry.

Wrong - House wrap was poorly cut at wall interface and not taped leaving wood exposed and vulnerable to water entry.
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Wrong - If the soffit is applied directly to the rafter eave, it forms a sloping soffit, which creates a pocket that can trap hot air and embers from a wildfire.

Wrong - If the soffit is applied directly to the rafter eave, it forms a sloping soffit, which creates a pocket that can trap hot air and embers from a wildfire.
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Wrong - Ladder framing method for a gable overhang offers low resistance to wind uplift.

Wrong - Ladder framing method for a gable overhang offers low resistance to wind uplift.
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Wrong - Metal flashing should be used at wall-to-roof junctions.

Wrong - Metal flashing should be used at wall-to-roof junctions.
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Wrong - No metal drip edge is visible and asphalt shingles hang down too far.

Wrong - No metal drip edge is visible and asphalt shingles hang down too far.