Roofless Roof: Difference between revisions
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A low cost roof which instead of using standard roofing, uses PV panels that have a gutter system making the PV panels function as a water-tight roof. The advantage is using building-integrated PV to provide the water-tightness function typically provided by a standard roof. This is done while avoiding the cost of the standard roofing material, at $4/sf cost [https://www.tkroofingandgutters.com/blog/how-much-does-a-roof-replacement-cost#:~:text=With%20that%20said%2C%20on%20average,replace%20an%20asphalt%20shingle%20roof.] This produces value in energy which pays back for the PV and roof cost in 2 years (2 year payback time for PV by value of electricity generated) - effective providing a free roof. The up-front cost is 2x that of standard roof (PV costs $8/sf [https://sunelec.com/solar-panels/]). | A low cost roof which instead of using standard roofing, uses PV panels that have a gutter system making the PV panels function as a water-tight roof. The advantage is using building-integrated PV to provide the water-tightness function typically provided by a standard roof. This is done while avoiding the cost of the standard roofing material, at $4/sf cost [https://www.tkroofingandgutters.com/blog/how-much-does-a-roof-replacement-cost#:~:text=With%20that%20said%2C%20on%20average,replace%20an%20asphalt%20shingle%20roof.] This produces value in energy which pays back for the PV and roof cost in 2 years (2 year payback time for PV by value of electricity generated) - effective providing a free roof. The up-front cost is 2x that of standard roof (PV costs $8/sf [https://sunelec.com/solar-panels/]). | ||
=2025= | |||
*[[FAST]] version - Dr. Pearce - https://www.mdpi.com/2411-9660/1/2/9#B30-designs-01-00009 | |||
=Requirements= | =Requirements= | ||
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[https://docs.google.com/presentation/d/196jJG4jptPGR30FsoB7-cjoGMzmrqgjaeesvcr6s1no/edit#slide=id.gb328b2d63d_0_9 edit] | [https://docs.google.com/presentation/d/196jJG4jptPGR30FsoB7-cjoGMzmrqgjaeesvcr6s1no/edit#slide=id.gb328b2d63d_0_9 edit] | ||
[[ | =Calc= | ||
*nxm grid has n-1 times m-1 crosses and 2 times n times m lines. | |||
*Ie, crosses are about the same as number of panels, lines are twice the panels | |||
*Per panel roofless roof gutter cost - half cross plus at $9 one 10' PVC pipe at $25 [Cellular Core DWV Schedule 40 PVC Pipe at Menards® [https://www.menards.com/main/plumbing/pipe-fittings/pvc-pipe-fittings/cellular-core-dwv-schedule-40-pvc-pipe/pvc044000600/p-1444426393930-c-8571.html] and Cellular Core DWV Schedule 40 PVC Pipe at Menards® [https://www.menards.com/main/plumbing/pipe-fittings/pvc-pipe-fittings/cellular-core-dwv-schedule-40-pvc-pipe/pvc044000600/p-1444426393930-c-8571.htm] | |||
[Solid Core Schedule 40 PVC Pressure Pipe at Menards® https://www.menards.com/main/plumbing/pipe-fittings/pvc-pipe-fittings/solid-core-schedule-40-pvc-pressure-pipe/pvc074000600/p-1444426396367-c-8571.htm] | |||
Latest revision as of 02:59, 9 October 2025
Concept
A low cost roof which instead of using standard roofing, uses PV panels that have a gutter system making the PV panels function as a water-tight roof. The advantage is using building-integrated PV to provide the water-tightness function typically provided by a standard roof. This is done while avoiding the cost of the standard roofing material, at $4/sf cost [1] This produces value in energy which pays back for the PV and roof cost in 2 years (2 year payback time for PV by value of electricity generated) - effective providing a free roof. The up-front cost is 2x that of standard roof (PV costs $8/sf [2]).
2025
- FAST version - Dr. Pearce - https://www.mdpi.com/2411-9660/1/2/9#B30-designs-01-00009
Requirements
- Water proof with PV
- Has allowance for temporary cover with any other material available, from sheet, mesh, flexible sheet, etc. Bamboo for temp shade.
- Fractal design: can be repaired in modules, doesn't require disassembly of surroundig modules to fix. To implement - think of rail - into which the flanges of PV insert.
From Architecture Part Library
Roofing detail for a 'roofless roof with solar panels', v2. - File:Roofless.fcstd.
Roofing detail for a 'roofless roof with solar panels'. v1. - File:Roofdete.fcstd.
Working Doc
Calc
- nxm grid has n-1 times m-1 crosses and 2 times n times m lines.
- Ie, crosses are about the same as number of panels, lines are twice the panels
- Per panel roofless roof gutter cost - half cross plus at $9 one 10' PVC pipe at $25 [Cellular Core DWV Schedule 40 PVC Pipe at Menards® [3] and Cellular Core DWV Schedule 40 PVC Pipe at Menards® [4]
[Solid Core Schedule 40 PVC Pressure Pipe at Menards® https://www.menards.com/main/plumbing/pipe-fittings/pvc-pipe-fittings/solid-core-schedule-40-pvc-pressure-pipe/pvc074000600/p-1444426396367-c-8571.htm]