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I'm a roofer/carpenter btw, and most homeowners know absolutely nothing about how their home works.
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I went back through the thread to find Permalink #18 as your referent.
Asphalt roofing costs US$4-7 while the non-solar Tesla tiles cost $11. Considering the service life and airborne debris penetration resistance, why would the homeowner be considering asphalt.
This may change, Tesla have introduced a v3 roof that uses horizontal arrays instead of the vertical tiling system they had previously. Cost for the solar part is reduced as well.