I've had my solar panels mounted on the Montana for 5 years now and I screwed them into the roof with no problems. I didn't hit any trusses. I put dicor under the feet of the panels first and then the screw and have not had any water intrusion either.
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Lenny and Ros
2012 Montana 3400RL,680 Watts Solar,4xT-105 Trojans,GP-ISW2000-12 Inverter,Trimetric 2020, EMSHW50C
2009 Chevy Silverado 3500 LTZ Duramax 4x4 CC Dually, Banks Speed Brake
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