Do I need to use a washer with the screws?

Yes, Use at least a 1/2" non-conductive EPDM bonded washer. It is okay to use a larger washer. (Minimum outside diameter of washer needs to be 1/2".)  We offer two different washers the bubble washer and the neoprene washer. The bubble washer is slightly larger and is visible from the bottom of the roof but may be more resistant over time.  Visit this link to compare Washers.


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