Colleagues:
I have a long-time PV client with a metal roof. This is the type of roofing with trapezoidal ridges every 12 inches. Over the years we have installed three phases of solar on this roofing. We original caulked DPW feet onto the roof with fasteners into the framing. Later we used DPW EZ-feet with the included butyl tape. The client informed me that have had minor roof leaks due to failure of the fasteners. To quote: “Unfortunately I chose the less expensive version of the roofing, way back then. It has “exposed fasteners”, the screws and washers are working loose.” (No one has claimed our attachments are leaking but you can bet I will be looking at them closely.) This is the first time I have ever heard of this type of failure. Have any of you experienced this? Can you offer any explanation on what caused this and how you dealt with it? I would be very grateful. It seems to me that replacing the fasteners would invite stripping of the threading into the wood sheeting. Thanks in advance, William William Miller Miller Solar www.millersolar.com CA License C-10 77398
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