I'm adding a solar panel which did not come with screws for attachment to the roof. I'm not replacing the 10w panel that's up there, so I have no screws to reuse.

Anyone added panels to the roof? What screws did you use?

TIA.

here is a thread about adding additional solar panel ... a personal message will most likely get you the information that you want ...

More solar

That's a good thread about adding solar panels, but it doesn't exactly address fasteners.

We have a 100 pound Motosat Datastorm (Satellite Internet) and a Motosat Executive TV dish (I installed the latter) on the roof and both are fastened with about #10 or #12 stainless steel sheet metal screws. What really provides the holding power is surface area of the aluminum bases and lots of Dicor between the mounting plate and the roof.

If your solar panel only has small mounting ears or tabs, you could add an aluminum plate to each mounting ear to provide more surface area for Dicor adhesion.

I have 3ea. 100W panels from AM Solar that are attached with Scotch VHB double sided tape. This stuff is touted as a replacement for rivets and screws. They're not kidding!

ua40j I just added a solar panel two weeks ago i used stainless steel sheet metal screws 3/4 or 1 inch cant remember sleep a day or two. Also used 3M 4200 marine calk. so far no leaks and the panel working.

Thank you all. I've got the solution.