Solar pv - slates being drilled through to install

[pirate]

Except that those screws are not long enough...

 

[swaRRR]

Except that those screws are not long enough...

If they've missed it's likely there's at least another 10-30mm of play roof-side, seen it loads of times especially on side flashing, looks like they're home but when you go to 'tighten' up the screw there's loads of depth left on them where they've not been done properly.

That said i'd want at least another 30mm in those rafters. Never underestimate the ability of a roofer to miss a rafter. Seems to be a national sport.