White staining and welding on leadwork

[Great_scot_selfbuild]

The roofers have just finished welding the lead flashing; I've 2 questions:

 

1. How do I clean off the white staining? (the flashing on the garage rooflights hasn't had this appear).

2. They've only welded the folds at the corners. Should I expect (or ask for the vertical mid-section overlaps to be welded?

 

[Mr Punter]

Well I could not view the image or the vid, but you need to put patination oil on lead to prevent the oxidizing.

[stu w]

As said,  clean off if necessary with some white vinegar, then coat with patination oil 

[torre]

The vertical overlap looks okay to me, to allow for expansion.

Was that lead fresh off a roll? The white staining can be cleaned off as mentioned and patination oil applied but I'd expect the roofers to have done this as part of the job

[Nickfromwales]

19 minutes ago, torre said:

I'd expect the roofers to have done this as part of the job

And herein lies the problem folks.

 

If they think they can pas the buck, or dodge a bullet, well......... However, if it's entered in early as a part of the remit, then they know they have to do it or not get paid.