Nailed into the surface paper

[Hälva]

What do you do now?
The carpenter has nailed down the roofing felt. Instead of the nail heads being under the felt/sealing edge, they are all visible from above.

He claims it will still be watertight. Can you trust that, or do I need to do something?

Apply roofing tar or redo the felt?

 

[Stefan N]

Would not have approved it if it is not explicitly stated in the assembly instructions.

 

[Dowser4711]

When I replaced my roof that had staples in exactly the same way, I had rot and needed to replace each row of the roof decking under the seams. So no, unless that is a special model specifically approved/recommended by the manufacturer, there is no reason to accept that.

 

[tttomten]

There is a risk that the nail may shift if it moves, so no, it is not okay.

 

[Hälva]

What do I need to do?
Add new tar paper on top or is it enough to apply roofing cement on the nails?

 

[Fotografen]

All assembly instructions I find mention hidden nailing, the next sheet should be glued over, so there I would probably say "Do It Again, Do It Right!" to that. Request reference to installation instructions from the manufacturer if someone claims that it works.

 

[Dowser4711]

What do I need to do?
Lay new felt on top or is it enough to apply roofing tar on the nails?

Only applying roofing tar on the nails is practically like just fixing a future hole with tar and hoping it won't get damaged by the nails over time. It will probably work for many of the nails, but there are many nails...

Follow the manufacturer's instructions on how to repair holes in the surface felt.

 

[Noramasen]

That "carpenter" might need to be nailed down himself in an appropriate way, with a follow-up question if that's good enough and feels right?
What a BLOCKHEAD!
Just tear it down and redo it depending on the circumstances.

 

[SueCia]

Accept no spackel solutions.. the ceiling should be done correctly otherwise you might as well have ignored it altogether.

 

[Tomtom79]

It's not just the surface paper that needs to be replaced after such a blunder. Both layers must be removed and replaced after the underlying surface has been carefully checked to ensure no nails are left without heads or other sharp objects after tearing it off. It's a hell of a job that needs to be done and they probably won't be happy, but unfortunately, that's how it is sometimes when the body is quicker than the brain.

I wouldn't accept adding another layer on top either, which might be the carpenter's easiest solution. You'll end up with even more ridges where water will stand, and a large number of nails with quite thick layers of paper underneath that flex when you walk on the roof, which can work through the next layer.

 

[Hälva]

After some back and forth, the roof was redone with new roofing felt. The carpenter redid it and did it right. (;