If they ever leak, can you remove the frame from the housing and replace/repair it without disturbing the roof? A roofing contractor is pointing out that they will eventually leak, and it would be a good idea to replace them along with the roof. I have no doubt about them eventually leaking, but wonder if it could be fixed without disturbing the roof. I think he is trying to pull a CYA at the customer's expense or just running up the bill.

I have 2 other quotes on the roof and the contractors didn't say anything about the skylights. There are 8 of them for a total of $4,800.

I think this guy is trying to run up the bill, and as you suggest CYA in case there's a problem with his installation. Most skylight leaks aren't due to a faulty skylight, but rather to a bad installation of the unit or the flashing around it. I just replaced the roof on my house, which has 6 skylights, all about 13 years old, and none of the guys who gave me an estimate mentioned any possible leak issue. This was last fall, and so far they still work great.

If you eventually do need to replace the skylight, some relatively minor disturbance of the roof is required - as the flashing around the skylight extends out several inches under the surrounding shingles. So you would have to pull back all the shingles around the skylight during removal and replacement. Not a huge deal, especially if you have a typical asphalt shingle roof. If you have something more exotic (slate?) it may be a little more complicated. So unless you have a problem with the skylights now, I wouldn't change them out.

Hey labman, pella has flashing kits for those and as far as fixing leaks you would have to pull up some shingles ,but this is not a major job here at all. To fix one it may take 35 to 45 minutes to do. That's a carpenter doing it, if I was a roofer id hope to do better than that, it does sound as if he's trying to add a little work on here,

As far as the others not mentioning it, they may have noticed it but just felt like it wasn't an issue right now. I feel that your roofer may be a little shady, id wonder also if you don't do it like he's asking to. If after he's gone a leak might apear. If it does you know he'll bring this back up and charge you more,
Be careful. Id ask the other roofers if they noticed anything, but id becareful with anyone who wants to fix something that's not broke,
Something's like rooten wood I can see , but to fix things because one day they might leak is another.

Has anybody read the question? I am not talking about leaks around the skylight, but the skylight leaking between the glass and frame. Can that frame be removed without removing the housing anchored in the roof

Yes I read that . All the ones I've replaced, regardless of where the leak is, whether it's the flashing or seal. We replace the hole thing. I don't know your model of pella skylight it may have a detachable face to it, but I've not seen one

If it isn't detachable I don't see a way to do that without removing shingles, but if done correctly the shingles can be put right back