Hi there, We bought a 1978 tri-level in Seattle in April. It has 2 old school skylights, one above the stairs to the top floor and one in my son's room (also on the top floor). That skylight goes through the top attic whereas, I believe the one above the stairs goes straight into the roof. I know the one in my son's room leaks (we haven't observed it, but there is some water damage. Our home inspector said they needed to be sealed/properly framed out in our inspection report. I was wondering if anyone knew if it was possible to convert these to solar tubes. The issue is that the largest solar tube I have found online was 21". The skylights are 21" square, but for that I would need an approximately 28" circle. Is it possible to patch that spot on the roof and then do a circular opening of an appropriate size, or should I just try to reseal/update these uber-dated skylights?

So I figured I'd ask a little about this before I go buy it and start slappin it up on a bunch of windows. I continue to overestimate my DIY skills. We've decided to restore instead of replace our windows.... Is there a specific process that MUST be followed ?? or can I fix big problem areas like the wood falling apart first and then go back at some point and add the weather stripping? Anyway this polyester wood filler is a relatively easy process? Thank you SO much!!