Skylight vs. Window in Bathroom- Which is the Lesser of Two Evils.
We are converting a narrow, long closet into a bathroom that will have a shower at the end which is an exterior wall (north exposure). As this will be the main bathroom for all the upstairs bedrooms, there is a high desire to have natural light. Our options are to either put a window in the shower or a skylight over it.
The window presents the problem of both sides needing to be water resistant. So I wonder, are both interior an exterior sills sloped along with the underlying pans and not sealed? Is there a back-dam dead center or none? For the interior, will the exterior tapes or fluid applied solutions be compatible with the shower systems (Schluter)?
As for the skylight, well it’s a big hole in the roof and any penetration there makes me nervous, especially a retrofit one. Should there be special conditions to ensure the best waterproofing if we go this route instead. I feel confident in water proofing windows (at least on the exterior), but I’m not as familiar with the best practices on skylights.
Putting aside the waterproofing durability concerns, I would imagine that the skylight is a less favorable option from an energy perspective as well.
So which route would you choose and what would you do to ensure the best durability and energy efficiency?
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