Hi – following up on an earlier post re skylights, I’m trying to understand the code requirements for glazing of skylights over shafts and stairwells. The code reads “(2) GLAZING. –
a. Skylights over stairways and shafts. – Skylights
placed over stairways and shafts shall be glazed with
plain glass not more than one-eighth inch thick or
unreinforced plastic not more than three-sixteenths of
an inch thick.”.

I have two single-pane pyramid skylights there and want to replace them ideally with fixed, flat double-paned glass ones. The original venting uses are probably not as important anymore, but I don’t understand whether the code prohibits the installation of those ones. Can anyone help me understand what’s allowed? Thanks


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  1. Followup: went to see the guys at superior tinsmith and they told me that according to code, youi can only use the pyramid skylight. Venting is required if that is the only way the area could get fresh air (as well as venting the ‘cock-loft’). Thanks again for all your input!

  2. Thanks Pig Three and Masterbuilder! I will check out the tinsmith guys when I get the chance. Also, Pig Three – I agree with the wired glass comment. All the ones I have seen (my neighbors, etc.) are all wired. Surely that can’t be against code. I pulled that directly from the dept of buildings website…

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