By up, over and down I assume that you mean he created an upside down u (or an n) with the vent pipes. If so, this is wrong. It will trap rain water and condensate in the section that goes up and through the roof.


BTW....

I always write up those cheap pull down stairs as low quality and caution the client about relying on them to enter/exit the attic safely. I also list them as a breach of the fire separation between the home and garage if installed in the garage, unless provisions have been made to resist fire.

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Integrity Inspection Service, LLC
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