shanedn OP t1_j5pi3yx wrote on January 24, 2023 at 5:45 PM

Reply to comment by ZealousidealPickle11 in Attic ventilation with spray foam insulation? by shanedn

Even with spray foam insulation under the roof deck? From everything google seems to say, you usually don't want ventilation:

https://www.google.com/search?q=spray+foam+insulation+attic+ventilation

However, I'm not the one who did the insulation or the venting, so I'm trying to find out if they broke the "rules" for a reason I can't think of.

Electronic-Being7258 t1_j5qnoon wrote on January 24, 2023 at 9:58 PM

I had a home that was insulated with a nonrigid foam. It was wonderful in the attic during all seasons. The attic becomes basically part of the interior of the home with comparable temperatures. No vents in the attic are necessary, but the HVAC system needs better humidity control and fresh air exchanger.

nobamanomore t1_j5r6233 wrote on January 24, 2023 at 11:59 PM

Please stop listening to these ignorant people that don’t know anything about spray foaming a roof almost all the information people are giving you is incorrect. Contact an experienced foam insulator in your area to come out and give you his opinion. I’m pretty sure I know the answers but I’m not going to speculate without seeing the entire house you need to make sure you don’t make any mistakes.