Closed cell spray foam barndo concerns

[free07110]

Building a 30x50 metal building at the lake in Oklahoma. It will be closed cell spray foam directly to metal skin and then interior will be built like a house inside. Plan to get 3-5” open cell sprayed on top of 1” closed cell after interior framing and all rough in is completed. This will be the necessary R factor and really insulate the building.

This building will be occupied for only weekends in the lake season times and unoccupied the winter months so no HVAC running or any air flow. Should I be worried about condensation or anything else since it will be a “sealed envelope” and no venting in the building while unoccupied.

 

[lonestarky]

Consider looking at the you tube channel for r&r buildings up here near Rockford IL, very active. May be able to answer your question. Lots of vids on insulation. Helpful guys, may even answer your question if you ask them.

 

[karoc]

I have no personal experience but I would say that somehow humidity will find way in. Guessing when unoccupied during the week you will only set your stat say to 80* to help keep humidity under control. Plus keeping all trim, cabinets, doors and maybe wood floors from warping. Maybe get portable De-Humidifier for those winter days

 

[kj_mustang]

FYI, most studies I have read say that 1" of closed cell foam is not thick enough to make an air and vapor barrier. I would talk to some very experienced foam insulation people in that area.

 

[carmaniak]

Since there won't be any HVAC or airflow, you've got to be cautious.

Here's a friendly tip:

1. Vapor Barrier: Make sure you've got a good vapor barrier as part of your insulation. That'll help control moisture and prevent any unwanted condensation.
2. Dehumidifier: Think about getting a dehumidifier. Even if you're not around, it can work wonders in maintaining the right humidity levels and preventing moisture buildup.
3. Check-In: If you can swing it, drop by every now and then during the winter months to give things a quick once-over. It'll help you catch any potential issues early on.

With the right insulation and a little attention to moisture, you should be all set.