kneedeep
Veteran Member
That is a good size for my needs as well. Mind if I ask how much $$?
That is a good size for my needs as well. Mind if I ask how much $$?
Hoping to have the barn insulated (R25 open-cell spray foam) by early March as long as everything goes well and we get a few warm days to spray.
View attachment 408437View attachment 408438
Fivepoint -
Very nice barn with the loft! On your open cell foam - is this a DIY or contracted out and are you doing the whole barn or select area?
Curious on the cost PSF and did you consider doing 1" spray and batt combination?
Leave the existing doors and put on the insulated overhead door too. It will look the same from the outside.
Leave the existing doors and put on the insulated overhead door too. It will look the same from the outside.
Thanks man - the open cell foam will be contracted out. It's a 55'x35' barn with a 12/12 roof pitch. My goal is to get to R30 on the ceiling and R20 on the walls. I've had everything from $22,000 for closed-cell to $8,500 for open cell quoted to me - decided to probably go with the $8500 open cell bid.
From what I'm hearing, the vapor barrier benefit of the closed-cell is really pointless when the open cell is sprayed as thick as we're planning. (tell me if this is wrong) This will be around 5.5" on the walls, and 7.5" on the ceiling. (haven't calculated the PSF)
Did not consider using batt - but I am considering using 1" hard foam next to the steel to prevent the spray foam from sticking to the steel (for easy replacement).
Biggest question remaining is how to do the door - best for insulation would be to replace the existing rolling doors with a high quality over head door - but it kind of ruins the aesthetic - so I'm not sure what we'll do.
That's a great price for open cell and @ 5.5" = R19 and 7.5 R26 - the open cell R value is 3.5/3.7" and closed cell near R6". I agree, at the price difference open cell will be fine. Open cell is not good for damp spaces or humid areas as it does not repel moisture it can absorb water faster due to the open cells.
On the hard foam, 1" in the roof area against the steel roof purlins then spray would give you an additional R6 or so in the roof. But with a life around 30-40 years for a metal roof unless a tree hits it I don't see much value in doing this. If you spray directly on the metal you don't let any air in - if you put a barrier in the walls/ceilings then this allows air in - I would speak with the insulating contractor for your area on this as they have local experience with condensation.
Did you insulate the foundation and put in a floor barrier before pouring concrete?
On the garage doors, I have old 1950's wood sliding passing doors on our garage and their are bristle brushes I looked into (but haven't done anything as it's an unheated space). I found a lot of good info here on garage journal Sealing a sliding barn door... - The Garage Journal Board.
Carl