I haven’t even finished by RV storage barn yet, and I am thinking about adding on. It is full already, (like I knew it would be). My original plan was to build a separate heated work shop, but now I don’t want to use up that yard space. (see edit below) Picture one is my barn as it is now. It is 32’ wide by 48’deep, 22’ tall, and 14’ sidewalls. (see edit below) Picture two is similar to what I would like to add on. Except the roof line will be the same on both barns. The addition will be 32’ X 32’. I will even have the ground level up to the second story just like the picture. I will not put vehicles in the second story like the old time farmer did to unload hay. I will use the second story for a wood working shop or possibly finish part of it for a guest house. My question is, pay someone to pour the back two walls or do ICF myself? How would you finish the inside walls of a heated basement garage with ICF? I don’t like using drywall in garages because it doesn’t hold up well with the extra moisture in a garage. Additionally drywall is not durable like plywood or a poured wall. If I had the walls poured I would just paint them. I live in northern Minnesota. Thanks in advance. Cody EDIT; I couldn't get my pictures to upload. You will have to go here to see the pictures http://tinypic.com/yourstuff.php BE WARNED, there are also pictures of scantily clad biker chick there also.

If you do go the icf route moisture won't be a problem. Looking at icf done by yourself, as mentioned, vs poured by others you'll be damn close in pricing. Just to give you an idea your looking at 4500to5000 material and cement.
Cheers!

It is not moisture from the outside I am worried about. When I drive the truck inside the garage and fire up the pressure washer to wash the salt off in the middle of winter the walls will get wet.

Ok I see your delima. There is a product that you see in newer barns which is a plywood covered w/ thin layer of plastic but costs an arm and a leg. There's always a tin covering that can be done or a bit of both. Tin would be fast and inexpensive but will require a wash to eliminate the salt.
Cheers!

I forgot about that stuff. I have seen is used in commercial kitchens. I could use it as waynes coat. Or use it 8 foot on end in the corner that I am planning on vehicle washing. Another material that I will consider is cement board. It is priced reasonably. Not sure if it is fire rate without drywall or title over it, but it is more fire resistant the wood or plywood.

I used corrugated sheet metal to cover ICFs in my own garage, I can pressure wash the walls no problem. And it looks good. Meets the 15 minute fire requirement too.

If only for a section, It's fast install and water resistance would be the best bang for the buck ,I think. Cement board could be something to look into. The plastic plywood usually offers trims to cap off the seams and wide enough to cover the edge screws. From what I've seen, it looks good. Personally I am going w/tin coering for my garage.
Cheers

A local home improvement chain sells a metal siding material designed for interior use. It looks just like the metal siding commonly used on metal buildings and would probably be perfect for covering the ICF in your "wash bay".

You could also use a synthetic stucco, like an EFIS coating on the inside, but the cost would be more than sheet metal.