Another point is that i am planning on using a small woodburner in
there to heat the area,
plus heat up the glycol that i will be pumping into the floor.) I
wouldn't be so concerned
about fire safety except for this point.

I would prefer to do OSB for cost and ease of hanging anything
anywhere, and I have
read the several other posts about this topic, but there hasn't been
much discussion
about osb vs. drywall from a fire safety point of view.

Also, is there any code requirements about what to use in an attached
garage?

Any help would be appreciated.


How about Hardie Board siding? They come in 4x8 sheets in several patterns
and colors. Color-matched nails are available as well. It would be as easy
to install as the OSB, but a whole lot better looking. Probably twice as
expensive, though. And I would think their fire resistance would be much
higher than either OSB or sheetrock. They also make 4x8 sheets of soffit
that you could use in the ceiling.

Just something else to think about,

Charlie