OSB board is fine for blinds if the outside is painted (buy returned ext latex at the box store) and the inside kept dry (buy windows....good windows...well sealed...easy and quiet to open) and a shingled roof (shingles rock!). Wind blocking of sheathing is what keeps the blind warm.....or hot....or slows drying of wet internal sheathing surfaces which leads to wood rot or foggy windows. So make them 'tight' (all joints) but put in a couple wire mesh covered vents under eave...the inside has to 'breathe'. Use subfloor or treated plywood for roof and floor. All other wood should be treated. Inner shelves can be non treated.
Coated OSB is about twice price of uncoated OSB.....but factory primed...and green!
http://www.homedepot.com/p/7-16-In-4-Ft-x-8-Ft-Huber-Zip-OSB-Wall-Sheathing-777198/202089190
Windows and shingles are everything to protecting the interior from excess moisture!
http://deerviewwindows.com/hinge-window-3/
Shingles....just regular shingles...tar and grit....bundles or rolls....frame roof edge and add aluminum edge trim too!
http://www.homedepot.com/s/shingles?NCNI-5
Just finished replacing a non-shingled roof on a old blind....with shingles it would have been just fine.....live and learn! We are building a new portable wood blind if some of you are interested in pics?
Figure the price and time required to build a blind....and a maintenance free time frame of 10-15 years. Then decide if a Redneck blind would suit you better?
Build or buy a platform....Redneck is steel. Again....all treated lumber....all joints tight and secure (3.5x10 stainless deck screws or galvanized nails, Liquid Nails subfloor glue, roofing staple zippers or galvanized framing plates).
Will the blind withstand 70+ mph winds? Sheathed walls are like a sail on a ship...amplifying wind force! All legs anchored to deck blocks with Red-Head anchors
http://www.homedepot.com/s/red+head+anchors?NCNI-5
30" ground anchor pounded and screwed a foot deep but lodged in rock. Where you want to put a blind may be very rocky....so find a big rock to supplant ground anchor.
http://www.tractorsupply.com/tsc/pr...earth-anchor-with-3-in-dia-auger?cm_vc=IOPDP1
So will it hold?