Yes, I normally buy whatever is closest to the length I need then have an associate cut them down to what I need. I like the way they do this it's really convenient and handy to have them cut down to what I need so they will fit in my car.
Yes as long as they are sealed properly to withstand the elements. I would prefer something wider but everyone is different.
No the store only cuts straight angle cuts. I just usually ask for my boards to be cut to size then I take them home to cut the angles I need.
I would use cedar instead of these, these are not treated for the elements.
These are not that sturdy for slats maybe something thicker would help.
Yes, just ask an associate at the store.
i would not recommend these for shelving, their primary use is for installing vinyl siding.
I sometimes order my materials online but inspect them once at the store to be on the safe side. I exchange out if I get some bad boards. Not a problem.
These can as long as you have the proper equipment. I suggest painting and sealing them if used on the exterior.
This comes in other lengths but can be cut down to size once you go to pick it up.