Shed doors

Hi,
Made a small shed using Smart siding. I made the doors from SmartSide but have not added the hinges or trim yet. I noticed that many builders simply add the 3/4" primed trim over the outside of the siding door using staples from the inside. The primed trim they sell at the home center in my case looks to be redwood or some other very soft wood.

The problem with this IMO is twofold-

1. I don't think the hinges will hold well in the softwood over time
2. I don't have my shed HW kit from the Shed Windows Company yet but I think the hinge screws are 1&1/2" and thus will protrude from 3/4" + 1/2" siding. I have seen some builders cut off the protrusion with a grinder which is OK.

What's a good solution? I'm thinking of gluing/screwing a strip of 3/4" ply on the inside where the hinges are.
On the Lowes site I can see where the Smartside shed door has 2x4" framing on the inside but this seems to be a bit of overkill.

My doors are each about 32" wide (double door).

Thanks

 

How are the doors built? 2x frame covered with siding?

 

The first thing that is going to fail on a shed is the door, so there's no such thing as over building one..
Most often I try and use 1 X 4 PVC lumber for all the trim, and thru bolt the hinges.
If you rip the header trim and the middle and bottom stiles at the top at a slight angle water will run off instead of laying on top and getting in behind the trim and rotting it out.