Outdoor Backyard Climbing Wall

In my backyard, we have a 1 room disconnected office building, and we have been considering the idea of building a climbing wall on the outside of it. I have never built a climbing wall before, but I have a pretty good sense of what needs to be done. My plan so far has been to screw 2x4's into the studs of the wall, and then screw plywood with t-bolts into those 2x4's. I was also planning on setting the 2x4's into cement on the ground so there is not as much stress on the wall of the building. It's about a 20 foot tall wall, and is also in direct sunlight, and can get hot during summer. I am not planning on any overhangs, Just a vertical wall. Does anybody know anything about building outdoor climbing walls on the sides of buildings? Will the sunlight damage the holds?
     
                                                                                            Thanks.

Edit: Also, if anybody knows of any good climbing holds for outdoor use I would love to know the brand/model. Think UV and rain protection.

You probably want to add a little roof to shelter the wall. The UV exposure may affect the holds given enough exposure, but I’d be more concerned about the plywood and moisture exposure tbh. 

This sounds like a solid plan but you’ll want something (maybe just a tarp) to keep the structure from getting wet and rotting 

Ok Thanks. I was also thinking of a way that I could take off the plywood during the winter, as well as treating the plywood to be more weather resistant, or like brian mentioned above, a tarp cover.