Housewrap for garage + longer term exposure – GreenBuildingAdvisor

Hello, I’m trying to work through a plan for my garage and sealing it up. The previous owner built somewhat of a frankensteins monster with a garage that then had a loft added, then overhangs onto each of 3 of the 4 sides. The garage portion is fully insulated in the walls and ceiling with fiberglass insulation, the sheathing on the garage portion is 1×6 rough cut planks made from lumber he milled himself. The building is on a cement slab.

I’m in the process of working through a plan to seal this building up more and protect it from the elements. There currently is no siding at all on the building, with the lower being the 1×6 planks, and the upper loft built on top being sheathed with OSB. From looking at pictures it seems like the building has been unsheathed for at least 20 years. Because this building is in the deep woods with tall trees on most sides it doesn’t really get much of any sun on the sheathing, and with the overhangs all around there is no rain or water getting to any of the sheathing either.

For exterior siding I’m doing a lower skirt of metal all around (porcupine prevention) and then under the overhangs sanded plywood (so I can mount racking through the plywood into the 2×6 stud framing of the garage).

The garage isn’t heated, but the insulation does keep the temperature swings more manageable in fall and spring, but in all honesty with the garage door opening I’m not sure how worth it is chasing being airtight since all the air changes really quickly with the door opening and closing, so moisture control is maybe not really a priority.

My main question is about looking for a housewrap that can potentially live for quite some time exposed since this project will probably take over a year to finish and will happen in stages. There won’t be any direct water exposure as no rain gets to the wall surfaces, and there isn’t direct UV exposure as sun never hits the walls, but there is indirect UV exposure. I found this thread mentioning Tyvek Commercial as a very strong and durable housewrap and am wondering if 5-6 years later it’s still the best/most economical option

Strongest housewraps

EDIT: One last point or question was to the eco/safety of some of the housewraps like Tyvek. Most everything I’m building on the property I’ve aimed to avoid plastics and PFAS or similar chemicals where possible. But this made me wonder about Tyvek and if it had PFAS in it, in which case I probably would want to look for an alternative.