I am building this in parts and primarily on weekends. I’ve got the insulation in and OSB floor should be in next week.

I will then staple on a waterproof membrane. That feels like a milestone as it’s then protected from the rain. Phase 1 in my plan!
I then want to build the 3 walls and line with OSB and breathable membrane. I assume they are good to stand in the rain too? But I feel they won’t be very sturdy without the front wall and roof joists holding everything together. I can’t do the front wall yet as I am still looking for a second hand French door and am unsure on the measurements.
Can I get some advice on how I can continue making progress and not be hampered by the weather.

I will then staple on a waterproof membrane. That feels like a milestone as it’s then protected from the rain. Phase 1 in my plan!
I then want to build the 3 walls and line with OSB and breathable membrane. I assume they are good to stand in the rain too? But I feel they won’t be very sturdy without the front wall and roof joists holding everything together. I can’t do the front wall yet as I am still looking for a second hand French door and am unsure on the measurements.
Can I get some advice on how I can continue making progress and not be hampered by the weather.
