Another way to provide a wind break is to stack straw bales to block the wind.
I live in the land of wind.... LOL. and get about seventy two hours worth of snow so have used tarps now for about ten years. They last about a season and have to be replaced.... you are right not only do you have to provide structural support for the snow load but you also have to provide ground attachment to keep the whole thing from becoming airborn. Ask my horse.... One morning after a wind storm I went out and she was standing in the middle of a SEA of legs and tarps wiggling one leg with her lip... When she saw me it was like.... "What... !"
She now has an engineered shelter rated for 100 mile winds and snow loading twice what is required for our area...
But with all that my next coop will have tin...
I LOVE the straw bale idea. Utility plus something for them to scratch around on. Then come springtime when the snow melts and it gets wet from rain, excellent garden mulch. Straw is really high around here now though - small wheat straw bales are bringing $4.25+ each! Last year I got them for $3.
Put them on the outside of the run and cover with tarps.... for twelve plus bucks you can put up four bales get the winter benefit then come spring time un cover and use... anything moldy goes in the garden straight away... win win. I used to make an igloo for my goats for winter time.... OH MY GAWD what fun they had with it.
Past poultry: Buff Brhama, EE, Barred rock, Wellsummer,
Bantam mixes, Araucana, Turkeys, & Guinea Fowl.
Future poultry: Guinea Fowl, Sumatra, Wellsummer, Muscovy
"A dream without a plan is just a wish" Katherine Paterson