Sounds like it will be anchored when you attach it to the straight wall.
Mine are stand alone coops (1 on a 2x6 base & 2 on 2x4 bases) and have withstood sustained winds of 37 mph during Hurricane Matthew (1 tarp came loose on the BARN side, shredded and had to be replaced) and gusts up to 50/60 mph. The tin roof of the barn right next to the coop and the tin roof on a shed behind the house sustained more damage, but I don't know how long either roof has been in existence. Neighbors couldn't say when either was roofed.
The two that are out more in the open didn't move nor did the tarps sustain any damage. They both stayed dry inside during 2 different rain events where we had more than 9" at one time and more than 11" during hurricane Matthew.
I no longer recall what winds they went thru the first several months at our first property or while they were at another property temporarily for 3 months while we were in the process of closing on this new home and moving in.
Our "temporary" hooped feed sheds have had more damage but I suspect it's because of the farm cats that climb up and lay on the tarps. They are fed in the sheds, too. The 1st one has had the tarp replaced 2x and currently with no hay/bagged feed stored in it is not tarped... The 2nd one very obviously needs a new tarp - while it's not loose, shredded or blowing around, during our last rain event last week (2" of rain in 1 hour + more, not sure how much total) the whole sand floor, and everything in it were wet (including a bag of chicken feed not stored in a trash can) and looking up at it from inside, lots of "starry" sunlight,
. But I certainly can't complain - that tarp was used before becoming the roof for that shed and it's lasted 2-1/4 seasons here (tarped in March 2015 - thru June 2017)!
Mine are stand alone coops (1 on a 2x6 base & 2 on 2x4 bases) and have withstood sustained winds of 37 mph during Hurricane Matthew (1 tarp came loose on the BARN side, shredded and had to be replaced) and gusts up to 50/60 mph. The tin roof of the barn right next to the coop and the tin roof on a shed behind the house sustained more damage, but I don't know how long either roof has been in existence. Neighbors couldn't say when either was roofed.

The two that are out more in the open didn't move nor did the tarps sustain any damage. They both stayed dry inside during 2 different rain events where we had more than 9" at one time and more than 11" during hurricane Matthew.

I no longer recall what winds they went thru the first several months at our first property or while they were at another property temporarily for 3 months while we were in the process of closing on this new home and moving in.
Our "temporary" hooped feed sheds have had more damage but I suspect it's because of the farm cats that climb up and lay on the tarps. They are fed in the sheds, too. The 1st one has had the tarp replaced 2x and currently with no hay/bagged feed stored in it is not tarped... The 2nd one very obviously needs a new tarp - while it's not loose, shredded or blowing around, during our last rain event last week (2" of rain in 1 hour + more, not sure how much total) the whole sand floor, and everything in it were wet (including a bag of chicken feed not stored in a trash can) and looking up at it from inside, lots of "starry" sunlight,


