My climate is very similar to yours, perhaps colder.
I use deep pine bedding in my coop, have only used sand with PDZ on the drop boards. That worked, I think because the PDZ does it's absorbing thing while the combo mostly prevents waste from freezing to the boards.
I have read sand works...
1/4" x 1/4" is 23 gauge wire; 1/2" x 1/2" is 19 gauge. 23 gauge wire is .0226" thick, 19 gauge is .0359" a difference of more than half.
I suggest that the choice of 1/4x1/4 is the source of failure in your situation. A number of folks above commented on the "straight line". Look closely, not...
There are situations when one does not plan to have direct water contact but it happens. Early in my chicken career I kept water inside the run; it inevitably spills, in winter frozen lumps results.
I used BJ57 when I built my coop. Almost six years it is still intact and essentially...
The link actually downloads a 120+ page document that you can save; print out Chapter III and he will have the details needed to construct. The coop can be scaled from a 6' x 10', to an 8' by 12' to a 10'x 16'.
He can also reference my article and my build thread for more detail. Other build...
I suggest a Woods style coop of 8' x 12', will accommodate up to 24 birds. It is a walk in style, easy to construct, "fresh air" (front is open year round).
This provides details of the build for the "KD" coop plus tips and guidance for new chicken owners...
I used hydrated lime to make white wash and used it to paint the inside of my coop. Some scientific studies confirm that this deters some bugs due to it's caustic nature.
The mixture is extremely easy to apply and renew as well as being very inexpensive.
Wood and water do not mix, you will get years but not many.
I have read of folks using stall mats plus organics on top. They are not cheap but are close to indestructible AND waterproof.
I carefully untie the wire used to bind & ship itself, have never run out so continue to use that for repairs.
Climate matters in this context, as you noted. I am most disappointed in the hog rings; they separate too easily IMHO, seeking alternatives to wire weaving...
I built my run in 2020ish. I used 12-16" aprons all round joined to the HC wire walls only with hog rings; worked very well for 5 years.
These joins are now failing. The rings themselves can detach from the HC and/or the welds on the HC are failing. Does not really matter. Just an alert to...
The temperatures inside the coop is much the same as outside unless one adds heat.
I am in Canada I much prefer collecting eggs from inside the coop than outside.
I have never seen vertical stacking of roosts.
Roosts should all be at the same level (avoids fights over who gets the highest one) OR on a slope with multiple roosts separated by at least 12" horizontally. Either configuration should have the roost closest to the wall at least 12" away.
80%...
I do see hens on the drop board pecking away, I assume that some PDZ makes it's way past their beaks. However, not frequent.
Chickens are very good at taking care of themselves and will not eat anything that is not good for them,