Should I insulate coop

[Sherry13]

I am building my first coop and not sure if should insulate. I bought a coop that you assemble and its thin walls not what I thought would be good in winter but they have done fine in it but its only been low 30s a couple nights and a small coop. I live in Indiana. I will be making a big 4 x 12 coop. I will have plymouth rock, white leghorn, golden laced wyandotte, and buckeyes. Any help would be great.

 

[sarahandjay]

This thread maybe helpful to you....OP is from your area as well. Good luck
https://www.backyardchickens.com/t/292850/do-you-insulate