When the frame is ready, you then have to put the sidings (plywood and/or chicken wire) and the roofing material of the chicken coop.
When increasing the size or dimensions of your chicken coop, make sure that you double the length of the wood supports and the size.
For example, from a 25mm x 25mm x 2m wood, increase it to 50mm x 50mm x 3m to ensure that the frame is strong and sturdy!
The windows and doors should be the last ones you should work on.
As soon as everything is finished, do a once-over inspection and plug all seams and joints with insulation material to prevent cold air from entering your flock's new house.