It’s beautiful!PS Honestly, we would highly recommend you go full walk in height in the coop. Our chicken coop is up off the ground but not tall and it's difficult to clean. MUCH easier to clean a coop you can walk into. We painted both coops inside with a very good satin paint---multiple coats. This made it much easier to clean. If you leave the inside bare ply you will discover that poop, etc. is almost impossible to get off. Here is inside chicken coop:
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We call a single sloped roof a pent roof. And one with two slopes that meet in the middle an apexHi Hannah, Here a pitched roof comes in many forms. It just means angled somehow. What we have and what you are showing is sometimes called a shed roof or a lean to roof. Where the roof is pitched to a point in the center forming a triangle is called a gable.
It’s far too windy over here to be able to leave it gaping open all year round. I get that the ventilation needs to be open so that’s nice an high but permenantly open windows - or holes - lower down will make it really drafty here in the UK. Everything is drafty here...I can't think of any reason to have glass in the chicken coop windows.
Hardware cloth secured over the frame allows both light and air and you can use a top-hinged shutter to keep out the rain and to, if necessary, close it.