Heat problems with a South facing aspect.

I was well aware that my South facing wall wasn't ideal.

This is why I adapted a common nest box design by adding the false roof, front & side to each box.

However, tucking them under the eaves also helps to keep the harmful rays of the sun from heating up the interior of each box, too much.

As you can see in the next two photos, even although this is 1pm on a sunny day, the boxes themselves are being protected & are mostly in shade.

 

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By the middle of the afternoon, only a thin strip of direct sunshine is reaching the lower right corner of each actual nest box.

 

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By 5pm, the boxes are all in full shade. 

 

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