Hi Margriet , here are photos of this years Hutch/Field Shelter at home. Thought that you may be interested in the design. Will sent pictures of another unit I have in White Rock when I get a chance to get out there. Note that I am using a blue tarp , it absorbs more heat than other colors. Bees do not care. John
Outside view of John’s Field Shelter
Inside view of John’s Field Shelter
Tarp is kept tight by nailing a piece of lath over the tarp.