[ChrisM]

Hi all - just new here so hope that this query is not considered off-topic:

I've built a geodesic dome from plywood and as soon as I have attached it to the dome's base ring, I intend to cut out the aperture, which will be somewhere in the range 750 - 1000 mm wide. I am looking for ideas or tips on making a successful shutter. I plan to have a conventional shutter that slides up over the aperture and down the back of the dome (rather than the twin doors that open sideways). I am looking for a low-profile result, and naturally need it to be weatherproof and slide easily.

I have seen pics of shutters that use grooved wheels either side of a round bar. Has anyone just used teflon runners? Is plywood or masonite okay for the shutter itself? Or any other ideas?

BTW, the diameter is 3.6 metres.

Cheers,
Chris