Shading

Hmmm... that's a pretty open ended question. Why are you trying to shade high light orchids?

 

I use 60% and that seems to work good

 

Your fiberglass covering by itself will probably filter the light enough to keep your plants from sunburn. By high light, I can only assume you are thinking of the Vandacious, Dendrobiums, or possibly Cattlayas. I use a 50% shade cloth during the Summer months and remove it in the Fall. From what I was able to see in your pictures that you posted here a while back, I notice that there are trees in the vacinity of the greenhouse. Unless you are sitting in direct sunlight for most of the day, I seriuosly doubt you need any shade cloth. If you still think it is too bright, try some 10% shadecloth in areas of the house that you feel are too bright. Since your house has such high clearences, you might want to hang it from inside the greenhouse. At least that way it will last longer for you.

just tom