MrWizard wrote:
It is another piece seamed on, only about 18"
Not a complete top coat over the whole awning fabric
Look at the picture in that link, read what it says
I have, indeed, looked at the picture, and read what it said, many times. I am in the habit of doing that before I post a link to something.
When I read the ad, I pictured an additional "sacrificial" layer, exactly what Mr. Speakeasy accomplished with his project, along the top strip of the awning that is exposed to the sun when the awning is rolled up. That makes perfect logical sense to me. I am certainly smart enough not to expect the entire awning to be two layers, but apparently I am not smart enough to ask this question in the right way. I am also not smart enough to understand why two pieces of anything with a 12' to 20'+ seam down the middle joining two dissimilar materials is better than one solid piece of fabric.
On the other hand, the company that I bought my fabric from could not explain why this two-seamed-pieces idea was better, either, so maybe I am not the only one who doesn't understand.