I made my own awnings.
I used several pieces of 1.5" pvc pipe the width of the beam.
For the main, I had 4 of these. My the foot of my main was not very long, you could increase the pvc poles to 5 or 6 for your boat
To the pvc, I attached an awning made from sunbrella, which I sewed myself using a cheap
'ole Walmart sewing machine
and nylon thread, don't use cotton here. The awning was the lenght of the boom and the width of the beam. At the end each pvc location and the front and back center, I reinforced the fabric
and I punched a brass ring thru' the fabric
. The edges were all rolled over to a 3-ply thickness.
At each ring location I tied a lenght of 1/8" nylon rope.
The sides of the awning was attached to the lifelines
, the front was attached to the mast and the back to the end of the boom.
The pvc will take a bit of a bend and arc
over the boom.
Even in high winds, it never came off. Would flop around a bit, but stay put.
I made a similar awning in a triangular shape, with pvc poles that went over the foredeck. The front being tied to the bow pulpit and the rear to the mast.
When I went sailing, I simply rolled them up and lashed them to the stanchions.
Lasted for years and years.
Made a huge difference when anchored. The beauty being you can leave hatches open in the rain.
Even in the middle of summer, inside of boat
was quite cool, with just a breeze coming thru' the hatches.