We used 10 oz Harbor Freight painters drop cloths. They were sewed with a seam, but I cut the (fat) seam out so I had flat sheets of canvas.
I glued down the first part, let it dry, them overlapped about 1 to 2 inches when I glued down the second part.

Same thing for the edges. I put the sides on flat, and let it dry. then I trimmed to about a 1-1/2" excess. painted glue on the wood, and wrapped it around the edge. Smoothing with my palms made the wrap easy to do, and I didn't need to slit the canvas. Following the same procedure for the top canvas left a double layer all along the edge.


After gluing it in place I stepped away from the glue bottle. I applied the exterior latex house paint to the BARE canvas. Some people soak the outside of the canvas with glue, but I believe that glue is made to stick things together (canvas to wood), and paint is made to protect a surface (bare canvas)
We've been real happy with the canvas cover on ours.

Sam