We have brought home three trellises removed from the roof at Old Farm in order to replace it. Two were trimmed to 5' x 7.5' closed rectangles to mount on the side of Leif's house - now most obvious with 40 large trees taken down. The large trellis has been cut to 3 pieces to blanket the garden shed.
Originally, I called a Nantucket builder for info to build high quality trellis parts; 1 1/4" ripped #1 grade cedar boards we squared and secured with 1 3/4" stainless nails at every overlap from behind. After power washing, we will paint them a French cream like color in Benjamin Moore Woodluxe solid stain. Nantucket Sconset house & trellises below: