Originally Posted by James S
I'm now in the process of designing my Bimini and although the rest of my "canvas" work is dark blue, I was figuring on white.
Seems like a reflective surface on the top would be the cats ass.
I wonder what materials are available for such an application.
I did experiments between our chosen "Forrest Green" Sunbrella and white. Took temperature readings under each... IF there is air flow, like under an awning or a bimini NOT currently connected to the CLOSED dodger
, then the dark = opaque green, is much cooler than the translucent white. This is again, IF there is air flow, and measured at least 10" from the fabric
, not right next to it. White is too translucent!
White provides limited shade to your sails
as well, so with light colors, you need a liner for UV protection.
For our dodger
covers, we made them white on the outside and a layer of green inside. (Opaque to protect the Lexan). This was the best... reflective AND totally opaque. It would not be advisable to double layer the bimini, however, because it would trap water
between layers and be too hard to accomplish.
Good luck with it,
BTW... The same principle applies to paint. If you paint your hull
with opaque GREY primer then white topcoat, it will be a couple of degrees COOLER inside than if you paint it with translucent WHITE primer, then white top coat. I made samples of each and measured the temps...