Our 18' pontoon is an '03 and the bimini top was getting ratty. We bought a 10'x20' garden net. (theyr'e sold by shade; ours was 70 percent) Sewing to net is futile, so no sleeves or zippers. Got 1/2" x 8' aluminum strips from lowes. (find them where they sell square tubing and "c" channel) We sanded the edges and corners smooth and drilled holes about every 8", The net was sandwiched between the top of the bows and the 1/2" strips, using self tapping screws. about a foot of screen was hanging over the sides and was screwed to the sides of the bows. We left enough screen hanging off the aft bow to hang down to just in front of the sun deck. There was plenty of screen to reach the front of the playpen; so we fastened some rings to the forward corners of the fence and some cups on the deck to hold 2 aluminum poles. Small rings on the top of the poles hold the forward edge of the net with small bungie cords; and the poles are removable. We fixed 3 1/2" nylon straps to the forward and aft bows to roll up and tie the extra netting. It's actually cooler because the heat doesn't build up under the top. Since the wind blows right through it; at anchor, we don't get the sail affect, and when underway it doesn't act like a drag chute to slow down our old "school zone boat".
