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Prisma fiberglass/foam shape for spray rails

4K views 28 replies 10 participants last post by  No Bait / Lures Only 
#1 ·
Has anyone used the prisma fiberglass/foam shapes? I am considering using the TR-1530 for spray rails like the yellowfin skiff has on my spear glades x skiff. Thinking of sanding the finish down and epoxy the shapes to the sides vs the under the overhang style spray rails as it would not require any mechanical fasteners to attach to the hull sides...any thoughts or suggestions?
 
#8 ·
I bet Harry could mold you up something that would look nice and not be too bad to install. If I remember the picture of your boat the front bulkhead is open and would allow easy access. I'm envisioning something along the lines of what East Cape does on the Lostmen. Or similar to what folks used to do to lappy Hewes hulls back in the day, not sure why you don't see it anymore, I never thought they looked bad.
 
#9 ·
Not drilling holes thru the hull or deck to attach the spray rails with more places to leak and holes to crack from screws. Would prefer to attach with epoxy n gel coat them. Epoxied spray rails to hull would stiffen the sides as well. Thanks all for your thoughts and ideas. I thought someone on the site might have experiences with the Prisma Shapes. Spoke to Harry some time ago and it seemed he was too busy to build them and I would have to bolt/screw on as well.
 
#19 ·
I'm pretty sure the TR-1530 is meant to be used as a pre-formed stringer with those built in tabs...
Its 2&3/8" wide at the base but tapers to 1" and is 2&7/8" tall.

If you shape it, you will be sanding off the fiberglass and will leave exposed foam which you will just have to re-glass...


http://www.preforms.com/BEAMS.html
 
#25 ·
You can make, repair or build anthing with sarcasm. Is that your skill set? Just about everything I comment on is from firsthand experience. The only thing I have not done on my boat with my own two hands is bend, cut and weld the poling platform but I drew the plans up for it. Everything else was me, not a boat shop or a buddy that was paid to do it. I think I would mechanically fasten spray rails under the lip behind the rubrail before I sanded off gelcoat and epoxied anything to the hull but that’s just me. Sorry for discussing in a general discussion.
 
#28 ·
I have no dog in this fight but personally i would rather they be epoxied on. Ive had to fix leaking bolted on spray rails before and personally i dont like any holes at or near the waterline.
That said, the prisma board is not what your looking for in this situation.
i would run some pvc board strips thru a table saw of your size liking, then run them thru a router table with a large roundover bit. You can then get a couple friends to help you shape the rails with a heatgun to the contour of the hull, and they can give an outside opinion on if it looks good or not! ;)
Then tape the area off nicely, sand inside the taped areas, clean and epoxy it on.
its exactly what i did with my older skiff and im going to do it to my current boat when i get the time.
just take your time and do it right, having a couple people help is a must.
 
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