Currently building a wood strip foam core kitesurf board and would like some tips on glassing and how much weight it is going to add.

Board is 5'9" x 17" bottom was put on at 4mm and top at 5mm thick, current weight is around 6kg but still got a lot of material to come off as i shape the rails down ,what weight glass and how many coats recomended for that construction and roughly how much weight will it add.

Just been doing some googling.
Polyurethane coat pre glassing, pros and cons ?
I had been thinking of doing a filler coat, epoxy wood flour mix to fill any tiny holes and as a base sealer pre glassing, thoughts please.

with timber and balsa boards i usually sand a heap of the same colour timber and mix it with the epoxy resin for filling minor cracks and holes.

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pirrad said...

Just been doing some googling.
Polyurethane coat pre glassing, pros and cons ?
I had been thinking of doing a filler coat, epoxy wood flour mix to fill any tiny holes and as a base sealer pre glassing, thoughts please.

give it a few coats mate....nothing worse than getting that resin reaction that some times occurs over wood...I ve done a few balsa boards and given them a couple of coats of polyurathane with no problems you can give em a coat of resin but I thought the poly was easier...light sand between coats...if its western red cedar you might want to give it three coats...its a kiteboard give it some glass around the foot pads

is that a pu or eps foam core id give it one 4oz on each side and another 4oz around the feet area use epoxy resin with theses layers .should add about 600/800gms if done right

pu. Was hoping 4oz would do, dont know about the extra around foot area, i did recess 3mm inlays into foam before laminating skin on.