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Fiberglass Woven Roving cloth is a collection of specific numbers of untwisted continuous filaments. Due to higher fiber content, woven roving's lamination has excellent tensile strength and impact-resistant property.
It can also be used with chopped strand mat to fabricate large size objects, such as boat, vehicle components, pressure tank, house, etc. Woven roving is the primary strength material used in fiberglass boatbuilding. 24 oz. per square yard material wets out easily and is usually used between layers of mat for strong laminates.
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Is it possible to lay up multiple wet layers with epoxy without using fillers or will the course texture result in voids? How thick will one layer of this + one layer of mat get and how thick will two layers of this + a layer of mat be? I'm adding a core to the roof of a large clamshell travel trailer to stop it from sagging. No need to handle impact of foot traffic like the deck of a boat, but it shouldn't compress either.
Fiberglass lamination is typically done using unthickened epoxy. You can layer up multiple sheets in one sitting. The amount of resin required will vary depending on the weight of the fiberglass.
I am repairing an old Mastercraft. The balsa between the outer glass and inner glass has rotted. I have removed the rotten balsa. The stringers are solid. I plan multiple layers of this 24oz woven roving and 24oz Biaxle cloth. How many layers would you recomment to replace the balsa and inner glass layer? Will wet out with West System Epoxy.
Hard to tell Chuck, I used the Roven Woving for building a car body, four layers built up about 1/8" all I can tell you is that stuff is very strong even with a few voids in it.I am not familiar with boats.
Chuck, I had the same issue with a sailboat floor, I recommend reconstructing with balsa core which is available from Jamestown dist, if you replace with fiberglass @ least two layers you are going to add considerable weight and cost vs the balsa wood, additionally I believe the balsa provides a dampening effect while the boat is in operation. My two cents.Best Regards,
Assuning the outer and inner layer of your fiberglass hull will be properly repaired/replaced, 1 layer of woven will have the strength of the balsa. But you may want to fill in the void left from the removed balsa with enough layers to flush the void out to original hull thickness.
I'm repairing the gunwhales on my 38' powerboat. It had fiberglass encapsulated wood which I've removed as much as possible. I need to fill in the 3/4" void where the rotted wood was removed from. I am considering either Bondo hair filler or fiberglass roving. If I use the roving, I will need to force it in to the void (3-4" deep). I thought about saturating it, then rolling it and inserting it into the horizontal opening. What option do you believe is the better solution? If using the roving, will my method work? Thank you.Capt Ken
I found the fiberglass roving is plenty pliable once saturated for the use you described - I am a wooden boat guy so the sound of using Bondo instead is sure to dissapoint over time - the use of a full epoxy instead of a polyester would be my recommendation,Capt Chris
Appreciate your advice Christian...
Thanks for the advice Chris...
Sounds like it will work, but look into slower setting resins. You'll need time to work. The other thing is try to work vertical (if you can) so you can pour resin into the void to avoid air pockets. I had to turn an entire car body on it's side so that I could get the resin to "puddle". It is very hard to saturate that stuff unless you can pour the resin.
How much resin does it take to saturate one square foot of 24 oz woven roving?