OT: Fiberglassing help, RV Repair |
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OT: Fiberglassing help, RV Repair |
rtalich |
Mar 10 2016, 04:28 PM
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#1
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Member Group: Members Posts: 279 Joined: 25-September 06 From: Bellevue, WA Member No.: 6,913 Region Association: None |
Thought I'd see if there are any glassing gurus out there in the World... and hopefully get some opinions. I have not had ANY chance to work on the car due to 'other' important issues. Suck when the car gets put on the back burner!! Anyway... I am in the process of rebuilding our RV due to water damage. I’ve gotten all the rotten wood out and am currently in the process of thinking about how I am going to build the front cap. The siding was constructed using FRP (Filon) laminated to plywood. My plan is to take the Filon material and basically glass it onto a wooden frame (see pic). I will be making some curved pieces of wood blocking that will go along the top so that when the Filon material is laid onto the wooden frame it will create the sweeping curve you normally see on the tops of RV’s. I was originally thinking of attach it using epoxy resin and fiberglass from the inside and plan to totally conceal all the wood in epoxy/fiberglass to protect it and will serve as a good water barrier. My main question is… which resin would be a better choice to use? Epoxy, polyester or vinylester? My initial thought was to use epoxy because I was not sure if the other resins will shrink at all causing the Filon to distort and not sit flat on the wood frame during the curing process. I want the Filon to sit perfectly flat on the wood frame and cave in or be sucked in which would result in being able to ‘see’ the framing from the outside (does that make sense?). On the other hand, if I could use either poly or vinyl resin, I’m thinking fiberglass mat would make for an easier application and can build up quicker. I also read that poly doesn’t really bond with wood like epoxy. Any help or suggestions would be greatly appreciated.
Thanks, Rob Attached thumbnail(s) |
fiberglass1inc |
Mar 11 2016, 11:49 AM
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#2
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Newbie Group: Members Posts: 15 Joined: 13-April 14 From: WPB Florida Member No.: 17,248 Region Association: None |
To answer you questions on comparative shrinkage - most polyesters will shrink between two and a half and three percent on cure, vinylesters about one to one and a half percent, and most epoxies will shrink less than 1/2%. When working with wood, epoxy is the best way to go because of bond strength, especially if the finished product is going to be a dark color.
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