How to repair this Fiberglass area

[Dav L]

Clean up all parts. Paint the metal, an put one or two layers of fiberglass on the existing fiberglass.

[RKins]

I agree with DavL's recommendation for the metal.

To add to the FG repair, lightly scruff the inside FG up with at least 80 grit, being sure not to cut through. Then I would use a polyester resin and 3/4oz chopped strand mat (CSM) to add a layer or 2 of the CSM wet on wet. Grind the hardened (I like using flap sanding wheels) CSM semi smooth and then cover with insulation, etc. Find a marine place to buy the materials.

[Dav L]

https://www.msn.com/en-us/autos/enth...ail/ar-AAJqpLT
Look at 9:00 on preparing the metal. I would first wire wheel to remove the big rust scaling, vacuum and then treat and prime as per that video.

You can buy all the fiberglass material at Home depot and walmart. Cheaper at WM.

[THenne1713]

Suspicion is still heavily coated in remnants of the lauan plywood? So remove this and clean, cut new and glue back to the fiberlgass using acrylic adhesive, such as Titebond Fast Grab FRP adhesive. Do NOT use solvent contact cement, as fumes can melt any foam insulation.

[EyezOpen]

Boy i am quite new to this forum and RVs but not new to fiberglassing...I would like to here anyone's rational for trying to use fiber glass to bond to aluminum or metal...In 30 yrs ive never seen that done successfully...perhaps FPR board which and a glue that will bond to aluminum and the FPR ... Its about expansion rates in the end...If you must follow this path a Epoxy resign would be the best bet...Epoxy is stronger and actually has a much better glue like quality...good luck.

FPR board laid flat on the outer skin wall..... then framed... then build your new inner wall. Very simple.. very strong... little or know guess work.

[C5c5]

Originally Posted by THenne1713

Suspicion is still heavily coated in remnants of the lauan plywood? So remove this and clean, cut new and glue back to the fiberlgass using acrylic adhesive, such as Titebond Fast Grab FRP adhesive. Do NOT use solvent contact cement, as fumes can melt any foam insulation.

Wouldn't the Lauan plywood still be attached to the interior paneling right before the insulation layer? Or is it after the insulation covering the exterior fiberglass? Im still learning this so I may be mistaken!

[Dav L]

Originally Posted by EyezOpen

Boy i am quite new to this forum and RVs but not new to fiberglassing...I would like to here anyone's rational for trying to use fiber glass to bond to aluminum or metal...In 30 yrs ive never seen that done successfully...perhaps FPR board which and a glue that will bond to aluminum and the FPR ... Its about expansion rates in the end...If you must follow this path a Epoxy resign would be the best bet...Epoxy is stronger and actually has a much better glue like quality...good luck.

FPR board laid flat on the outer skin wall..... then framed... then build your new inner wall. Very simple.. very strong... little or know guess work.

I don't think anyone is suggesting to fiberglass the metal. My recommendation was clean, treat metal, prime and paint. Metal is then done.

For the exterior fiberglass, clean, put resin and new glass ontop on the interior side to strengthen the outer skin. Then, reinsulate (foam board is fine), Luan, finish interior panel.

[EyezOpen]

Originally Posted by Dav L

I don't think anyone is suggesting to fiberglass the metal. My recommendation was clean, treat metal, prime and paint. Metal is then done.

For the exterior fiberglass, clean, put resin and new glass ontop on the interior side to strengthen the outer skin. Then, reinsulate (foam board is fine), Luan, finish interior panel.

Eyes open yes but s smidge blind without reading glasses.....my bad and you are quite correct.

[C5c5]

Today I trimmed down the peeling outer layer of the fiberglass.

I ran out of daylight so I didnt get too far.

[153stars]

I agree with earlier post to use epoxy. Not 5min epoxy you can tack down glass mat with super glue . Brush in epoxy you can warm it with hair dryer it will be thinner to soak through easier. Follow temperature guide lines for curing.Go ahead and let woven mat over hang and trim later. Don't over wet the over hang it will keep it from dripping off. You can over wet glass and float it off the surface too much.

[C5c5]

Originally Posted by 153stars

I agree with earlier post to use epoxy. Not 5min epoxy you can tack down glass mat with super glue . Brush in epoxy you can warm it with hair dryer it will be thinner to soak through easier. Follow temperature guide lines for curing.Go ahead and let woven mat over hang and trim later. Don't over wet the over hang it will keep it from dripping off. You can over wet glass and float it off the surface too much.

TY 153!

Is wetglass the same as fiberglass mat?

[EyezOpen]

I can see maybe a tutorial or a indepth method might help...below is a fairly inexpensive simple thread of glassing...Pay attention to Ondarvr he is one of best in the boating industry. The DR is quite well informed as well

https://forums.iboats.com/forum/boat...ivingston-hull

[153stars]

Originally Posted by C5c5

TY 153!

Is wetglass the same as fiberglass mat?

Sorry not sure what is wet glass is Google didn't come up with mat. Yeah good idea to watch some boat repair vids. I like to watch some pro type and some good ol boy ones for good cheaper tricks for stuff I'm gonna tackle.

[okcnewbie]

If my eyes aren't playing tricks on me I don't think the fiberglass that I see is really even doing anything. It's going to be covered with some type of new board/paneling, etc.
Make the new repair and window install better than the original. This shouldn't be too hard based on what I've seen (even with Newmar, etc.) They don't take the same type of time that a home window installer would. Once you make the new window leak proof will it really matter how that fiberglass looks?