I want to fibreglass an aluminium motorhome. Is it possible>>>>

Need to try a RV site.

just sand the aluminum first.

I've tried to repair 32 Ford fiberglass bodies that had aluminum framing without success BUT the factory did it some how.

After getting it mechanically sound you may just want to spray on a bed liner like used on truck beds. It will seal and lends to better protection from things like hail.



Good luck you'll get er!!!!!!

Can you provide a pic? Would really help

This works good

If you get a Pop Rivet gun and a drill bit of the right size,you should be able to rejoin the seams easily, a little silicone in the joint before riveting should ensure a water tight joint.
You can do this for about $20.
Fiberglass will be too expensive and will weather off.

I have never tried to adhere fiberglass to aluminum.

But...

I have painted a lot of aluminum professionally.

The problem with aluminum is that it is an extremely active metal the very top layer combines with oxygen IMMEDIATELY when exposed. This is why sanding doesn't really work.

Oh...

and when I say it combines with oxygen, what happens is it forms a layer of aluminum oxide which just doesn't adhere well to paint or glue.

To get around this you use what is called a conversion coating.

First you sand it with very rough sandpaper to provide some "tooth".

Then you use a cleaning agent to remove any grease, oil or dirt rubbed in by the sanding process.

Then you brush on the conversion coating (the stuff I used would give the aluminum a golden yellow tinge.

Then you liberally rinse off the the residue.

Let it dry.

Then apply your fiberglass as soon as possible.

Go to your local automotive paint store and ask them about it.

However...

This might not be a good idea, ie fiberglass to aluminum.

I have a feeling the coefficients of expansion will be radically different.

I ran into this problem making some signage years ago.

We had sandwiched some .40 aluminum to 3/4" plywood in cutout shapes. This was done in a relatively warm shop at about 60 degrees F. Some of the pieces were about 2 inches by 10 feet long. On the day of installation it was about 10 degrees below zero F. The long pieces that were flat in the shop had about a 5 inch bow in them after they got cold.

So what I'm saying is that if you have temperature swings the materials working against each other could cause it to come apart.

Hope I haven't confused you entirely.

I want a bullet proof pecker...

gawd why would you even want to try


think rather rivets,sheet aluminium and silicon

top it off with some paint on roofing bitumen if you need to

check out boat forums--aluminum pods on fiberglass boats
and fiberglass pods on aluminum boats...

overwhelming majority do not recomend the two because of the expansion diferential.
but I have read some threads on guys that have done it...

i can't remember the excat outcome/conclusion.

its not the greatest.

---i wouldn't try to adhear the biberglass

--let it "float overtop.

or

if your rig is stationary---why don't you use rolled roofing and tar.

or

patch, then cover the patched area plus a little more with rolled aluminum, "liquid metal ", and rivits

good luck

Grace Ice Shield.


Its an adhesive rubber sheet that is made to put on the first 4 feet of a homes roof. Its very strong, non permeable, and flexible. It will seal your hole.

Yep this post above sounds good, you can also get this white liquid rubber called cool roof coating from Home Depot or Lowes this would work the best, don't use fiberglass..

Also check out the web site forum called RV.net, lots of good info for all RV's..

Wow. Thanks for all the responses. Looks like I won't be trying that then.
I have a thing called roof proof to paint on. That was mt next option.
Really thank you all.I knew Glp would make it easier to understand.