Good Sam Club Open Roads Forum: Beginning RVing: Attaching luan to fiberglass
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 > Attaching luan to fiberglass

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DrewE

Vermont

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Posted: 06/13/18 09:00pm Link  |  Quote  |  Print  |  Notify Moderator

HadEnough wrote:

If you really want to get a perfect join, neat or slightly thickened epoxy, a vacuum bag and a vacuum pump.

Poor man's vacuum bagging can be done with standard home Depot plastic sheeting, a garden hose with some holes drilled in the last 6 feet of it and your shop vac. Works ok for this type of simple project.


How do you go about applying a vacuum bag to an RV wall?

For smaller items, it's a great method; I just have trouble picturing how it would work in this case. Maybe there's a way I'm not thinking of.





HadEnough

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Posted: 06/14/18 05:17am Link  |  Quote  |  Print  |  Notify Moderator

DrewE wrote:

HadEnough wrote:

If you really want to get a perfect join, neat or slightly thickened epoxy, a vacuum bag and a vacuum pump.

Poor man's vacuum bagging can be done with standard home Depot plastic sheeting, a garden hose with some holes drilled in the last 6 feet of it and your shop vac. Works ok for this type of simple project.


How do you go about applying a vacuum bag to an RV wall?

For smaller items, it's a great method; I just have trouble picturing how it would work in this case. Maybe there's a way I'm not thinking of.


I had envisioned you had the sheet off the wall but given you have it on the wall still, vacuum bagging is actually going to be the most simple option, given holding the sheets together vertically will require screws driven through them, otherwise.

Really depends on the geometry of the thing you are bagging. There is double sided, removable tape to tape the bag/plastic to the wall area, sealing it off around your work area. The work area would have to be fairly airtight. If say, there's an electrical outlet, you'd cut that rectangle out of the bag and tape around the outlet, leaving the outlet exposed. But in any case, you use double sided tape to tape the bag to the vertical wall.

If you were able to share some pictures of the surface I'd be happy to advise on the technique and materials. Life long boat guy here who built a 50ft resin infused performance catamaran. Way too much bagging experience. Ha ha ha. This includes bagging 50 foot hulls (for epoxy resin infusion) and doing them in a single shot... Also vertically like your application.

mobilefleet

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Posted: 06/14/18 05:38am Link  |  Quote  |  Print  |  Notify Moderator

I replaced a fire damaged wall on a 5th wheel, I used Dap contact cement and a roller to apply to both surfaces. Since none of us likely have access to a vacuum bonder or pinch roller, I set the wall down on my garage floor after gluing, walked all over it, and then covered the whole thing with fairly heavy landscape bricks for 2-3 days. Worked great

nickthehunter

Southgate, MI

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Posted: 06/14/18 07:11am Link  |  Quote  |  Print  |  Notify Moderator

I agree with mobilefleet, I think contact cement is the way to go, but also probably the most difficult. If you're not experienced with working with contact cement this is not the project to learn on.

theoldwizard1

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Posted: 06/17/18 10:35pm Link  |  Quote  |  Print  |  Notify Moderator

Check YouTube for videos on vacuum bonding. They use a special tape to seal flat sheets of plastic together to make a bag. It does require an A/C vacuum pump and special adapter. The pump needs to run needs to run until completely cured.

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