Help me with walls and roof

Finishes, paints and coatings

Re: Help me with walls and roof

Postby QueticoBill » Tue Mar 07, 2017 10:37 am

Does anyone vacuum bag their wall panels, and maybe hatch lid? Roof/front wall seem hard as they always seem built in place. Is heavy polyethylene, tape or glued or rolled edge seams, and a shop vac silly? Looking for an inexpensive vacuum pump.

There is always tube sand......
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Re: Help me with walls and roof

Postby Andrew Herrick » Tue Mar 07, 2017 11:59 am

My knowledge of vacuum bagging is armchair only, but I've heard some people use a Venturi pump attachment with their air compressors to create an ad-hoc vacuum pump. Seems to work pretty well.
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Re: Help me with walls and roof

Postby KCStudly » Tue Mar 07, 2017 2:24 pm

I did my inner wall skins with a shop vac, sheets of bubble wrap as a distribution media, sheet plastic and tape. Built my own adapter for the shop vac hose. It worked, but I think I could have gotten a better result using a proper vacuum pump with sufficient capacity.
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Re: Help me with walls and roof

Postby Atomic77 » Tue Mar 07, 2017 5:06 pm

I used a shop vac as well. Just remember is not the "draw" that does the work. It's that the vacuum allows atmospheric pressure to become the clamp. My suggestion would be don't worry about the vac, but do use a thicker plastic that doesn't "stretch."
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