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Old 08-16-2014, 10:18 PM   #11
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I just mounted a rack on the back wall in the bath. I didn't hear any giant sucking sound when I screwed into it.

I just used regular screws and it looks like it's holding ok for now. Since the wall is paper thin and then Styrofoam, I may have to replace the screws with Molly screws however if the wife gets carried away with loading the little rack.

I want to add some shelves to the sides but not sure how to find the studs without buying one of those expensive stud finder that finds aluminum. I wonder if they work.
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Old 08-19-2014, 08:06 PM   #12
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Old 08-25-2014, 03:00 PM   #13
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Although I'm late to this thread, from my sailboat experience -

Foam core with fiberglass skins is a proven method of building a fairly strong structure (much stronger than the fiberglass or foam by itself) at a light weight. The glue bond between foam and fiberglass is critical to the composite structure's strength, which is why a vacuum is pulled during the gluing operation (as others have said).

The strongest attachment methods are

a) through-bolting with good-sized backing plates on both sides to spread the compression load over the thin fiberglass skin. Bolt holes should be caulked/sealed to prevent water intrusion into the foam and/or glue joint.

b) removing gel-coat, and expoxy glueing on a wood (or metal) mount plate to which the accessory is screwed.

Neither method lends itself to being reversed very well - although it is easier to fill empty bolt holes than remove a mounting plate.

just my experiences
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Old 08-26-2014, 11:34 AM   #14
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Originally Posted by pgandw View Post
Although I'm late to this thread, from my sailboat experience -

Foam core with fiberglass skins is a proven method of building a fairly strong structure (much stronger than the fiberglass or foam by itself) at a light weight. The glue bond between foam and fiberglass is critical to the composite structure's strength, which is why a vacuum is pulled during the gluing operation (as others have said).

The strongest attachment methods are

a) through-bolting with good-sized backing plates on both sides to spread the compression load over the thin fiberglass skin. Bolt holes should be caulked/sealed to prevent water intrusion into the foam and/or glue joint.

b) removing gel-coat, and expoxy glueing on a wood (or metal) mount plate to which the accessory is screwed.

Neither method lends itself to being reversed very well - although it is easier to fill empty bolt holes than remove a mounting plate.

just my experiences
Fred W
Thanks for the info. Do you see any issues screwing things (molly screws, etccc) into the thin inside wall of the RV to install a shelf. I can't see how this could possibly do damage to the structual intergrety of the wall? (assuming you don't drill all the way thru to the outside, ha)
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Old 08-26-2014, 07:42 PM   #15
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We have used Command Strips for most of light weight items and has worked well. Planning to use a couple of screws and Command Strips for a shelf over the bed.
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Old 08-26-2014, 08:05 PM   #16
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We have used Command Strips for most of light weight items and has worked well. Planning to use a couple of screws and Command Strips for a shelf over the bed.
Command strips, thanks. I must admit, I had to look that up as I didn't know what that was but it's a great idea. We have one in the shower holding up a pretty heavy rack of shampoo etc... and has been there for years. Thanks for the tip!
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Old 08-31-2014, 10:37 AM   #17
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Here's how I added some shelves to a hanging clothes cabinet. It's ok to be critical, I want honest opinions and recommendations as I want to learn from everyone's input.

RV Shelve Project - YouTube
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Old 09-08-2014, 06:18 PM   #18
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... not sure how to find the studs without buying one of those expensive stud finder that finds aluminum. I wonder if they work.
Push on the wall with your thumb. It will not give where there are studs. Just take a look around it when you find one to make sure it isn't a pipe or electrical behind it.
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Old 09-09-2014, 04:12 PM   #19
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Push on the wall with your thumb. It will not give where there are studs. Just take a look around it when you find one to make sure it isn't a pipe or electrical behind it.
unfortunately, that doesn't work on my type of wall which has foam behind the wall so it's all hard. plywood, foam core and fiberglass outside.
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Old 01-19-2015, 11:23 AM   #20
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Hi you may want to have at a look this thread "Salem Cruise Lite 195BH TV mount"

there are a few ideas on how to solve your concerns.
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