Need a Stud Finder

Can you go out in the morning when the dew is still on it? That will show where all the framing is from the outside.
Otherwise stud finders are cheap, give one a try.

I'd think most any stud finder would do that. It's not much different than finding wooden studs under gypsum board. (One exception: a few really cheap so-called stud finders are just very thinly disguised magnets that are finding sheetrock nails or screws. They won't work very well to find wood studs glued to fiberglass for obvious reasons.)

I bought one at Costco to replace my beat up cheapo I have used for 20 years.
Would offer the old one but it is not worth the shipping.

I have a Zircon I bought on Amazon. It had good reviews.
It doesn't always find studs through 1/2 inch drywall.

See if you can borrow one before you buy, especially if you're only going to use it to find the studs on your RV.

If you buy, get a good one and try it as soon as you can. You may have to return it.

And, if you get one that does the job, let us know the make and model.

Old carpenter trick... with your middle finger (biggest and heaviest), tap on the surface continuously as you move across. Hollow sound is obviously not a stud but, as the pitch goes higher, you're approaching a stud. Tap back and forth over the high pitch area and you have found the center of the stud. Easy to map out your supports with this method.

I cant use stud finders as they are always going off when I am holding them :-). Seriously though, get a good one if you are looking to buy one. Life is too short to use cheap tools. The cheap ones often wont find the studs.

Many trailers with a fiberglass exterior have very few studs and they are often aluminum. Be sure that you know how your trailer was built.

My wife is the best stud finder I know of! LOL

I do the wall tapping and usually have good luck finding them that way.

Holding up anything of any weight however I will add a back board first and then mount the unit to the board... Never any pull through problems doing it this way...

Something like these google images...




Roy Ken

I use a stud finder that can also find electrical wires. Not 100% accurate, 90+ maybe. Buy a good one. I also like the "dew in the morning" and "frost" methods- those are darn near foolproof.