New trailer with slide quetion

I've had several units with large slides and by design they've had a slight downward slope while extended. I'm assuming that is what you mean by sag. Mine typically are extended 5-6 months at a time throughout the summer months.

I would never use any form of slide brace or support. My last two units even stated such in their manuals.

The only thing I ever do is exercise the slide mechanisms and work the seals a couple times throughout that time frame by moving the slides back in & out. Having said that, it is likely not necessary because many of our friends leave their slides extended 6 months at a time without ever moving them and they have never had issues.

Do you have any photos of your slide extended?

You 'think' it sags......use a level like RON did and check it.

Slides are 'self supporting'

Slide out jacks sold aftermarket (cause mfgs do NOT supply them) are just a unnecessary product to get your RV monies like RV Toilet Paper, Anode Rods for Atwood Water Heaters etc.

YES they will support the slide BUT every time you walk inside, move around inside, go in/out of trailer it moves up/down due to suspension/tires.
When moving down those slide supports prevent slide from moving along with rest of trailer.
That lack of movement will damage the slide

Use them if you wish.
But if slide really is sagging get it properly fixed vs band-aiding the symptom
and causing further damage

Wonder why mfg. didn't supply slide supports :H

Do not support it.
If the rv settles, you will damage the slide . Any movement in the rv will stress the slide if you support it .

Hello NanciL. Just saw your post or I would have responded sooner.

My last fiver had a super slide and it too looked liked it sagged when out. What I did was to use a three foot level on the dining table to see if it was indeed sagging and the table was level. I than used the level on the outside of the slide and it showed it was plumb but it sure looked off somehow but I let it go.

After spending a winter in Arizona and checking it a few times the level showed all was good. No actual sag.

What I did notice though was when I pulled the slide in was that it contacted the side of the trailer at the top first then the bottom pulled in. I'm thinking that the slide is not really square to affect the closing at the top first thereby giving the illusion of sagging.

I would use a level to see the status of your slide and if it's really sagging then back to the dealer to have them check it.

At the CG we were at though I did see some RV'ers had slide supports under them. When I asked them about it they had no real reason they had them other than they were concerned about the possibility of the slide mechanisms bending. I never had a problem though...