How to Use RV Leveling Blocks and Jacks Effectively
Salem Hassan founded Travelcamp RV and brings 30+ years of hands-on RV, marine, and powersports retail experience to every review.
✎ Reviewed by Salem Hassan — Founder, Travelcamp RV · 30+ years in RV, marine, and powersports retail
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How to Use RV Leveling Blocks and Jacks Effectively
If you have ever arrived at a campsite only to find your RV leaning to one side, you already know why it matters to learn how to use RV leveling blocks effectively. Proper leveling helps your refrigerator operate correctly, improves comfort inside the rig, reduces stress on the frame, and makes doors, slides, and plumbing work more smoothly. We researched best practices used by experienced RV owners and service professionals to put together this practical guide.
Why Proper RV Leveling Matters
Leveling is not just about comfort. It affects several key systems in your RV:
- Appliance performance: Absorption refrigerators often require a level position to work properly.
- Water drainage: Sinks and showers drain better in a level coach.
- Structural stress: An uneven setup can put extra strain on the frame and suspension.
- Slide-out operation: Many manufacturers recommend leveling before extending slides.
- Sleep and stability: A level RV feels more secure and comfortable.
Understanding RV Leveling Blocks and Jacks
Before we get into the process, it helps to know what each component does.
RV Leveling Blocks
Leveling blocks are placed under tires or under jack footpads, depending on the setup. Their job is to add height where the ground is uneven and to create a more stable contact point.
RV Leveling Jacks
Leveling jacks are used to stabilize and, in many systems, level the RV. These may be:
- Manual scissor jacks
- Stabilizer jacks
- Hydraulic leveling jacks
- Electric leveling systems
Important Difference: Leveling vs. Stabilizing
This is one of the most common points of confusion.
- Leveling brings the RV into an even position side-to-side and front-to-back.
- Stabilizing reduces movement after the RV is already level.
We recommend never relying on light-duty stabilizer jacks to lift or level an RV unless the manufacturer specifically says they are designed for that purpose.
Tools and Supplies to Have Ready
Before setting up camp, gather the basics:
- Leveling blocks
- Wheel chocks
- Built-in bubble level or small carpenter’s level
- Gloves
- Jack pads if needed for soft ground
- Your RV owner’s manual
Step-by-Step: How to Level an RV Effectively
1. Choose the Best Spot Available
Start by selecting the flattest site possible. Even the best leveling system works better when you begin with a reasonably even surface.
Safety Tip
Avoid setting up on loose sand, deep mud, or sharply sloped ground whenever possible. Soft or unstable ground can cause blocks or jacks to shift.
2. Check Your Initial Side-to-Side Level
Before placing blocks, check whether the RV is leaning left or right. Many RVs have a built-in level, but a small bubble level on the floor or frame can also help.
If one side is low, that is the side that will need blocks under the tires.
3. Build the Right Height With Leveling Blocks
Place leveling blocks in front of or behind the tires on the low side, depending on whether you need to pull forward or back onto them.
A gradual stack or ramp-style arrangement is usually easiest and safest. Add only as much height as needed.
Safety Tip
Do not create a tall, unstable stack. If the site requires an extreme amount of lift, it may be safer to reposition the RV or choose another site.
4. Pull Onto the Blocks Slowly
Drive or back onto the blocks carefully. Have a spotter outside if possible. Move slowly and stop once the tires are centered on the blocks.
For towable RVs, this step usually levels the trailer side-to-side before unhitching.
5. Chock the Wheels Immediately
Once the RV is in position, place wheel chocks firmly against the tires.
Safety Tip
This is not optional. Chocks help prevent rolling while you continue setup, especially on uneven terrain.
6. Check Level Again
Recheck side-to-side level first. If needed, repeat the process and adjust the number of blocks.
Once side-to-side is correct, move on to front-to-back leveling.
7. Level Front-to-Back
For a travel trailer or fifth wheel, use the tongue jack or landing gear to raise or lower the front until the RV is level front-to-back.
For a motorhome, use the leveling jack system according to the manufacturer’s instructions.
Safety Tip
Lift only as much as necessary. Avoid overextending jacks, and make sure the jack feet are on stable surfaces or pads.
8. Deploy Leveling or Stabilizing Jacks Correctly
If your RV has hydraulic or electric leveling jacks, follow the prescribed sequence in the owner’s manual. If it has stabilizer jacks, lower them only after the RV is level.
They should make firm contact with the ground or jack pad without lifting the RV beyond their intended purpose.
9. Recheck Doors, Slides, and Interior Feel
Walk inside and confirm that:
- Doors swing normally
- The refrigerator is operating in a level position
- Counters and floors feel even
- Slide-outs can be deployed per manufacturer guidance
10. Make Final Stability Adjustments
After leveling is complete, lightly snug stabilizers if equipped. The goal is to reduce bounce, not to force the frame into a different position.
Best Practices for Different RV Types
Travel Trailers
- Level side-to-side before unhitching
- Chock wheels before adjusting the tongue jack
- Use stabilizers only after full leveling is complete
Fifth Wheels
- Level side-to-side with blocks under the low-side wheels
- Use front landing gear for front-to-back leveling
- Recheck after unhitching, as weight transfer can change the position slightly
Motorhomes
- Use blocks under tires if required by the leveling system manual
- Follow the manufacturer’s jack deployment sequence
- Confirm whether slides should go out before or after leveling; this varies by model
Common Mistakes to Avoid
- Using stabilizer jacks to lift the RV
- Forgetting wheel chocks
- Stacking blocks too high
- Leveling on unstable ground without pads
- Ignoring the owner’s manual
- Extending slides before the RV is properly level when the manufacturer advises against it
Troubleshooting RV Leveling Problems
If your RV still feels off after setup, use this diagnostic process.
1. The RV Still Feels Uneven
Possible cause: Not enough block height or inaccurate level reading.
Solution:
- Recheck level on a known flat interior surface.
- Confirm which side or end is low.
- Add or remove one block layer at a time.
- Reposition and recheck.
2. Jacks Sink Into the Ground
Possible cause: Soft soil, wet grass, or hot asphalt.
Solution:
- Retract the jacks safely.
- Place jack pads or wider support blocks under each foot.
- Reset the jacks slowly.
- Monitor for further sinking over the next few hours.
3. The RV Rocks When Walking Inside
Possible cause: Stabilizers are not snug, or wheel chocks are loose.
Solution:
- Check that wheel chocks are tight against the tires.
- Lower stabilizers until they firmly contact the ground.
- Do not overtighten and twist the frame.
- Recheck movement inside.
4. Automatic Leveling System Stops or Errors Out
Possible cause: Low battery voltage, steep site, or sensor issue.
Solution:
- Check battery condition and voltage.
- Verify the site is within the system’s operating range.
- Inspect for obvious obstructions or uneven jack footing.
- Reset the system according to the manual.
- If the fault continues, use manual mode if allowed and schedule service.
5. Doors or Slides Do Not Operate Smoothly After Leveling
Possible cause: The RV may still be slightly twisted or out of level.
Solution:
- Recheck side-to-side and front-to-back level.
- Confirm jacks are contacting evenly.
- Back off any stabilizer that may be over-tightened.
- Adjust the leveling position and test again.
Maintenance Guide for Leveling Blocks and Jacks
Routine maintenance helps your equipment last longer and work more safely.
How to Maintain RV Leveling Blocks
- Clean after use: Remove mud, gravel, and road grime.
- Inspect for cracks: Replace damaged blocks that show splitting or deformation.
- Store dry: Keep blocks in a ventilated bin or compartment.
- Check fit and stack stability: Make sure interlocking surfaces are not worn down.
How to Maintain RV Jacks
- Inspect the jack feet: Look for bending, rust, or uneven wear.
- Clean exposed components: Wipe dirt from hydraulic rams or screw mechanisms.
- Lubricate where approved: Use only lubricants recommended by the manufacturer.
- Check mounting hardware: Tighten loose bolts to spec if the manual provides torque values.
- Test operation monthly: Extend and retract jacks to confirm smooth movement.
Safety Tip
Never crawl under an RV supported only by jacks. Use proper support stands and follow all manufacturer safety procedures.
Seasonal Leveling Equipment Checklist
Spring Checklist
- Inspect blocks for winter cracking
- Clean and test all jacks
- Check hydraulic fluid if your system requires it
- Verify battery health for electric or hydraulic leveling systems
- Practice a full leveling cycle before your first trip
Summer Checklist
- Watch for jack sinking on hot asphalt
- Clean dust and grit from moving parts
- Inspect pads and blocks after frequent campsite moves
Fall Checklist
- Wash and dry blocks before storage
- Inspect wiring and connections on powered systems
- Touch up rust-prone metal parts if needed
- Confirm all jacks retract fully before colder weather
Winter Checklist
- Store portable blocks out of standing moisture
- Keep jack mechanisms clean and protected
- Cycle powered jacks occasionally if the RV is stored with battery support
- Review the owner’s manual for cold-weather hydraulic recommendations
When to Stop and Reposition the RV
Sometimes the smartest move is not to keep adding blocks or extending jacks. We recommend repositioning or changing sites when:
- The slope is too steep to correct safely
- Blocks must be stacked excessively high
- Jacks are near full extension
- The ground is too soft to support the RV reliably
- The RV still feels twisted after several careful adjustments
Final Thoughts
Learning to level an RV well takes a little practice, but the process becomes routine quickly. The key is to work in the right order: choose the best site, correct side-to-side first, chock the wheels, level front-to-back, and then stabilize. When we researched common setup issues, most problems came down to rushing, skipping chocks, or asking stabilizers to do leveling work.
A careful, methodical approach will protect your RV and make every campsite more comfortable.
Key Takeaways
- Start with the flattest campsite possible.
- Level side-to-side first, then front-to-back.
- Always chock the wheels before continuing setup.
- Use leveling blocks for height correction and jacks according to manufacturer guidance.
- Stabilizer jacks are usually for reducing movement, not lifting.
- Recheck level after each adjustment and before operating slides.
- Maintain blocks and jacks seasonally to improve safety and reliability.
