Learning how to relevel a mobile home is one of those skills every homeowner eventually needs because houses just don't stay perfectly straight forever. Over time, the ground beneath your home shifts, soil settles, and the changing seasons can cause the foundation to move just enough to be annoying. You'll start to notice it in little ways—a door that used to swing freely now sticks in the frame, or maybe you feel a slight tilt when you're walking down the hallway. It's not just in your head; it's just the nature of manufactured homes.
The good news is that releveling isn't a dark art. It's a bit of a workout and you're definitely going to get dirty, but it's something you can handle with the right tools and a little patience. If you catch it early, you can save yourself a lot of money and prevent structural damage that gets really expensive to fix later on.
Signs your home is out of whack
Before you crawl under there, you want to be sure it's actually a leveling issue. The most obvious sign is the "walking" door. If you open a bedroom door and it starts to slowly drift open or shut on its own, gravity is trying to tell you something.
You might also notice cracks appearing in the drywall, usually near the corners of doors or windows. Sometimes the windows themselves become hard to crank open or slide. If you're really out of level, you might even notice your kitchen cabinets look slightly askew or your drains start running a little slower than they used to.
If any of this sounds familiar, it's time to grab a flashlight and head toward the skirting.
Getting the right gear together
You can't just wing this with a standard car jack. You're going to need some specific equipment to do this safely and accurately.
First off, you need a water level. You can buy one or make one using a long clear plastic tube filled with colored water. Laser levels are cool, but in the tight, dark space under a mobile home, a water level is often more reliable because it doesn't care about line-of-sight or dust.
Next, you'll need at least two 20-ton bottle jacks. Don't go cheap here; you're lifting a lot of weight, and you want something that isn't going to fail while you're under there. You'll also need some heavy-duty wood blocks (usually 2x8s or 4x4s) to use as a base for your jacks so they don't just sink into the dirt when you start pumping.
Finally, grab a box of cedar shims and maybe some extra concrete blocks or steel piers if any of your current ones look like they're crumbling.
The water level trick
If you've never used a water level, it's basically magic based on physics. Since water always finds its own level, you can pin one end of the tube to a "master" point on your home's frame (usually at a corner you know is stable) and then take the other end to different piers around the house.
When the water line in the tube matches the height of the water at your starting point, you know exactly how much that specific pier has sunk. It's way more accurate than trying to use a four-foot carpenter's level on a sixty-foot steel beam.
Mapping out the low spots
Before you start lifting anything, you need a plan. Go under the house and check every pier. Mark down on a piece of paper (or just use a piece of chalk on the frame) how much each pier is off.
Usually, the center of the home stays more stable while the perimeter piers sink. This creates a "hump" in the middle of your floor. Your goal is to bring the low spots up to match the highest point of the home. Never try to lower the high spots—that's a recipe for disaster and can mess up your plumbing in ways you don't want to deal with.
How to relevel a mobile home: The lifting process
Once you know where the low spots are, it's time to get to work. Position your bottle jack on a solid wood base right next to the pier that needs adjusting. Make sure the jack is sitting on the main I-beam of the home, not a floor joist.
Slowly pump the jack. You only want to lift the home a tiny bit at a time—we're talking fractions of an inch. If you go too fast, you'll hear the house groan, and you might actually cause more cracks in your walls.
Once you've lifted the beam enough to take the pressure off the pier, you can slide in your shims. If the gap is huge, you might need an extra piece of wood or a new concrete block. Once the pier is tight against the beam again, slowly lower the jack.
Move in small increments
Don't try to fix one corner perfectly all at once. If a corner is down two inches, lift it half an inch, then move to the next pier. Releveling is a game of rounds. You want to bring the whole house up gradually so the stress is distributed evenly across the frame.
If you just crank one side up to its final height immediately, you're putting a massive amount of torque on the rest of the structure. It's better to do three laps around the house making small adjustments than to try to do it all in one go.
Checking your work inside
Every so often, crawl out from under the house and go inside. Check those sticking doors. You'll find that as you get closer to level, the doors will suddenly start working perfectly again. It's a great feeling of progress.
Have someone stay inside while you're working if possible. They can yell down to you when a door finally closes right or if they hear anything concerning. It makes the process go a lot faster and keeps you from having to crawl in and out of the skirting fifty times.
Don't forget the plumbing and skirting
When you move a house, even just an inch or two, the things attached to it move too. Check your PVC drain lines. They need a specific slope to work right. If you've lifted a section of the house, make sure your pipes didn't get pulled out of their hangers or lose their downward angle.
Also, your skirting might need some adjustment. If you've lifted the home significantly, there might be a gap at the bottom of the skirting panels. You'll want to fix this quickly so you don't end up with a family of raccoons living under your newly leveled floor.
When should you call a pro?
While knowing how to relevel a mobile home is a great DIY skill, there's no shame in calling in the experts if things look sketchy. If you find that your concrete footings are cracked or sinking deep into the mud, a jack and some shims might not be enough. You might need to have new footings poured or use specialized equipment that can handle a "re-set."
Also, if your home is a double-wide, the process is quite a bit more complicated because you have to manage the marriage line where the two halves meet. If that's the case, and you aren't feeling 100% confident, it's worth the few hundred bucks to have a professional crew handle it.
Keeping it level for the long haul
Once you've got everything straight, do yourself a favor and check it once a year. Most people do this in the spring after the ground has finished its big freeze-thaw cycle.
Keeping the area under your home dry is the best way to prevent future settling. Make sure your gutters are clear and the water is draining away from the foundation. If you keep the soil stable, your home will stay level much longer, and you won't have to spend your Saturday afternoon crawling around in the dirt with a bottle jack nearly as often.