Leveling blocks

Leveling blocks are stacked under one or more tires to raise that side or corner of the RV until the coach sits level. A level RV matters for more than comfort, since refrigerators, and in some cases slide-out mechanisms, are designed to operate within a limited range of tilt.

Most leveling blocks are interlocking plastic pieces that stack to the needed height, though curved plastic ramps and permanently mounted hydraulic or electric leveling systems are common upgrades on larger rigs. Blocks are typically used alongside separate stabilizer jacks, which steady the RV against rocking but are not meant to lift or level it.

A common mistake is confusing leveling blocks with stabilizer jacks and expecting jacks alone to correct a significant slope, which can stress the jack mounts. Checking level with a bubble level or phone app before driving onto the blocks, rather than after, saves repeated back-and-forth parking attempts.