7 Best Track Leveling Shims For Uneven Floors That Last

Every homeowner knows the frustration of a kitchen table that dances every time a glass is placed on it or a refrigerator that rattles against a slight floor dip. These minor annoyances often signal bigger structural issues, but they are frequently solved with a quick, inexpensive adjustment. Choosing the right leveling tool saves hours of headache and protects expensive appliances from long-term wear caused by uneven weight distribution.

Wobble Wedges: Best for Toilets and Appliances

When a toilet rocks against the tile or a heavy washing machine causes vibration during the spin cycle, the floor underneath is rarely perfectly level. Wobble Wedges are designed with a unique flexible, yet rigid plastic material that grips surfaces without slipping. Their tapered design allows for precise height adjustments, making them ideal for high-pressure areas where standard wooden shims might splinter.

Because they are made from specialized polymers, these shims are resistant to moisture, water rot, and chemical cleaners. This makes them the gold standard for bathrooms, laundry rooms, or damp basements where wood would eventually degrade. They come in various sizes, so purchasing a multi-pack ensures you have the right fit for both heavy-duty appliances and smaller, delicate furniture.

The main tradeoff here is the visibility of the plastic, as it does not paint over as cleanly as wood. However, the trade-off is worth it for the long-term structural integrity they provide. Bottom line: if you need a “set it and forget it” solution that won’t rot in humid conditions, these are the top choice.

Nelson Wood Shims: For Classic Carpentry Jobs

When the task involves installing door frames, window casings, or sub-flooring, traditional cedar wood shims remain the most effective tool. Cedar is preferred because it is soft enough to be easily trimmed with a utility knife but durable enough to maintain its shape under a load. The natural fibers also provide high friction, ensuring that once a door frame is plumb, the shim stays locked in place.

These shims are usually sold in large bundles, making them the most economical choice for extensive home renovation projects. They are particularly well-suited for situations where the shim will be hidden behind trim or drywall, as their natural wood composition allows for easy sanding and painting if they happen to remain visible. Because they are porous, they absorb adhesives and wood glue, creating a bond that is essentially permanent.

Keep in mind that cedar shims are not moisture-proof; they should never be used in standing water or against exterior concrete slabs without a moisture barrier. For interior finish work and framing, they offer the best balance of cost and performance. Bottom line: stick to cedar for framing projects where you need to create a custom, paintable finish.

EZ-Shim Interlocking Shims: For Doors & Windows

Installing doors and windows requires a delicate balance of precision and speed. The EZ-Shim system features an interlocking teeth design that allows for fine-tuned leveling without the need for constant cutting and re-adjusting. By sliding two pieces against each other, the thickness changes incrementally, which is far more accurate than tapping a wedge further into a gap.

These are particularly useful for those who do not have professional-grade tools or the steady hand required to shave down wood shims perfectly. The interlocking design ensures they don’t slip out of place while you are in the middle of fastening a window frame or hanging a heavy interior door. They are made from high-impact plastic, meaning they can handle significant weight without compressing.

While the upfront cost is higher than a bulk pack of wooden shims, the time saved in labor makes them a favorite for weekend warriors. If you are a homeowner tackling a door installation solo, this system removes the guesswork. Bottom line: if precision and ease of use are your priorities, the interlocking mechanism is worth the extra investment.

Ideal Security Shims: Your Go-To for Everyday Fixes

Sometimes the issue isn’t a major renovation but a wobbly desk, a tilting bookshelf, or a kitchen island that needs a slight adjustment. Ideal Security shims offer a versatile, medium-duty solution that bridges the gap between specialized construction shims and makeshift cardboard fixes. They are designed to be thin and manageable, making them perfect for “junk drawer” storage.

These shims are generally made from hard plastic and come in a standard length that fits under most standard furniture legs. They are easy to stack if you need an extra sixteenth of an inch, yet they remain low-profile enough to be discreet. Their durability makes them suitable for high-traffic areas, and they won’t scratch hardwood or luxury vinyl tile floors.

Unlike cedar shims, these do not require trimming, which saves you from potential cleanup or accidental damage to your floors. If you want a quick fix that doesn’t involve specialized carpentry skills, these are the most reliable option for the general homeowner. Bottom line: keep a pack of these on hand for the inevitable wobbles that occur with daily use of furniture.

Stalwart Leveling Kit: Best All-Purpose Plastic Set

For those who want a comprehensive solution without having to guess which size to buy, a multi-piece leveling kit is the best approach. These kits typically include a variety of shims in different thicknesses and colors, allowing for a color-coded or size-based organizational system. This is especially helpful for large homes with multiple leveling needs, from bedroom furniture to kitchen cabinets.

The convenience of an all-purpose kit lies in the variety; having several shapes, including wedges and flat plates, means you can address both angled gaps and level gaps. Because they are made of durable PVC, they are essentially immune to the common pests and rot that plague wooden alternatives. The storage case or bag included with most kits also prevents these small items from getting lost in a garage or shed.

One consideration is that these kits can occupy more storage space than a simple bundle of wood shims. However, the accessibility of having the exact thickness needed for any project outweighs the minor footprint in a workshop cabinet. Bottom line: if you prefer to be fully prepared for any household surprise, a complete plastic kit is the most logical purchase.

Rok Hardware Soft Shims: For Scratch-Free Leveling

Hard plastic or wood shims can sometimes leave marks on sensitive flooring materials like polished hardwood or high-gloss ceramic tiles. Rok Hardware produces soft, flexible shims that act as a cushion between the heavy weight of an object and the floor. This softness allows the shim to conform slightly to the floor’s surface, distributing weight more evenly.

This is a critical advantage when you are leveling heavy, high-end furniture or appliances placed on delicate surfaces. The material provides just enough “give” to prevent the pressure-point damage that rigid plastic shims might cause. They are also non-slip, which adds an extra layer of stability for appliances that move during operation.

While they are slightly more expensive per unit than standard plastic, the protection they offer your floors is a form of insurance. They are less suitable for heavy construction framing but are superior for final-touch furniture placement. Bottom line: choose these when the safety of your floor surface is just as important as the stability of the object.

PC-Crete Epoxy Putty: For Permanent Concrete Fixes

Concrete floors are notorious for being uneven, and sometimes a simple shim will fail to provide a stable, long-lasting surface. In cases of large, localized dips, a moldable epoxy putty like PC-Crete can act as a custom-fitted shim. Once applied and allowed to cure, it becomes rock-hard and can support immense weight without crushing or shifting.

This method is ideal for garage floors, heavy machinery stands, or basement laundry areas where moisture and concrete contact are issues. Unlike a shim that only supports one point, epoxy putty fills the void completely, providing 100% surface contact. This eliminates the risk of the shim being kicked or knocked out of place over time.

Be aware that using epoxy is a permanent fix; it is not easily removed once hardened. Therefore, this should be reserved for scenarios where the leveling need is unlikely to change in the future. Bottom line: use epoxy putty when you need a permanent, high-load bearing foundation that won’t move or rot.

Wood vs. Plastic Shims: Which Is Right for You?

Choosing between wood and plastic is the first decision every homeowner must make. Wood shims, particularly cedar, are excellent for finish carpentry because they bond well with glue, take paint easily, and are very inexpensive when bought in bulk. They are the traditional choice for anyone framing walls or installing baseboards where the shim will be covered.

Plastic shims are the modern standard for utility, moisture resistance, and heavy-duty load-bearing. If you are dealing with a bathroom, a kitchen, or any area where a leak or humidity might occur, plastic is the superior choice. Plastic shims will not expand or contract with temperature changes or humidity levels, which makes them more stable in long-term applications.

Ultimately, your choice should depend on the location and the visibility of the shim. If it’s going under a couch leg in a living room, a stackable plastic shim is easier to adjust. If it’s going behind a door frame to be trimmed and painted over, wood is the industry standard. Bottom line: choose wood for hidden carpentry and plastic for exposed, high-traffic, or damp locations.

How to Properly Install Shims for a Solid Fix

A solid fix requires more than just pushing a shim under a leg and walking away. First, use a level—a simple bubble level is sufficient—to determine exactly how much rise is needed on the low side of the object. You want to ensure the weight is distributed across the shim so the object is stable, not just propped up on a thin edge.

If you are using a wedge-style shim, gently tap it into place with a light hammer to ensure it is snug; do not force it, as you can accidentally raise the object too high or crack the shim. Once the level is accurate, you may want to trim the excess material. For wood, use a sharp chisel or utility knife; for plastic, a hacksaw or heavy-duty snips will do the trick.

If the object is likely to be bumped or moved, consider using a dab of construction adhesive or a small nail to keep the shim in place. This prevents the shim from “walking” out over time due to vibrations or daily use. Bottom line: take the extra minute to level accurately and secure the shim, as a half-measured fix will only need to be redone later.

When a Simple Shim Isn’t Enough for Your Floor

Sometimes, a wobbly floor is a symptom of a larger, underlying issue, such as a sagging joist or a damaged subfloor. If you find yourself needing to stack shims higher than an inch, or if multiple areas of the same room are consistently uneven, you may have a structural problem. In these instances, a shim is merely a bandage, not a cure.

Large-scale floor unevenness may indicate foundation settling or water damage that requires professional evaluation. If you notice cracks in your drywall, doors that refuse to latch, or floors that feel “springy” when walked upon, stop and consider a structural inspection. These indicators suggest the floor support system is failing, and a simple plastic shim cannot provide the necessary long-term reinforcement.

Use shims to solve the immediate annoyance of a wobble, but remain observant of the surrounding environment. If the floors seem to be changing over time, document it and consult a contractor. Bottom line: shims are for fine-tuning, not for correcting major structural defects; always prioritize the safety of your home’s foundation.

Equipping your toolkit with a variety of leveling solutions ensures that you are never caught off guard by a rattling appliance or an uneven door frame. While the initial choice between wood and plastic may seem small, selecting the right material for the specific environment will save you from repeat work and potential damage. Use these reliable products to create a solid, stable home environment that lasts for years.