There are several methods to level a driveway, depending on the extent of the unevenness and the driveway's material (concrete or asphalt). Here's a breakdown of common approaches:
1. Mudjacking (Slabjacking)
- What it is: Mudjacking, also known as slabjacking, is a traditional method that involves injecting a slurry mixture beneath the sunken concrete slabs. This slurry, typically composed of cement, soil, sand, and water, fills voids and lifts the concrete back to its original level.
- How it works: Small holes are drilled into the concrete slab, and the slurry is pumped through these holes under pressure. The pressure raises the slab, and once it's level, the holes are filled.
- Pros: Cost-effective compared to replacement, minimal disruption, and environmentally friendly.
- Cons: The slurry can shrink over time, potentially leading to future settling. The drilled holes are visible.
2. Polyurethane Foam Injection
- What it is: This method is similar to mudjacking but uses expanding polyurethane foam instead of a slurry.
- How it works: Small holes are drilled, and the foam is injected. As it expands, the foam lifts the concrete.
- Pros: Lightweight, durable, resistant to water damage, and cures quickly. The holes are smaller than those required for mudjacking.
- Cons: Generally more expensive than mudjacking.
3. Asphalt Overlay
- What it is: An asphalt overlay involves applying a new layer of asphalt over the existing driveway. This is typically used for asphalt driveways that have minor surface imperfections.
- How it works: The existing driveway is cleaned and prepped, and a new layer of hot asphalt is spread and compacted.
- Pros: Can improve the appearance and extend the life of the driveway.
- Cons: Doesn't address underlying structural issues. The new asphalt will follow the contours of the old driveway, so significant unevenness will still be apparent. It also raises the height of the driveway which may cause issues with adjacent structures or drainage.
4. Replacement
- What it is: Completely removing and replacing the driveway.
- How it works: The existing driveway is demolished and hauled away. A new base is prepared, and then new concrete or asphalt is poured and finished.
- Pros: Provides a completely new, level surface and addresses any underlying structural issues. Offers the opportunity to improve drainage or change the driveway's layout.
- Cons: Most expensive and disruptive option.
Which method is right for you?
The best approach depends on the severity of the unevenness, the driveway's material, and your budget. For minor settling, mudjacking or polyurethane foam injection are good options. For more severe damage, replacement may be necessary. An asphalt overlay can work for asphalt driveways with only surface issues. It's always best to consult with a professional concrete or paving contractor to assess your driveway and recommend the most appropriate solution.
