How to Re-Level Sunken Block Paving: A Step-by-Step DIY Guide

Updated at: 26/05/2025

Sunken block paving is an unsightly and potentially dangerous problem, turning a once-attractive driveway or patio into a tripping hazard. Uneven paving stones not only detract from the aesthetic appeal of your outdoor space but can also damage your lawnmower wheels and cause discomfort when walking. Thankfully, re-levelling sunken paving is a manageable DIY project, saving you the expense of hiring professional landscapers. This often involves a little bit of elbow grease but requires no specialist tools and can be accomplished within a weekend for smaller areas.

This guide provides a comprehensive, step-by-step approach to successfully lifting and re-levelling your sunken paving blocks. We'll cover everything from assessing the damage and selecting the right materials to ensuring a long-lasting, even finish. Let's get started with the first step in transforming your uneven paving back into a smooth, safe surface.

Preparation and Safety Guidelines

Tools Needed
  • Sharps
  • Rubber mallet
  • Plank of wood
  • Thick screwdriver
  • Sand
Safety Guidelines
  • Always wear appropriate safety gear, including safety glasses, gloves, and sturdy footwear. Working with heavy materials and tools requires caution to prevent injuries.
  • Before starting any work, mark out the affected area clearly and ensure you have the necessary tools and materials to hand. This avoids unnecessary interruptions and potential hazards.
  • If you're unsure about any aspect of the process, consult a professional. Improperly leveling paving can cause further damage and safety risks.

Step-by-Step Instructions

  1. Preparation

    • Take a picture of the block layout.
    • Remove one block; the rest are easier to remove after the first one.
    Remove one block; the rest are easier to remove after the first one.Remove one block; the rest are easier to remove after the first one.
    Preparation

  2. Block Removal

    • Identify the sunken area and remove the blocks needing re-leveling.
    • Scrape off debris and sand from the removed blocks.
    Scrape off debris and sand from the removed blocks.Scrape off debris and sand from the removed blocks.
    Block Removal

  3. Sanding and Leveling

    • Add sand to the sunken area. (The video used a bag and a half of sand for the shown area).
    • Level the sand; ensure the blocks sit a couple of millimeters higher than the surrounding level blocks once placed.
    Level the sand; ensure the blocks sit a couple of millimeters higher than the surrounding level blocks once placed.Level the sand; ensure the blocks sit a couple of millimeters higher than the surrounding level blocks once placed.
    Sanding and Leveling

  4. Block Replacement

    • Place the blocks back in, using a plank of wood and rubber mallet to level and compact them. Avoid hitting the blocks directly with the mallet.
    • Ensure all blocks are secure and level to prevent further sinking.
    Ensure all blocks are secure and level to prevent further sinking.Ensure all blocks are secure and level to prevent further sinking.
    Block Replacement

  5. Addressing Multiple Sunken Areas

    • Repeat the process for any additional sunken areas, potentially working in smaller sections for easier reassembly.
    • Use the reference photo to ensure correct block placement.
    Use the reference photo to ensure correct block placement.Use the reference photo to ensure correct block placement.
    Addressing Multiple Sunken Areas

  6. Severe Sunken Area Repair

    • For severely sunken areas with significant gaps, consider adding a sub-base of bricks before adding sand and blocks.
    For severely sunken areas with significant gaps, consider adding a sub-base of bricks before adding sand and blocks.
    Severe Sunken Area Repair

Read more: Reinforce Wobbly Deck Railings: The Lag Bolt Method

Tips

  • Take a picture of the original layout before removing any blocks.
  • Work in smaller sections if dealing with a large area to simplify reassembly.
  • Use a plank of wood and rubber mallet to avoid damaging the blocks during compaction.
  • Add sand gradually as needed rather than removing excess sand.

Common Mistakes to Avoid

1. Insufficient Base Preparation

Reason: A weak or uneven base will cause the paving to settle again quickly. This is often due to using insufficient sub-base material or compacting it inadequately.
Solution: Ensure a firm, compacted sub-base of suitable depth and material, using a plate compactor for best results.

2. Ignoring Underlying Issues

Reason: Settling paving is often a symptom of a larger problem, such as tree roots, poor drainage, or ground movement. Fixing the paving without addressing the underlying cause will lead to repeated sinking.
Solution: Identify and rectify the root cause of the problem before attempting to re-level the paving.

FAQs

What's the best material to use for raising sunken paving blocks?
A good option is a sharp sand and cement mix. This provides a stable base and helps to lock the paving stones in place. Alternatively, you can use paving resin, which is a quicker but more expensive solution. Avoid using soil as it can settle and cause the problem to reoccur.