Paved Path Repair Guide

Repairing these issues early prevents minor subsidence from turning into a full-scale excavation project. Whether you have traditional York stone, modern porcelain, or classic block paving, professional repairs ensure your pathway remains level, stable, and free-draining for years to come.

What Does the Work Involve?

• Site Assessment: Identifying the root cause of the damage, such as invasive tree roots, poor drainage, or sub-base failure.
• Lifting and Cleaning: Carefully removing damaged or loose pavers and clearing away old mortar, weeds, and debris.
• Sub-base Rectification: Levelling and compacting the ground using Type 1 MOT or sharp sand to provide a solid foundation.
• Relaying: Setting the pavers back into position, ensuring they are perfectly flush with the surrounding path to eliminate trip hazards.
• Jointing and Pointing: Filling the gaps with kiln-dried sand, sand and cement mortar, or modern polymeric jointing compounds.
• Finishing: Applying a sealant (optional) to protect against future water ingress and moss growth.

Typical Costs

Prices for path repairs vary based on the material used and the extent of the underlying ground issues. Expect to pay a premium for natural stone repairs compared to standard concrete slabs.

Factors that increase the price include difficult garden access, the need to match rare or discontinued paving slabs, and the installation of new drainage channels (such as ACO drains).

How Long Does It Take?

• Single Loose Slab: 1–2 hours including cleaning and re-bedding.
• Small Section (up to 3m²): 4–6 hours, allowing for sub-base compaction.
• Extensive Path Restoration: 1–2 days, depending on the length of the path and the complexity of the pattern.
• Drying Time: Mortar joints typically need 24 hours of dry weather to set fully before being walked upon.

DIY or Professional?

Resetting a single wobbly paving slab is a manageable DIY task for most homeowners with a bag of sharp sand and some cement. However, if large sections of your path are sinking or "rocking," it usually indicates a failure in the sub-base that requires professional compaction equipment.

Professional landscapers have the tools to ensure the correct "fall" is maintained, preventing water from pooling against your house walls and causing damp issues.

Choosing the Right Tradesperson

• Check Qualifications: Look for members of the Association of Professional Landscapers (APL) or the British Association of Landscape Industries (BALI).
• Verify Insurance: Ensure they hold valid Public Liability Insurance (minimum £1 million).
• Ask for Samples: If replacing slabs, ask the tradesperson to provide samples to ensure the colour and texture match your existing path.
• Red Flags: Be wary of anyone who suggests "spot bedding" (using dots of mortar), as this leads to "ghosting" on the surface and slab instability.

Questions to ask:

• How do you intend to prepare the sub-base?
• Will the new jointing material match the colour of the existing path?
• Do you provide a guarantee against the slabs sinking again?
• How will you handle the drainage and water run-off?

UK Regulations

• SUDS (Sustainable Drainage Systems): If you are replacing a large area (over 5m²), the surface must be permeable or drain to a lawn/border to comply with UK planning rules.
• Part M Building Regs: If the path is the main "accessible" route to your front door, it must maintain a minimum width and specific gradient for wheelchair access.
• Waste Disposal: Ensure your tradesperson has a Waste Carrier Licence if they are removing old rubble from your property.

Common Problems

• "Rocking" Slabs: Usually caused by "dot and dab" bedding rather than a full mortar bed; this creates voids where water collects.
• Efflorescence: White salty staining on new repairs; this is natural but should be cleaned correctly to avoid damaging the stone.
• Invasive Roots: Large trees nearby can lift even the heaviest slabs; a root barrier may need to be installed during the repair.
• Freeze-Thaw Damage: Using the wrong mortar mix can cause joints to crack and pop out after a single hard winter.

Frequently Asked Questions

Can you match my old paving slabs exactly?

While we can usually match the size and material, natural stone and concrete weather over time. New slabs will often look brighter initially but will blend in after 6-12 months of exposure to the elements.

Why is my path sinking in one specific area?

This is often caused by a "soft spot" in the soil, a leaking underground pipe, or poor original compaction. A professional will dig out the area and reinforce it with compacted MOT Type 1 stone to stop it from recurring.

Is it better to use sand or mortar for the joints?

This depends on the paving type. Block paving requires kiln-dried sand, while larger slabs usually require a sand/cement mortar or a brush-in resin compound for long-term stability.

Can I repair my path in the winter?

Repairs involving mortar or resin shouldn't be carried out in freezing conditions or heavy rain, as the joints won't set correctly. Dry, mild weather is best for a lasting finish.

How do I stop weeds from growing back in the cracks?

Using a high-quality polymeric jointing sand or resin-based mortar creates a hard barrier that prevents seeds from germinating in the joints, unlike traditional sand.