Local Service Page

Interlock Repair in Hamilton: Fix Shifting Pavers and Weed Growth

Name: Seven Stones Landscape
Address: Hamilton, ON, CA
Telephone: +1 (289) 700-0312
Price range: $$

By Riaad, Owner & Project Manager · ICPI Certified Installer · Last updated May 19, 2026

Searching interlock repair hamilton means you need more than cosmetic patching. We repair shifting pavers, joint failure, and weed-prone interlock by correcting base and drainage issues at the source.

Get a Free Quote +1 (289) 700-0312

What This Page Covers

Lift and relay unstable paver sections
Replace failed bedding/base zones and compact properly
Restore joints and drainage flow for long-term stability

Service Detail

Weed growth in joints is usually a symptom, not the root problem. When interlock moves, joints open and moisture retention rises, creating ideal weed conditions. Proper repair combines structural reset with joint stabilization and runoff correction.

In Hamilton freeze-thaw cycles, quick patch repairs often fail again within one or two seasons. We use a repair-first scope that prioritizes durability over short-term appearance, and where a driveway is past saving we rebuild it to the same standard as our Hamilton interlock driveway installs.

Paver front porch, steps and walkway with contrasting border

Interlock paver driveway installation at a residential brick home

Local Expertise (E-E-A-T)

Project Stats: 25+ related projects completed in Hamilton, ON area.
Local Review: "They fixed the paver movement and weed issue properly. It looks better and feels solid." - Homeowner, Hamilton
Riaad's Pro Tip: If pavers rock underfoot, address base support before adding new joint material.

Frequently Asked Questions

Why do interlock pavers shift so often on Hamilton clay soils?

Lower Hamilton, Ancaster Heights, Dundas and the Mountain neighbourhoods all sit on heavy Queenston and Halton clay that holds winter moisture. When that saturated clay freezes, it expands roughly 9 percent in volume and lifts the base unevenly, then settles irregularly as it thaws. A base built without geotextile fabric and without 6+ inches of compacted 3/4-clear limestone moves every winter. Proper reconstruction with the right depth and fabric stops the cycle.

Why do weeds keep coming back in my Hamilton interlock driveway?

Recurring weeds mean the polymeric joint sand has failed. Three Hamilton-specific causes: (1) original install used regular stone dust instead of polymeric sand; (2) polymeric sand was installed over a moving base and fractured; (3) pavers have exceeded the 5 to 10 year polymeric lifespan. Power-washing out the old sand, allowing joints to dry, then installing Techniseal HP Next-Gel or Alliance Gator Maxx G2 polymeric sand typically eliminates weeds for 5 to 8 years.

How much does interlock repair cost in Hamilton?

Spot lift-and-relay of a 10 to 25 sq ft sunken area: $700 to $1,700. Full polymeric re-sanding of an average Hamilton driveway (500 to 700 sq ft): $1,400 to $2,600. Edge restraint replacement with re-sanding: $2,400 to $4,800. Partial reconstruction of a failed 100 to 200 sq ft zone including base correction: $3,800 to $8,500. Full driveway rebuild with new 6 to 8 inch 3/4-clear base: $55 to $80 per square foot.

Can you match my existing pavers from an older Hamilton installation?

For Unilock Roman Classic, Holland Stone and Brussels Block installed after 2005, matching is usually possible through Unilock's Hamilton distributor. Pre-2005 discontinued colours and Techo-Bloc lines before the current catalogue are harder to match; we typically borrow pavers from an inconspicuous area (under a deck, along a garage wall) and install the new stock there instead. Honest colour expectations are discussed before the quote is signed.

Is interlock repair covered by any warranty or insurance in Hamilton?

Unilock and Techo-Bloc offer transferable lifetime manufacturer warranties on the pavers themselves, but those cover material defect (spalling, manufacturing cracks), not installation failure or settlement. Homeowner insurance rarely covers sinking or shifting interlock because it is classified as wear. Seven Stones Landscape backs every repair with a 5-year workmanship warranty on our work; that is separate from the paver manufacturer warranty.

How fast can you start an interlock repair in Hamilton?

For a free online estimate, we respond within 24 hours with a ballpark range based on photos and measurements. On-site inspections book within 3 to 7 days. Small repairs (lift-and-relay, polymeric re-sanding) often start within 2 weeks of signing. Spring and post-winter repairs fill up by March, so requesting an "interlock repair near me" estimate in February gives the best scheduling options. Seven Stones Landscape is ICPI certified, carries $5M liability and full WSIB, Est. 2013.

Detailed Local Guidance for Interlock Repair in Hamilton: Fix Shifting Pavers and Weed Growth

Most interlock repair calls we take in Hamilton fall into one of three buckets: a sunken section that ponds water, edge pavers creeping out toward the lawn, or joints that grow weeds every June. The fix depends entirely on what is happening under the pavers, so before quoting we pull a few units and look at the bedding sand and base. On the Mountain and through Ancaster, the original installer often skipped geotextile over the clay, and that single omission is what lets the base pump and migrate during thaw. A repair that does not get back down to a clean, fabric-separated 3/4-clear base is a repaint, not a repair, and it will move again before the warranty on it would have expired. Properly rebuilt sections should hold flat for the same 25-plus years good interlock lasts in Ontario.

When you line up bids, the cheap one almost always wins on price by leaving things out. Ask whether the number includes lifting and resetting edge restraint, re-compacting the base in lifts, and polymeric re-sanding, or whether it is just a quick top-up of joint sand. A re-sand alone runs $1,400 to $2,600 on a typical driveway and buys you five to eight years; if the base is the real culprit, that money is wasted within a season. We put the scope in writing so you can see exactly which pavers are coming up, what is staying, and where the water will go once we are done.

Pergola over a paver patio with a built-in fire feature

Techo-Bloc paver walkway with natural stone steps at a front entry

Pool deck pavers with charcoal banding around an inground pool

Planning, Pricing, and Long-Term Value

We scope every Hamilton repair around how far the failure has spread. A single sunken zone of 10 to 25 square feet is a spot lift-and-relay at $700 to $1,700. Once movement runs along the edges or the base has fractured under a wide area, you are into edge-restraint replacement or partial reconstruction, which is $2,400 to $8,500 depending on square footage. If more than roughly a third of a driveway is failing, rebuilding the whole thing on a fresh 6 to 8 inch base usually costs less per year of life than chasing patches, and we will tell you honestly when that line has been crossed.

Two questions separate a real bid from a guess. First, what base depth and compaction method are quoted; on Hamilton clay we want 6-plus inches of 3/4-clear compacted in lifts over fabric, not 3 inches of recycled fill rolled once. Second, where does the water go; a relay that leaves the original drainage problem in place will sink again at the same spot. Joints, edges, and the transition to the garage slab are where freeze-thaw finds the weak link first, so that is where we focus the detailing.

If the driveway is past saving or the same grade issue is affecting the rest of the property, we can fold the repair into a larger plan covering interlock patios retaining walls grading and drainage concrete work and sod restoration. Our problem and solution pages cover specific failure modes if you want to diagnose yours before calling.

Picking the Right Crew for an Interlock Repair

A good sign is a contractor who pulls a paver before quoting instead of pricing off a photo. Ask whether they re-use polymeric sand or specify a current product like Techniseal HP Next-Gel or Gator Maxx G2, and whether they can match your existing Unilock or Techo-Bloc line through the Hamilton distributor. If matching is impossible on an older driveway, an honest answer is borrowing pavers from a hidden spot, not pretending the colour will blend.

Confirm the workmanship warranty is on their installation, not just the manufacturer's defect coverage on the stone, since settlement and shifting are excluded by both paver warranties and most home insurance. We carry a 5-year workmanship warranty, $5M liability, and full WSIB, and we have been doing this in Hamilton since 2013. Ask any crew to show you local repairs at the one and two-year mark, because that is when a rushed relay starts to move again.