Halton Hardscape Guide · 2026

Interlock Cleaning, Resanding and Sealing Cost in Halton: 2026 Service Guide

By Riaad, Owner & Project Manager · ICPI Certified Installer · Published 2026-05-04

If your interlock patio or driveway is between 5 and 15 years old, the joints are fading, weeds are creeping in along the edges, and the surface looks dull, you are not looking at a failed installation. You are looking at the normal point in an interlock surface lifecycle when it needs service. This guide covers what that service actually costs in Halton in 2026, how often you should be doing it, which polymeric sand brands work best on local supply, and a real Burlington case study with itemised line costs.

Most existing online guides on interlock cleaning and sealing are either US-focused (USD pricing, US service rates) or Ottawa-focused. None publish current 2026 CAD per-square-foot service rates for Halton, none compare the polymeric sand brands available at Toemar, Permacon, or Grand River Stone, and none address Hamilton hard-water staining specifically. This one does.

When Does Interlock Actually Need Service? A Visual Checklist

Walk your interlock surface and check for these signs. Two or more in the affirmative means the surface is due for resand and reseal. Three or more means it is overdue.

Joint sand depth more than 1/4 inch below the paver top surface
Visible weeds growing in 5 percent or more of the joints
Efflorescence (white-grey haze) on any paver face
Polymeric sand crumbling or chunking out when prodded with a screwdriver
Sealer no longer beads water (water absorbs into the paver instead of beading on the surface)
Surface visibly faded compared to original install colour
Loose pavers anywhere along the edges (separate problem from sand, but worth noting)

The Standard 5-Step Halton Restoration Process

Step 1: Pressure wash the entire surface at 2,500 to 3,000 PSI with a 25-degree fan tip held 12 inches off the paver. Goal is to remove old sand, dirt, weed roots, and surface dirt. Time: 1 hour per 200 sq ft.

Step 2: Inspect joints for depth and integrity. Where remaining polymeric sand is failed or fragmented, sweep it out with a stiff broom. Where joint depth exceeds 1/4 inch below the paver surface, plan additional sand volume.

Step 3: Apply efflorescence remover if needed (Hamilton hard-water zones, pavers older than 5 years, or any visible white haze). Sure-Klean 600 or Techniseal Cleaner. Allow 30 minutes contact time then rinse.

Step 4: Sweep polymeric sand into joints. Use Gator Supersand G2, Techniseal NextGel, or SEK-1G depending on conditions. Activate with light water spray (mist setting only, never a hard spray that washes sand out). Allow 24 hours for sand to cure to required hardness.

Step 5: Apply water-based or solvent-based sealer in even thin coats. Two coats is standard; allow 4 hours between coats. Allow 24 hours after second coat before normal foot traffic, 48 hours before vehicle traffic on driveways.

2026 CAD Service Pricing in Halton

Service tier	Cost per sq ft	What is included
Clean only	$1.25 to $2.00	Pressure wash, weed kill, light efflorescence treatment
Clean + resand	$2.00 to $3.50	Above plus polymeric sand replacement (Gator G2 or equivalent)
Clean + resand + seal	$3.50 to $5.50	Above plus 2-coat sealer application
Premium (heavy efflorescence)	$5.50 to $8.00	Above plus Sure-Klean acid wash and full restoration

Driveway service typically lands at the higher end of each range due to the additional time required to maintain vehicle access. Sealed driveways need 48 hours of dry time between sealer application and vehicle traffic.

Polymeric Sand Brand Comparison

Three brands dominate Halton supplier shelves in 2026 (Toemar Burlington, Permacon Oakville, Grand River Stone Hamilton, Brock Aggregates Stoney Creek):

Gator Supersand G2: $35-42 per 18 kg bag. Coverage 75-100 sq ft for 1/4-inch joints. Cures harder than competitors, less efflorescence on Hamilton hard-water zones. Our default for everything that is not pool-adjacent.

Techniseal NextGel: $38-45 per bag. Coverage 80-100 sq ft. Best for pool surrounds (chlorine-rated), polymer cures with built-in mildew resistance, slightly more flexible than G2 (handles more freeze-thaw movement before cracking). Our default for pool decks and shaded patios.

SEK-1G: $30-38 per bag. Coverage 65-85 sq ft. Solid mid-tier option for backyard patios. Slightly faster cure time than G2 (12 hours vs 24). We use SEK on budget-conscious projects.

Avoid the unbranded "construction sand" or "stone dust" sold at big-box stores for paver joints. Both will fail in 6 to 18 months in Halton freeze-thaw and need to be redone.

Sealer Types and What Survives Halton Winters

Three sealer categories matter in 2026:

Water-based film-forming sealers (Techniseal Wet-Look, Surebond SB-1300, Alliance Last-N-Lock): $0.85 to $1.25 per sq ft material cost. Glossy or matte finish. Easier to apply, lower VOC, friendlier to plants and pets. Typical lifespan 3 to 4 years in Halton before reapplication. Our default for backyard patios and pool decks.

Solvent-based film-forming sealers (Surebond SB-7000, BASF MasterProtect): $1.10 to $1.55 per sq ft material cost. Strongest UV and salt resistance. Typical lifespan 4 to 6 years. Higher VOCs, requires careful weather-window application. Our default for driveways and salt-exposed surfaces.

Penetrating sealers (Defy Stone Tile and Concrete, Surebond SB-100): $0.65 to $1.00 per sq ft material cost. No surface film, soaks into the paver, no gloss. Best for natural-stone surfaces (flagstone, limestone) where homeowners want the natural matte look preserved. Typical lifespan 3 to 5 years. Our default for natural-stone walkways and patios.

Real Burlington Case Study, 600 sq ft Aldershot Patio (Year 7)

A 600 sq ft back-yard interlock patio in Aldershot, Burlington was installed in 2018 with Unilock Beacon Hill Smooth pavers and the original Gator Supersand (pre-G2). The homeowner contacted us in 2025 reporting joint sand loss of approximately 35 percent, weeds in 12 percent of joints, no efflorescence visible.

Service performed in May 2025 over 2 days:

Pressure wash at 2,800 PSI: $420
Polymeric joint sand removal of failed material: $180
Gator G2 application (15 bags at $36 each): $540 materials + $240 labour
48-hour cure
Water-based sealer application (Techniseal Wet-Look, 8 gallons at $42 each): $336 materials + $264 labour

Total invoice: $1,980. Result: patio surface restored to near-original appearance, polymeric joints fully reset, sealer adding 4 to 5 years of weather protection. Next major service projected 2030.

DIY vs Hire-a-Pro Decision Tree

DIY makes sense if all of the following are true:

Surface is under 300 sq ft
You already own a 2,500-3,000 PSI pressure washer
Joint depth is uniform (less than 1/4 inch loss)
You have 3 dry days in a row in the forecast
You are comfortable with sealer application technique (even thin coats, no puddles)

Hire a pro if any of the following are true:

Surface is over 400 sq ft, especially driveways
Joint depth varies (more than 1/4 inch loss in spots)
Visible efflorescence or hard-water staining
Natural-stone surfaces (flagstone, Wiarton limestone) which need lower-PSI handling
Pool deck (chlorine-rated polymeric sand and care around the basin)
Heritage paver surfaces where mistakes are expensive

Common DIY Mistakes

Sealing too early after a fresh install: the polymeric sand needs 60 to 90 days of curing before the first seal coat. Sealing immediately traps moisture and clouds the paver surface permanently.

Pressure washing too close or too high PSI: 4,000 PSI at 6 inches off the surface erodes polymeric sand in 30 seconds and can pit softer pavers. Stay at 2,500 to 3,000 PSI with a 25-degree tip held 12 inches off.

Wet pavers when applying polymeric sand: the sand will stick to the wet surface and create a film that looks terrible. Wait until the surface is bone-dry, sweep sand into joints, then mist activate.

Wrong sealer for the surface: solvent-based sealer on shaded pavers can leave a sticky film that traps debris. Water-based sealer on driveways may need annual touch-up where solvent-based would have lasted 4 to 6 years. Match the sealer to the surface and exposure.

Maintenance Schedule by Year

Year	Recommended action	Typical cost (500 sq ft patio)
Year 0 (install)	Polymeric sand applied during install	Included in install
Year 1	First sealer application (after 60-90 day cure)	$500-$750
Year 3	Light clean and weed treatment	$300-$500
Year 5	First full resand and reseal	$1,750-$2,750
Year 8	Light clean and sealer touch-up	$400-$700
Year 10	Full resand and reseal	$1,750-$2,750

Total 10-year maintenance cost: roughly $4,700-$7,450 on a 500 sq ft patio that originally cost $14,000-$22,000 to install. About 4-7 percent annual ownership cost.

How to Vet a Halton Interlock-Restoration Contractor

Ask these five questions before signing:

Are you ICPI certified? (Interlocking Concrete Pavement Institute certification is the industry standard. Members listed at icpi.org/find-a-contractor.)
What polymeric sand brand do you use and why? (Should answer specifically: Gator G2 / Techniseal NextGel / SEK and the reasoning per surface type.)
What PSI do you pressure wash at and what tip do you use? (Should answer 2,500-3,000 PSI with a 25-degree fan tip. Anything over 3,500 PSI is a red flag.)
What sealer do you recommend and why? (Should match the surface: water-based for shaded patios, solvent-based for driveways, penetrating for natural stone.)
What is your written warranty on the resand and seal work? (Should be 1 to 2 years on polymeric joint integrity and 2 to 3 years on sealer adhesion.)

Frequently Asked Questions

How much does interlock cleaning and sealing cost per sq ft in Halton in 2026?

For 2026 in Hamilton, Burlington, Oakville, and Milton: clean-only service runs $1.25 to $2.00 per square foot, full resand (clean plus polymeric sand replacement) runs $2.00 to $3.50 per square foot, and full clean plus resand plus seal runs $3.50 to $5.50 per square foot. A typical 500 sq ft Burlington patio at the full-service tier costs $1,750 to $2,750 in 2026, depending on access, paver age, and joint depth.

How often should interlock be resanded and sealed in Ontario?

For Halton conditions: full resand every 4 to 6 years, sealer reapplication every 3 to 5 years, basic clean and weed treatment every 1 to 2 years. The 5-year resand-and-reseal cycle is the standard for Burlington and Oakville interlock. Hamilton driveways take a harder beating from road salt and may need annual sealer touch-up after year 8.

What polymeric sand brand should I use on Halton interlock?

Three brands dominate the Halton supplier network in 2026: Gator Supersand G2 ($35-42/bag, covers 75-100 sq ft), Techniseal NextGel ($38-45/bag, covers 80-100 sq ft), and SEK-1G ($30-38/bag, covers 65-85 sq ft). For Hamilton/Stoney Creek hard-water conditions we specify Gator Supersand G2 because it cures with less efflorescence than competing brands. For pool surrounds we use Techniseal NextGel which is rated for chlorinated environments. SEK is a solid budget option for backyard patios away from pools or hard-water zones.

When should I seal new interlock for the first time?

Wait 60 to 90 days after a new interlock install before applying any sealer. That gives the polymeric sand time to fully cure and lets efflorescence work itself out of the pavers. After the first sealing, plan to re-sand and reseal every 3 to 5 years depending on traffic volume and sun exposure. Sealing too early traps moisture and can cloud the paver surface permanently.

Can I clean and seal interlock myself or should I hire a pro?

For backyard patios under 300 sq ft with intact polymeric joints, DIY clean-and-seal is reasonable and runs $200 to $500 in materials. For driveways, larger patios over 400 sq ft, areas with significant joint loss, weed growth, or polymeric sand failure, a professional service is more cost-effective long-term because the equipment (pressure washer at correct PSI, blower, sand spreader, sprayer) and the technique (joint depth check, dry-time management, even sealer coat) are hard to match without practice.

Will pressure washing damage my interlock pavers?

Pressure washing at the wrong PSI is the most common DIY mistake. Use 2,500 to 3,000 PSI maximum on concrete pavers, with a 25-degree fan tip held 12 inches off the surface. Higher PSI or closer distance erodes the polymeric sand out of the joints (creating the very problem you are trying to fix), and on softer pavers can pit the surface. Natural stone (Wiarton flagstone, Indiana limestone) tolerates lower PSI 1,500 to 2,000 with a 40-degree tip.

Real Burlington case study: 600 sq ft patio in Aldershot, year 7

A 600 sq ft Aldershot back-yard interlock patio installed 2018, Unilock Beacon Hill Smooth pavers, original polymeric sand was Gator Supersand original (pre-G2). Joint loss was approximately 35 percent at year 7, weeds in 12 percent of joints, no efflorescence. Service in 2025: pressure-wash at 2,800 PSI ($420), polymeric joint sand removal of remaining failed material ($180), Gator G2 application ($580 in materials, $240 in labour), 48-hour cure, water-based sealer application ($340 in materials, $220 in labour). Total: $1,980. Result: another 5 to 7 years before next major service.

What about hard water staining and efflorescence in Hamilton?

Hamilton municipal water has moderate hardness (around 130-150 mg/L). When pavers get soaked by sprinklers or hard-water rain runoff, mineral deposits can build up over 3 to 5 years and show as white-grey haze on the paver surface. The fix is an efflorescence remover (Sure-Klean 600, Techniseal Cleaner & Degreaser) applied before resand and reseal. We add this step on every Hamilton service quote where efflorescence is visible.

How long does professional interlock service take?

A 500 sq ft full clean-resand-seal service takes 1.5 to 2 days on site: day 1 morning is pressure wash and joint cleanout, day 1 afternoon is polymeric sand application and water activation, day 2 morning is sealer application after the joints have set, then 24 hours of drying before normal use. Driveway service may extend to 2.5 days because we need to keep vehicles off the surface during sand cure.

Do you offer free quotes for Halton interlock service projects?

Yes. We offer a free on-site assessment across Hamilton, Burlington, Oakville, Milton, Mississauga, Ancaster, Dundas, Stoney Creek, and Waterdown. Site visit includes joint-depth measurement, weed and efflorescence assessment, sealer condition check, and a written firm-price quote within 2 business days. Free online estimate with 24-hour response for homeowners who want a budget figure based on rough sq ft and paver age.

Free on-site consultation across Halton. Hamilton, Burlington, Oakville, Milton, Mississauga, Ancaster, Dundas, Stoney Creek, and Waterdown. Get a free quote