A landscaping warranty is the difference between a $40,000 patio that gets fixed when it settles and one that becomes your problem in year two. In Ontario, workmanship and material warranties are two separate things, and most reputable contractors offer both. The trouble is that quotes rarely spell out the terms, and verbal promises evaporate the moment something fails. This guide explains what is standard across Hamilton, Halton and Niagara in 2026, what to demand in writing, and which exclusions are legitimate versus which ones are red flags.
Quick verdict
Expect 1 to 3 years of workmanship coverage on hardscape, decks and fences from any contractor worth hiring in Ontario. Plants from Landscape Ontario members carry a 1-year replacement guarantee, and paver, block and lumber manufacturers add 10 to lifetime years on the material itself. If a quote does not mention warranty terms at all, treat that as a refusal. Get every promise on the signed contract, not on a business card or a text message.
Standard warranty terms by project type (2026 Ontario)
| Project | Workmanship warranty | Plant or material warranty | What is excluded |
|---|---|---|---|
| Interlock patio or driveway | 2 to 3 years on settling, heaving, joint failure | Lifetime transferable on the pavers (Unilock, Techo-Bloc, Permacon, Oaks) | Efflorescence, salt damage, staining, weed growth in joints after year 1 |
| Segmental retaining wall | 2 to 5 years on bulging, leaning, structural failure | Lifetime on the block (manufacturer) | Damage from added load, vehicles, irrigation leaks, surcharge from new structures |
| Wood or composite deck | 1 to 2 years on framing, fasteners, post settlement | 25 to 50 years on composite boards, manufacturer terms on PT lumber | Natural cedar checking, board cupping, fading, mildew, deck stain wear |
| Cedar or PT fence | 1 to 2 years on posts, gates, hardware | Manufacturer terms on hardware and pickets | Wood movement, knotting, colour change, wind damage above code load |
| Sod installation | 30 to 60 days if you water as instructed | Grower terms (rarely passed through) | Drought stress, pet urine, fungus, missed watering, foot traffic damage |
| Plants, trees, shrubs | 1 year replacement (LO member standard) | 1 year, one-time replacement | Improper watering, animal damage, transplant after install, vandalism |
| Drainage, French drain, swale | 2 to 5 years on grading and flow performance | Manufacturer terms on pipe and fabric | Clogs from silt, ice damming, downspout overload, changes to neighbouring grade |
Workmanship versus material warranty (they are different)
The workmanship warranty covers how the work was installed. If pavers settle because the base was undercompacted, or a retaining wall leans because no geogrid was used, that is a workmanship claim against the contractor. The material warranty covers defects in the product itself, like a paver that spalls or a composite board that delaminates. Those claims go to the manufacturer, and the contractor usually helps you file them.
Why this matters: a contractor who says “Unilock has a lifetime warranty, so you are covered” is dodging the real question. Unilock will not pay to lift and reset 600 square feet of patio when your contractor undercompacted the base. The workmanship piece is what protects you against bad install, and it has to come from the company holding the trowel. Always ask the two questions separately, and get both answers in writing on the contract.
Settling, heaving and the 1-inch rule
Interlock and natural stone will settle a little. That is physics. The industry standard most Ontario installers use is that more than 1/2 inch of differential settlement within the first 2 to 3 years is a warranty event. Less than that is considered normal, especially over the first winter freeze-thaw cycle. Frost heave in spring that returns to grade by mid-summer is also normal. Permanent heave that does not settle back is not.
A proper base, 6 to 8 inches of compacted 3/4 clear or HPB under a patio and 10 to 12 inches under a driveway, prevents most settling. If a contractor warranties only 1 year on settling, they are signalling that they do not trust their own base. The 2 to 3 year coverage is industry standard for a reason: that is how long it takes for a bad base to reveal itself.
Polymeric sand and joints
Polymeric sand is the binder in interlock joints. It hardens when wet and keeps weeds out and ants from undermining pavers. Most contractors warranty the polymeric sand for 1 year. After that, you may need a top-up every 3 to 5 years depending on traffic, drainage and freeze-thaw. That is maintenance, not warranty.
What is warranty: joints that wash out within the first year because the sand was installed wet, in cold weather, or without proper compaction. What is not warranty: efflorescence (the white haze from calcium leaching, which is cosmetic and self-resolves), weed seeds blown in from neighbouring yards, and damage from pressure washing on the wrong setting. Ask which polymeric brand they use. Techniseal HP NextGel, Alliance G2 and Gator Maxx are the three most common 2026 choices, and all three have published manufacturer guarantees you can read online.
Deck wood and fence posts
Pressure-treated lumber from a reputable Ontario yard carries a manufacturer warranty against rot and insect damage, typically 25 years for ground-contact PT. Cedar has no rot warranty by nature, but the workmanship warranty should still cover post settlement, sagging beams, and improperly fastened framing for at least 1 to 2 years. Composite decking (Trex, TimberTech, Fiberon) carries 25 to 50 year manufacturer warranties on the board itself.
Fence posts are the most common failure point and the most common warranty fight. A 6-foot cedar fence with posts set in concrete in undisturbed soil should not lean within 2 years. If it does, that is workmanship: either insufficient depth (Ontario standard is 4 feet to get below frost), undersized footing, or post-end rot from not using PT for the buried section. Demand a 2-year post warranty in writing. Anything less means they know the posts are going to move.
Plant warranty: the 1-year Landscape Ontario standard
Landscape Ontario members offer a 1-year, one-time replacement guarantee on trees, shrubs and perennials they supply and install. That means if the plant dies within 12 months from natural causes, they replace it once. You pay nothing for the plant, and most include the labour. If you supply the plant yourself, there is no warranty. If you install it yourself even from their nursery, no warranty.
Exclusions are standard and reasonable: you have to water as instructed (usually a watering schedule is included on the invoice), no pet damage, no transplant within the first season, no vandalism, no act of God. A 2-year plant warranty is a nice upsell but rare. Anything less than 1 year from a supplied and installed plant means the contractor is not a Landscape Ontario member or is cutting corners on the guarantee.
What voids the warranty
Every contract has exclusions, and most of them are fair. The legitimate ones: damage from snow plows, salt application, vehicles driving on patios not rated for vehicle load, irrigation leaks under hardscape, third-party work that disturbs the install (new fence post drilled through paver base), changes to drainage on neighbouring properties, and acts of God like extreme storms or flooding above 100-year events.
Watch out for sneaky exclusions: “warranty void if any modification is made” can be used against you for changing a planter. “Warranty void if not maintained by contractor” is a lock-in tactic. “Warranty void if homeowner walks on it within 7 days” is real for fresh polymeric sand but should be specific. Read the exclusions carefully and ask for clarification on anything vague before you sign.
How to apply this on your project
Before you sign anything, work through this checklist with your contractor:
- Get the workmanship warranty term and what it covers, in writing, on the contract itself (not a brochure).
- Confirm the contractor is a Landscape Ontario member if plants are part of the scope.
- Ask for the manufacturer warranty paperwork for pavers, blocks, composite, polymeric sand and any other branded materials.
- Read the exclusions and ask for clarification on any vague phrasing.
- Confirm who handles warranty claims (the contractor should, not you direct to the manufacturer).
- Ask if the warranty is transferable if you sell the home within the term. Most paver warranties are. Workmanship usually is not.
- Keep a copy of the signed contract, the material brand list, and any care instructions for the full warranty period.
Common mistakes we see on quote reviews
- Homeowner accepts a verbal warranty and never gets it in writing, then has no recourse when something fails.
- Contractor quotes “lifetime warranty” without specifying it is the manufacturer (not them) and excludes workmanship entirely.
- Plant warranty is offered but the homeowner buys the plants separately from a big box, voiding the install warranty.
- Polymeric sand warranty is assumed to be 5 years (it is 1) and the homeowner is shocked when joints need topping up in year 2.
- Fence post warranty is 1 year, posts heave in year 2, and the homeowner pays again to dig and reset.
- Warranty paperwork lists the contractor name but no business address, phone or email, making claims impossible.
- The contract says “industry standard warranty applies” with no actual terms. That phrase is legally meaningless.
Frequently asked questions
Is a landscaping warranty required by law in Ontario?
No. Warranty terms are contractual, not statutory. The Consumer Protection Act covers basic fitness-for-purpose and merchantability, but specific warranty periods on landscaping are entirely up to the contractor and what you negotiate.
What is a reasonable workmanship warranty for an interlock patio?
2 to 3 years is the Ontario standard in 2026. 1 year is too short and suggests the contractor knows the base will fail. 5 years and beyond is uncommon but a nice signal of confidence.
Does the warranty transfer if I sell my home?
Manufacturer warranties on pavers, blocks and composite are usually transferable for the full term. Workmanship warranties from the contractor are usually not transferable, though some will honour them on request. Get this in writing.
What if the contractor goes out of business?
Workmanship warranty dies with the company. Manufacturer warranties on the material stay with you. This is one reason to hire established contractors with a long track record, not first-year businesses.
Can a contractor refuse a warranty claim?
Yes, if the issue falls under exclusions or you did not maintain the install per their instructions. If you believe the refusal is unreasonable, you can file a complaint with Landscape Ontario (for members) or pursue small claims court.
Do I need to pay for a warranty inspection?
No. Warranty inspections are free during the coverage period. If a contractor charges a “callout fee” for a warranty claim, that is a red flag.
Are plant warranties prorated?
Usually not. The Landscape Ontario 1-year guarantee is full replacement, one time, no prorating. Some contractors offer extended 2-year warranties that are prorated in year 2.
What about winter damage to my new patio?
Freeze-thaw cycling and some seasonal movement is normal and not warranty. Permanent heave, cracked pavers from settling, or joint failure are warranty. Salt damage and snowplow gouges are excluded everywhere.
Ready to hire someone who puts the warranty in writing? Request a free quote from our crew and we will walk you through every warranty term before you sign. While you are at it, see how to read a landscape quote and the questions to ask before hiring to round out your buyer checklist.
Contractor refusing to honour warranty? See our guide on firing a landscaping contractor.