What Questions Should I Ask Before
Hiring an Outdoor Living Contractor?

Hiring the wrong contractor for this work does not merely result in a patio that looks a bit off or a walkway that has a few uneven pavers. It results in structural collapse of retaining walls that were never engineered. It results in basement flooding because the grading pitched water toward your foundation instead of away from it. It results in voided homeowner’s insurance because unpermitted structures were built without engineered drawings. And it results in massive personal liability—because if an uninsured worker falls off your property and breaks a vertebra, the lawsuit lands on your doorstep, not the contractor’s.

The landscape and hardscaping industry in Ontario is, unfortunately, unregulated. There is no provincial licensing body. There is no mandatory certification. Anyone with a pickup truck and a shovel can print business cards calling themselves an “outdoor living contractor.” Some of them are genuinely talented craftspeople with decades of experience and proper insurance. Many of them are not. And from the outside—from the website, the Instagram photos, the smooth sales pitch—it is nearly impossible to tell the difference.

This guide gives you the questions that do tell the difference. These are not polite, easy questions. They are the kind of technical, documentation-heavy questions that a legitimate, heavily engineered firm will answer confidently and immediately, and that a fly-by-night operator will stumble over, deflect, or refuse to address. Ask every one of them. The answers will tell you everything you need to know.

Question 1: “How Deep Do You Excavate, and What Base Material Do You Use?”

This is the single most important technical question you can ask a hardscaping contractor, and the answer will instantly reveal whether you are speaking to an engineer or an improviser.

A professional hardscape contractor will answer this question with specific depths, specific materials, and specific compaction standards. The answer should sound something like this:

“We excavate a minimum of 300mm below finished grade for pedestrian patios, 375mm for driveways, and deeper for heavy-traffic or commercial applications. We place the excavated surface on a non-woven geotextile fabric to prevent subsoil migration, then install Granular A base material in controlled lifts of no more than 100mm, compacting each lift with a minimum 5,000 lb vibratory plate compactor to 95% Standard Proctor density. The bedding layer is 25mm of HPB (High-Performance Bedding) or manufactured screening sand, screeded to laser-graded elevations.”

That is what a professional sounds like. Now, here is what a problem contractor sounds like:

“We dig a few inches, throw some screenings down, and lay the pavers.”

“We use limestone screenings for the base. It packs down nice and hard.”

“Don’t worry about the base, the pavers are what matters.”

If you hear any variation of these responses, end the conversation. Limestone screenings as a base material is a red flag that identifies an unqualified contractor more accurately than any other single indicator. Screenings are crushed limestone fines—a powder-like material that compacts into a hard surface initially but has zero structural drainage capacity. When water penetrates through the paver joints (and it always does), limestone screenings turn into a dense, water-trapping paste that holds moisture directly against the bottom of the pavers. In Ontario’s freeze-thaw climate, this trapped water freezes, expands, and heaves the pavers upward—creating the uneven, buckled paver surfaces that are the calling card of cheap installation.

In Newmarket, where the soil conditions north of Davis Drive often include heavy glacial till clay with very low natural drainage capacity, the sub-base specification is even more critical than in areas with sandier soils. The native clay does not drain. If the granular base is too shallow or uses non-draining materials like screenings, all of the water that enters the paver system sits on top of the clay and freezes in place. The result is dramatic frost heave—pavers that rise 30-50mm above the surrounding surface, creating trip hazards and destroying the aesthetic integrity of the installation within two or three winters.

A legitimate contractor working in Newmarket and the surrounding York Region will know these soil conditions intimately and will spec the sub-base accordingly—typically 300-400mm of Granular A (a graded crushed stone with controlled fines content that both drains and compacts) on geotextile separation fabric, with the depth increasing in areas of particularly poor native soil.

“The base is the building. The pavers are the paint. If someone tells you the pavers are what matters, they do not understand what they are building.”

Question 2: “Can You Provide Current WSIB Clearance, Commercial Liability Insurance, and Engineered Drawings?”

This is the question that separates a legitimate business from a cash operation with a website. And unlike the sub-base question, which tests technical knowledge, this question tests legal compliance and financial responsibility—the kind of structural protections that exist specifically to protect you, the homeowner.

WSIB (Workplace Safety and Insurance Board) Clearance

In Ontario, any business in the construction sector with one or more employees is legally required to register with the WSIB and maintain active coverage. WSIB coverage provides workplace injury insurance for the contractor’s employees. Without it, if a worker is injured on your property while performing work you hired them to do, you, the homeowner, can be held personally liable for the worker’s medical costs, lost wages, and disability payments.

This is not a theoretical risk. It happens. A worker falls off a retaining wall form, breaks an ankle, and cannot work for six months. The contractor has no WSIB coverage. The worker sues the homeowner. The homeowner’s home insurance policy may or may not cover the claim (many policies exclude construction-related injuries). The homeowner is now personally on the hook for potentially hundreds of thousands of dollars in damages.

Ask the contractor for a current WSIB Clearance Certificate. This is a one-page document issued directly by the WSIB confirming that the contractor is registered, in good standing, and has no outstanding premiums or penalties. A legitimate contractor will produce this document within minutes—it is available for instant download from the WSIB website. If a contractor hesitates, claims to be “exempt,” or says they “don’t need it,” they are either non-compliant or operating as an unregistered cash business. Either way, you are exposed.

Commercial General Liability (CGL) Insurance

A CGL policy protects the homeowner if the contractor’s work causes property damage. Excavation ruptures a gas line. A retaining wall collapses onto a neighbour’s property. A concrete truck backs into your garage. Without CGL coverage, you are pursuing the contractor personally for damages—and if they are a small cash operation, there is nothing to pursue.

Ask for a Certificate of Insurance naming you as additionally insured for the duration of the project. The certificate should show a minimum of $2,000,000 in general liability coverage (many legitimate firms carry $5,000,000). The certificate must be current—not expired, not a photocopy of last year’s certificate. Call the insurance company on the certificate to verify it is active. A five-minute phone call can save you from a catastrophic financial exposure.

Engineered Drawings (Where Required)

In Newmarket, as in all of York Region, any retaining wall exceeding 1.0 metre in exposed height requires a building permit, and the permit application must include engineered structural drawings stamped by a licensed Professional Engineer (P.Eng.). This is not optional. It is the Ontario Building Code. The same requirement applies to roofed structures (pergolas, pavilions, covered outdoor kitchens) that exceed specific size thresholds.

A contractor who says “we don’t need a permit for that” when the structure clearly triggers the OBC thresholds is either ignorant of the code or intentionally circumventing it. Both are disqualifying. An unpermitted structure built on your Newmarket property creates several serious problems:

• Resale liability: When you sell your home, the buyer’s lawyer will request permit records. An unpermitted retaining wall, outdoor kitchen, or pavilion will either reduce your sale price, delay closing, or require you to obtain retroactive permits (which may require partial demolition and reconstruction to current code standards)
• Insurance voidance: If an unpermitted structure fails and causes injury or property damage, your homeowner’s insurance may deny the claim on the basis that the structure was not built to code
• Municipal enforcement: The Town of Newmarket’s building department can issue orders to comply at any time—requiring you to either obtain retroactive permits (with engineering costs) or demolish the non-compliant structure at your expense

A legitimate contractor will tell you upfront which elements of your project require permits, will manage the permit application process on your behalf, and will provide the P.Eng. stamped drawings as part of the project scope. This is not an additional service or an upsell. It is a basic legal requirement that any professional contractor handles as standard practice.

Question 3: “How Will This Project Manage Stormwater Runoff?”

This is the question that most homeowners never think to ask—and it is the question whose answer has the most direct impact on the long-term performance and safety of your property.

Every square metre of hardscape surface (pavers, concrete, natural stone) that replaces permeable lawn or garden bed changes the drainage dynamics of your property. Before the project, rainwater fell on your lawn and percolated into the soil. After the project, that same rainwater hits an impermeable surface and must go somewhere. If the contractor has not designed a drainage plan, that “somewhere” is typically your basement.

A professional contractor’s answer to the drainage question should include all of the following elements:

Laser Grading

Every hardscape surface must be graded with a minimum 1-2% slope directing water away from the house foundation and toward designed collection points (catch basins, channel drains, or permeable zones). This slope must be established at the sub-base level, not improvised at the bedding layer. A 1% slope means the surface drops 10mm for every 1,000mm of horizontal run. On a 6-metre deep patio, that is a 60mm total fall—enough to move water reliably, but imperceptible to the eye.

The grading is established using a laser level or GPS grade control—not by eyeballing. “We grade by eye” is another disqualifying response. Human visual estimation of a 1% slope across a 6-metre surface is wildly inaccurate. Professional contractors laser-grade the sub-base, verify the grade with a surveyor’s level or laser, and document the elevations before the bedding layer is placed.

Catch Basins and Collection Points

On any patio or walkway project larger than approximately 30m², the volume of stormwater collected by the new impervious surface requires engineered collection points to manage. Round or square catch basins are set at the low points of the graded surface, connected to 100mm or 150mm solid ABS or PVC drainage pipe, and routed to an approved discharge point—either a municipally approved storm sewer connection, a drywell (infiltration chamber), or a daylight outlet at the rear or side of the property.

In Newmarket, the Lake Simcoe Region Conservation Authority (LSRCA) has jurisdiction over stormwater management on properties within the Lake Simcoe watershed. For larger hardscape projects that significantly increase impervious surface coverage, the LSRCA may require a stormwater management plan demonstrating that post-development runoff does not exceed pre-development levels. A contractor who is not aware of the LSRCA’s role in Newmarket is not familiar enough with local regulatory conditions to be working in the area.

Foundation Protection

The Ontario Building Code (Section 9.14) requires that finished grading direct surface water away from building foundations with a minimum fall of 150mm over the first 1.8 metres from the foundation wall. Any hardscape surface installed adjacent to the house must maintain this grade requirement. A contractor who installs a patio at a grade that reduces this fall—or worse, reverses it—has created a direct pathway for surface water to enter your foundation wall, potentially causing chronic basement moisture, efflorescence on interior block walls, and in severe cases, structural foundation damage from hydrostatic pressure.

Ask the contractor: “What will the finished grade elevation be at the house wall, and what will the grade elevation be at the far edge of the patio?” They should answer with specific millimetre measurements and confirm that the patio surface falls away from the house at the code-required minimum slope. If they cannot answer this question with numbers, their drainage plan does not exist.

“We have never walked onto a failed hardscaping project that had good drainage. Every single failure traces back to water. Every one.”

Question 4: “Can I See Your Contract, and What Does It Include?”

A professional outdoor living contractor provides a detailed written contract that specifies the scope of work at a level of detail that eliminates ambiguity. A contract that says “install patio and retaining wall” is not a contract. It is a napkin sketch with a signature line.

A legitimate contract should specify, at minimum:

• Excavation depth (in millimetres, not vague terms)
• Base material type (Granular A, Granular B, clear stone) and thickness per lift
• Compaction standard (95% Standard Proctor or equivalent)
• Paver/concrete specification: manufacturer, product name, colour code, thickness, and pattern
• Drainage plan: catch basin locations, pipe sizes, discharge points, and grading slopes
• Retaining wall specification: block type, footing depth, reinforcement (geogrid layers, rebar for concrete), drainage stone behind the wall, and engineered drawings reference
• Payment schedule: milestone-based payments tied to specific completion stages, not arbitrary percentage deposits
• Warranty terms: coverage period, what is covered, what is excluded, and the process for warranty claims
• Timeline: estimated start date, estimated completion date, and provisions for weather delays
• Permit responsibility: who applies for, pays for, and manages required building permits

If a contractor presents a one-page quote with a lump-sum price and no specification detail, you have no contractual recourse when they use 100mm of screenings instead of 300mm of Granular A. They technically “installed a patio.” The contract did not specify how. The detail in the contract is your protection.

Question 5: “Can I Visit a Project You Completed Three or More Years Ago?”

Any hardscaping project looks good on the day it is finished. The pavers are clean. The joints are full. The edges are sharp. The photos go on Instagram, and the portfolio looks impressive. But a patio at day one tells you nothing about the quality of the sub-base, the drainage, or the structural engineering beneath it.

A patio at year three tells you everything.

By year three in a Newmarket winter cycle, a properly built hardscape will have endured approximately 250-350 freeze-thaw cycles, three full seasons of de-icing salt exposure, and three springs of ground settlement and frost heave recovery. If the base was right, the drainage was right, and the materials were right, the surface will look essentially unchanged. The pavers will be level. The joints will be intact. The retaining walls will be plumb. The grading will still direct water away from the house.

If the base was too shallow, the drainage was inadequate, or the materials were wrong, year three is when it shows. Heaved pavers. Cracked concrete. Leaning retaining walls. Settled sections with standing water. Eroded joints with weeds growing through. These are the signatures of cheap installation, and they are unmistakable by year three.

A contractor who is proud of their work will happily give you the address of a project they completed three or more years ago. A contractor who deflects this request—“all our old clients have moved,” “we only started three years ago,” “we can show you photos”—is telling you either that their old work does not hold up or that they have not been in business long enough to demonstrate longevity. Both are disqualifying for a $50,000+ investment.

The Cinintiriks Approach: Full Transparency, Zero Surprises

At Cinintiriks, we do not merely tolerate these questions. We welcome them. Every question in this guide is a question we answer proactively during our initial consultation with every Newmarket client, before they even think to ask. Transparency is not a marketing position for us. It is an engineering discipline.

Don’t gamble your home’s value on an unverified contractor. Contact Cinintiriks for a fully transparent, heavily engineered outdoor living consultation in Newmarket.

FAQ: Hiring an Outdoor Living Contractor

The Final Word

An outdoor living project is not a purchase. It is a construction project that involves structural engineering, heavy machinery, buried utilities, and regulatory compliance. The contractor you hire is not a vendor selling you a product. They are a construction professional who will fundamentally alter the structure, grading, and drainage of your property for the next 20 to 30 years.

The five questions in this guide—about the sub-base, the insurance, the drainage, the contract, and the aged portfolio—are not trick questions. They are the baseline due diligence that every homeowner should perform before committing tens or hundreds of thousands of dollars to any contractor. A legitimate firm will answer all five confidently, immediately, and with documentation. A firm that cannot answer them is telling you everything you need to know.

Ask the hard questions. Demand the documents. Inspect the old work. The contractor who welcomes this scrutiny is the contractor who deserves your project.

That is The Cinintiriks Standard. Not trusted blindly. Verified completely.