Interlock & Paving in Cambridge, Ontario
D&D Exterior Finishing provides professional interlock services in Cambridge, Ontario and throughout Waterloo Region. Our team is licensed, insured, and trained to Ontario standards — ensuring every project is completed safely, on budget, and on time.
Serving Cambridge's Heritage Galt Homes, Preston Bungalows, And Newer Subdivisions
Cambridge is a city of three communities — Galt, Preston, and Hespeler — each with its own distinct housing character. Galt's older heritage homes, Preston's post-war bungalows, and newer Cambridge subdivisions all require regular exterior care. Ontario's climate puts heavy demands on exterior materials, particularly through winter ice formation and spring thaw. D&D Exterior Finishing understands Cambridge's varied housing stock and tailors every project accordingly.
Why Cambridge Homeowners Choose D&D Exterior Finishing
Superior Frost Performance
Properly base-prepared interlock flexes through freeze-thaw cycles without cracking — unlike concrete and asphalt.
Individual Unit Replaceability
Damaged or stained stones can be replaced individually — no saw-cutting or patching required, just lift and replace.
Design Flexibility
Hundreds of stone colours, shapes, and patterns allow truly custom installations that complement any home's exterior.
Long-Term Value
Quality interlock installation adds significant curb appeal and resale value — and properly maintained interlock lasts 30+ years.
What's Included in Our Cambridge Interlock & Paving Service
We excavate to the required depth (typically 8–12 inches), install and compact granular base layers to eliminate settling.
A precision-screeded sand bedding layer provides the final level surface for stone installation.
Interlock units are laid in your chosen pattern, cut to fit borders and edges, and compacted into the sand bed.
Aluminum edge restraints are spiked in place, and polymeric sand is swept and compacted into all joints to stabilize the surface.
About Our Interlock & Paving Service in Cambridge
Interlocking stone is the premium exterior hardscaping choice for Ontario homeowners — offering the durability of concrete with the added benefit of individual unit replaceability. D&D Exterior Finishing designs and installs interlock driveways, patios, walkways, and steps using premium manufactured stone from leading Ontario suppliers. Proper base preparation is our hallmark — the difference between interlock that lasts 30 years and interlock that settles after the first winter.
Ontario Building Code & Climate Context: The most common failure mode for interlock in Ontario is inadequate base preparation. An insufficient base depth, poorly compacted material, or improperly graded drainage leads to settling, rutting, and frost heaving within just a few winters. Ontario landscape contractors typically specify a minimum of 8 inches of compacted granular A base for pedestrian areas and 12 inches for driveways. D&D Exterior Finishing never shortcuts the base — it's the most important part of any interlock installation.
Licensed, insured, and local to Cambridge and Waterloo Region. No obligation — just a free, detailed quote.
Neighbourhoods We Serve in Cambridge
D&D Exterior Finishing provides interlock services throughout Cambridge and the surrounding area, including:
We also serve the broader Waterloo Region and surrounding communities: Kitchener, Waterloo, Cambridge, Guelph, Elmira, New Hamburg, Ayr, Breslau, Woodstock, Brantford, Ariss, Maryhill, New Dundee, St. Jacobs, Glenchristle. If your community isn't listed, contact us — we likely serve your area.
Frequently Asked Questions — Interlock & Paving in Cambridge
How thick does the base need to be for interlock in Ontario?
Pedestrian walkways and patios require a minimum 8-inch compacted granular base. Driveways should have 10–12 inches. D&D Exterior Finishing always installs to the proper base depth for the application.
How long does interlock last?
Properly installed and maintained interlock stone driveways and patios routinely last 30+ years in Ontario's climate. The individual stones are extremely durable — it's almost always the base that determines longevity.
Can interlock be installed over existing concrete?
Installing interlock over concrete is not recommended as it creates drainage and frost-heave issues. Old concrete is typically broken up and removed before proper interlock installation.
What is polymeric sand and why is it used?
Polymeric sand contains polymer additives that, when wetted and dried, bind the sand grains together in the joints. This stabilizes the surface, discourages weed growth, and resists ant excavation.
Do I need a permit for an interlock driveway?
Many municipalities require permits for new driveways or significant hardscaping changes. We review local requirements during your free estimate and handle any required permits.