AntoineAsphalt.caBest for
- Outdoor dining that needs predictable shade
- Homes needing a true rain-protected room
- Privacy screens with integrated lighting
- Owners planning fans or outdoor-kitchen wiring early
Decks · Covered · Hamilton
Covered Deck & Pergola Builders in Hamilton
A covered deck creates reliable shelter; an open-slat pergola creates filtered shade without full rain protection. Roof loads, footings, beams and connections must be designed for Ontario snow, and material pricing follows the typical Ontario installed ranges (2026).
How a deck is built, from footings to railing
Shown: Covered deck — Step 1 of 5 — Footings
- Footings or helical piles reach below the frost line so the deck can't heave in winter.
- Posts carry the load up from the footings.
- Beams and joists frame the structure under the boards.
- Decking boards and a picture-frame border finish the walking surface.
- A black metal safety railing (guard) goes up last, where required.
Est. 2020Footings below frostPermit drawings handledDeck + landscape design
Quick answer
A covered deck creates reliable shelter; an open-slat pergola creates filtered shade without full rain protection. Roof loads, footings, beams and connections must be designed for Ontario snow, and material pricing follows the typical Ontario installed ranges (2026). Your exact price comes from an on-site quote.
Fit before finish
Is this deck right for you?
May not suit
- Adding a roof before the existing frame is assessed
- Lots where a large cover would darken important windows
- Treating an open pergola as weatherproof shelter
Profiles & details
Styles and options
Solid roof
The strongest rain protection, with snow loads carried through purpose-designed supports.
Open pergola
Slatted overhead structure filters sun while keeping the room visually open.
Louvered-style shade
Adjustable-style systems are options to discuss; structure and drainage still need project review.
Screened edge
Privacy screens, lighting and fan wiring are cleanest when included before framing closes.
Balanced guidance
Honest pros & considerations
Advantages
- Extends use through sun and light rain
- Creates a defined outdoor room
- Hides planned wiring neatly
- Can combine shelter with privacy
Considerations
- A roof adds snow load to footings, beams and connections
- Existing decks need structural assessment before a roof is added
- Solid covers can reduce daylight indoors
- Permit likelihood and cost level are higher for a roof than an open pergola
Typical Ontario installed range (2026)Material table below; roof structure quoted on site
Approximate lifespanVaries by selected surface and cover
MaintenanceInspect roof, drainage and finish
Feel & heatSheltered outdoor room
Material decision
Compare the closest alternatives
Composite
Lifespan 25–30+ yrs
Maintenance Occasional washing
Cost band $$$ · $65–$95/sq ft
Look: Uniform boards, wood-look colours
Heat & comfort: Darker colours get warmer in full sun
Cedar
Lifespan 15–25 yrs
Maintenance Regular staining/sealing
Cost band $$$ · $55–$80/sq ft
Look: Warm natural grain
Heat & comfort: Natural wood feel; softer surface can mark
Lifespans are approximate, with proper installation and maintenance. Prices are typical Ontario installed ranges (2026); your exact price comes from an on-site quote.
| Material | Look | Lifespan (approx.) | Maintenance | Typical range |
|---|---|---|---|---|
| Pressure-Treated Wood | Classic wood, stains to suit | 15–20 yrs | Regular staining/sealing | $45–$65 / sq ft |
| Cedar | Warm natural grain | 15–25 yrs | Regular staining/sealing | $55–$80 / sq ft |
| Composite | Uniform boards, wood-look colours | 25–30+ yrs | Low — occasional washing | $65–$95 / sq ft |
| PVC | Crisp, premium finish | 30+ yrs | Low — occasional washing | $80–$110 / sq ft |
Planning range
Estimate your deck
Estimated range for ~192 sq ft$17,180 – $27,240
- Deck surface: $12,480–$18,240
- Stairs: $1,500–$3,000
- Railing: $3,200–$6,000
Raised decks need guards above 600 mm, taller posts and bracing, which push the per-sq-ft rate up. Confirmed on site.
Per-sq-ft rates usually drop as decks get larger; height, stairs, railings and complex shapes push them up.
Typical Ontario installed ranges (2026), not a quote. Your exact price comes from a free on-site visit.
Shelter decision
Pergola or solid roof?
| Option | Shade | Rain protection | Snow load | Permit likelihood | Cost level |
|---|---|---|---|---|---|
| Pergola | Filtered | Limited | Open structure still engineered | Confirm locally | Lower than a full roof |
| Solid roof | Full | Full when detailed correctly | Full roof load | Higher | Higher |
Below the surface
How we build covered decks & pergolas decks
The overhead structure starts at the footing, not at the rafters. We plan roof or pergola loads, water, sightlines, wiring and the deck frame together.
- 01
Compare roof, pergola and shade goals
- 02
Confirm permit, setbacks and daylight impacts
- 03
Assess existing framing or design new below-frost supports
- 04
Size posts, beams and roof connections for applicable loads
- 05
Frame decking, privacy screens and electrical pathways
- 06
Complete roofing, drainage, finishes and inspection
What's inside a deck, from the ground up
Everything below the boards — footings, posts, beams and joists — is what keeps a deck safe and level for decades; click a layer to see why it matters.
- Native soil: Undisturbed native soil carries the load. Topsoil and fill are not used as bearing.
- Frost line (~1.2 m): Footings must bear below frost depth — about 1.2 m / 4 ft in this region — so freeze–thaw can't heave the deck.
- Pier or helical pile: Concrete piers are poured below frost; helical piles are screwed down to bearing depth with little excavation and can be loaded right away.
- Post + bracket: Posts sit in a bracket on the footing so they stay dry and positively connected.
- Beam: Beams gather joist loads and carry them to the posts.
- Joists + joist tape: Pressure-treated joists; on composite and PVC builds we add joist/beam protection tape to shed water from the tops.
- Ledger + flashing / freestanding: An attached deck needs a properly fastened and flashed ledger. A freestanding design uses its own beam instead of the house.
- Decking, fasteners, gapping: Hidden fasteners and correct gapping on composite/PVC let boards drain and move with temperature.
- Guard: 900 / 1,070 mm + 100 mm sphere: Guards are required above 600 mm. Minimum 900 mm high up to 1.8 m above grade, 1070 mm above that; openings must stop a 100 mm sphere.
- Stair stringers: Stairs must meet Ontario Building Code rise/run and handrail rules; we frame them to code with solid landings.
2. Frost line (~1.2 m)
Footings must bear below frost depth — about 1.2 m / 4 ft in this region — so freeze–thaw can't heave the deck.
Ownership timeline
Care & maintenance
Clear drainage
Keep roof edges and water paths free of leaves and debris.
Observe the structure
Do not alter or overload the cover; report unusual movement or damage.
Review finishes
Inspect timber, fasteners, fans, lights and screened edges.
Hamilton · Burlington · Oakville
Permits and guard requirements
Hamilton
Any attached deck needs a permit. New or replacement guards also require a permit. Building Division: 905-546-2720.
Burlington
Attached decks and decks more than 600 mm above grade or over 10 m² commonly need a permit. Confirm with City of Burlington Building.
Oakville
Any attached deck needs a permit; detached decks over 10 m² and higher than 61 cm above grade also need one.
Confirm current requirements with your municipality before building.
Review the complete deck permit guide →Planning guides
Deck guides for homeowners
Type-specific answers
Covered Decks & Pergolas FAQ
Do I need a permit for a covered deck in Hamilton?
A detached covered deck or porch over 10 m² needs a permit regardless of height, and any attached deck needs one. Confirm current requirements with the municipality.
What is the difference between a pergola and a roof?
A pergola has open slats for filtered shade. A solid roof provides rain protection and carries greater snow and water loads.
Can a roof be added to my existing deck?
Only after its footings, frame, ledger and connections are checked for the added loads. Reinforcement or rebuilding may be necessary.
Will a covered deck darken my house?
It can. Cover depth, ceiling finish, orientation and nearby windows should be studied before the footprint is fixed.
How is Ontario snow load handled?
The cover, beams, posts, connections and footings must be designed as a complete load path for the applicable conditions.
What deck material works under a cover?
Pressure-treated, cedar, composite and PVC can all work. Exposure, maintenance preference and budget guide the choice.
Local deck building
Hamilton, Ancaster, Burlington & Oakville
Hamilton
Hamilton MountainAncasterDundasStoney CreekWaterdownBinbrookFlamboroughWestdaleKirkendallGlanbrook
Burlington
AldershotBrant HillsTyandagaMillcroftApplebyLaSalle
Oakville
BronteGlen AbbeyRiver OaksPalermoOld OakvilleKerr Village
Start on site
Plan your covered decks & pergolas deck.
Share the approximate size, height, stairs, railings and city. We’ll arrange a free on-site design consult and exact quote.