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Polycarbonate Roof Cost Calculator

Estimate Canadian 2026 polycarbonate patio cover, sunroom and carport roof cost (Palram Suntuf, Palruf, Sunlite, Polygal Thermoclear) by area, sheet type, tint, glazing-bar length and storey. Aligned with CSA A123.21, NBC 9.26 and provincial limited-combustible material rules.

Polycarbonate Roof Cost Calculator

Estimate Canadian 2026 polycarbonate patio cover, sunroom and carport roof cost (Palram Suntuf, Palruf, Sunlite, Polygal Thermoclear) by area, sheet type, tint, glazing-bar length, subframe and storey. Aligned with CSA A123.21, NBC 9.26 and provincial limited-combustible material rules.

Estimated polycarbonate roof cost
$6,078
Range: $5,166 – $7,293
sheet + glazing bars + perimeter trim + subframe + tear-off + permit + disposal
Sheet
$2,816
Glazing bars
$1,155
Perimeter trim
$581
Subframe
$946
Tear-off
$0
Permit
$220
Disposal
$360

What this calculator estimates

This calculator quotes the all-in installed cost for a Canadian 2026 polycarbonate roof — for patio covers, sunrooms, gazebos, carports, lean-tos and three-season rooms. It separates the bill into the line items HomeStars and Renomii installers actually invoice:

  • Sheet cost — Palram Suntuf, Palruf, Sunlite Solid, Polygal Thermoclear or Marlon ST sheet priced per sq ft, scaled by sheet type (corrugated / solid / twin-wall / multi-wall), tint, storey and access.
  • Glazing bars — aluminium snap-cap rafter bars priced per linear foot, the structural backbone that holds multi-wall and twin-wall sheets in place.
  • Perimeter trim — F-section side closures, ridge cappings, end caps and breather tape per linear foot.
  • Subframe — timber rafters (SPF 2×6 or 2×8), pressure-treated decking lumber, or aluminium framing per sq ft.
  • Tear-off — removing the existing patio roof if any.
  • Permit — provincial building permit fee for sunroom or patio cover installation.
  • Disposal — debris haul-away and dump fee.
  • Weekend / after-hours premium — 25% surcharge for evening, weekend, or expedited schedules.

A minimum mobilisation charge of C$1,580 applies in most Canadian metro markets — the labour cost of mobilising a 2-person crew, the cut-to-size logistics from Home Depot, Rona or the trade supplier, and the cap-flashing labour at the wall-to-cover transition dominate small jobs.

How to use it

  1. Measure the roof area in sq ft. For a typical Canadian patio cover, measure the outer footprint (eave-to-eave × ridge-to-eave). A 10×20 ft patio cover is 200 sq ft.
  2. Pick a sheet type — corrugated Suntuf or Palruf for the budget end ($4-6/sq ft material), twin-wall 6 mm Sunlite for thermal-performance builds, multi-wall 16 mm Sunlite or Polygal Thermoclear for premium patio covers and three-season rooms, multi-wall 25 mm for full year-round sunrooms.
  3. Pick a tint — clear for north-facing patios and cold-climate Prairies, opal/diffused for general-purpose patios, bronze/smoke for south-facing solar-gain control, solar-control IR coating (Sunlite Solar Smart) for premium overheating control.
  4. Set storey count — single-storey for ground-level patio covers, two-storey for upper-floor balcony covers, three-storey for high-rise rooftop installations.
  5. Pick access — easy is ground-level patio with ladder access, moderate is single-storey ridge with scaffold tower, hard is multi-storey or rooftop installation requiring a lift.
  6. Set glazing-bar length in linear feet. For multi-wall and twin-wall sheets, plan one aluminium snap-cap bar per sheet width seam (typical sheet is 4 ft wide).
  7. Set perimeter trim length in linear feet. Measure the outside edge of the roof plus the wall-flashing line.
  8. Toggle subframe — ON if building new framing, OFF if installing onto an existing patio frame.
  9. Toggle tear-off — ON if replacing a failed existing patio roof.
  10. Toggle add-ons — permit, disposal, weekend premium.

Typical 2026 Canadian polycarbonate roof cost ranges

These reflect 2026 nationwide pricing from Palram Canada, Polygal North America, Marlon ST installer surveys, HomeStars and Renomii 2026 quotes data and CRCA 2026 Roofing Cost Survey.

Scope (clear, single-storey, moderate access, with subframe, 60 lf bars and 60 lf trim)2026 installed price
100 sq ft pergola (Suntuf corrugated)C$1,580 – C$2,300
200 sq ft patio cover (twin-wall 10 mm Sunlite)C$3,200 – C$4,800
200 sq ft patio cover (multi-wall 16 mm Sunlite)C$4,100 – C$6,500
400 sq ft carport (multi-wall 16 mm Polygal Thermoclear)C$7,200 – C$11,000
600 sq ft three-season room (multi-wall 25 mm Sunlite Premium)C$14,000 – C$21,000
Corrugated polycarbonate Suntuf / Palruf, installedC$6 – C$11 / sq ft
Twin-wall 6 mm Sunlite, installedC$9 – C$13 / sq ft
Twin-wall 10 mm Sunlite, installedC$12 – C$17 / sq ft
Multi-wall 16 mm Sunlite / Polygal, installedC$16 – C$25 / sq ft
Multi-wall 25 mm Sunlite Premium, installedC$21 – C$31 / sq ft
Solid 6 mm polycarbonate, installedC$11 – C$17 / sq ft
Snap-cap aluminium glazing barC$17.50 / lf
F-section perimeter / end-cap / breather tapeC$8.80 / lf
Timber (SPF) or steel subframe additionC$4.30 / sq ft
Bronze / smoke tint uplift+8% sheet cost
Solar-control IR coating uplift+18% sheet cost

Add 15% for two-storey access, 35% for three-storey or higher, and 10-30% for difficult access (lift required, restricted yard).

Cost drivers

Sheet type. The dominant variable. Corrugated polycarbonate at C$6-11/sq ft installed is the budget benchmark. Twin-wall at 6 mm doubles the thermal performance and adds C$3-5/sq ft. Multi-wall at 16 mm triples thermal performance and adds C$8-14/sq ft over corrugated. Multi-wall 25 mm five-wall is the premium spec for sunrooms at C$14-20/sq ft over corrugated and is the only spec that meets NBC 9.36 / NECB above-deck insulation for conditioned-space year-round use.

Glazing-bar system. Multi-wall and twin-wall sheets must be installed with an aluminium snap-cap glazing bar that accommodates thermal expansion (polycarbonate expands 0.065 mm per metre per °C — a 4 m sheet moves 13-16 mm between -35 °C winter and +50 °C summer surface temperature in Calgary or Winnipeg, larger than any other climate). Snap-cap bars run C$15-22/lf installed.

Perimeter trim, breather tape and snow-rated end caps. Every sheet edge must be sealed against insects, snow infiltration and water. The open ends of internal flutes are sealed at the bottom with adhesive aluminium tape (allowing condensation to escape downward) and at the top with vapour-tight aluminium tape. The aluminium tape must be rated for -40 °C operating temperature — generic indoor-rated breather tape fails in Canadian winter. Plan C$7-12/lf all-in.

Subframe. A SPF 2×6 rafter subframe at 24-in centres runs C$3.30-5.00/sq ft. Pressure-treated SPF for ground-contact carports adds 15%. An aluminium subframe (popular for upgrade-on-existing-concrete-patio installations) runs C$6-9/sq ft. Steel subframes (for Quebec/BC mountain snow-load regions or large spans over 16 ft) run C$8-12/sq ft.

Tint. Clear sheet has the highest light transmission and the highest passive solar gain — beneficial in cold Canadian climates where any winter sun is valuable. Opal/diffused sheet scatters direct sun and eliminates hotspots, +6%. Bronze smoke tint blocks 25-35% solar gain at the cost of 20% light transmission, +8% — used in southern Ontario and BC. Solar-control IR coating (Sunlite Solar Smart, Polygal Solar Control) rejects 65-80% of solar heat while keeping 50-60% visible light, +18% — rarely needed in Canada except for west-facing patios in Okanagan, southern Saskatchewan and southwest Ontario.

Snow load and structural compliance. NBC 9.4 ground snow load (Ss) varies from 1.5 kPa (Calgary, Winnipeg) to 3.4 kPa (Quebec City) to 4.8 kPa (Saguenay). Sheet selection must satisfy the local Ss with appropriate rafter spacing: corrugated suntuf supports up to 1.2 kPa at 600 mm spacing (Toronto/Calgary OK), 16 mm multi-wall supports up to 2.4 kPa at 600 mm spacing (Toronto/Vancouver OK), 25 mm 5W multi-wall supports up to 3.6 kPa at 600 mm spacing (Quebec City/Halifax OK). For Saguenay and high-snow zones, reduce rafter spacing to 400 mm or commission a P.Eng. structural review.

Building height and access. Single-storey ground-level installs are baseline. Two-storey work adds 15% for tower scaffold rigging. Three-storey or higher requires scissor lift or boom lift rental (C$300-650/day) plus rigging crew.

Per-locale code and standards (Canada)

  • NBC 9.4 / NBC 4.1.6 — Ground snow load (Ss) for all Canadian locations; mandatory design load for any roof.
  • NBC 9.26 / NBC 9.27 — Roofing materials, decking and weather barrier requirements.
  • NBC 9.36 / NECB 2020 — Energy efficiency for buildings; above-deck R-value minimums for conditioned spaces.
  • OBC SB-10 (Ontario) — Supplementary standard for sustainable building, including conservatory U-value relaxation.
  • BCBC 9.36 (British Columbia) — Energy step code; multi-wall polycarbonate satisfies Step 1-2 for sunrooms.
  • CSA A123.21 — Standard test method for the dynamic wind uplift resistance of mechanically attached membrane-roofing systems (relevant for snap-cap glazing-bar wind certification).
  • CCMC Evaluation Reports — Canadian Construction Materials Centre third-party evaluations for Suntuf, Palruf, Sunlite Solid, Polygal Thermoclear (verify current report number before specifying).
  • CAN/ULC-S102 — Standard method of test for surface burning characteristics of building materials; polycarbonate is Class C.
  • CAN/ULC-S107 — Standard methods of fire tests of roof coverings; required for primary dwelling roofs.
  • CSA O80 — Wood preservation for pressure-treated SPF subframe lumber.
  • CRCA Roofing Specifications Manual — Canadian Roofing Contractors Association best practice; covers polycarbonate sunroom integration.
  • Provincial WCB / WSIB / WorkSafeBC — Workplace safety; fall protection mandatory above 3 m (10 ft) in most provinces.

Diagnostic step-by-step

  1. Check the UV-protection layer orientation — premium polycarbonate has a factory co-extruded UV-resistant layer on one face only.
  2. Confirm CCMC evaluation report on file — for permit submission, the building department requires the CCMC report number for the specific sheet manufacturer and product.
  3. Verify Ss snow load matches the sheet rating — local Ss from NBC Appendix C; sheet rating from manufacturer’s CCMC report.
  4. Inspect glazing bars for movement gaps — polycarbonate must be free to expand and contract across a wide thermal range in Canada.
  5. Inspect breather-tape installation — vapour-tight at the top, porous foil at the bottom; rated for -40 °C operating temperature.
  6. Check rafter spacing against the sheet and Ss specification — 600 mm for 16 mm multi-wall in normal-snow regions; 400 mm in high-snow regions (Quebec, Atlantic Canada, BC mountains).
  7. Check the minimum roof pitch — polycarbonate requires 5° (1:12) minimum to self-drain.
  8. Verify drainage at the lower edge — sheet flutes must drain freely into a clear gutter and downpipe sized to NBC 9.26.18.

Avoiding scams and overcharging

Canadian patio cover and sunroom installs are a frequent target for low-spec contracting:

  • Quotes that omit the CCMC evaluation report number — sheet may be uncertified import.
  • Quotes that use generic galvanised screws instead of EPDM-washer fasteners rated for the sheet — leak within 2 years.
  • Quotes that skip the wall-flashing line at the house-to-cover transition.
  • Quotes that exceed the manufacturer’s rafter spacing for the local Ss — sheet sags, ponds water, fails warranty in first heavy snowfall.
  • Quotes that use indoor-rated breather tape — fails in Canadian winter.
  • Quotes that omit drip-edge metal at the eave — water blows back under the sheet.
  • Quotes that skip the P.Eng. structural review for Ss ≥ 2.5 kPa.

Insist on an itemised quote with the sheet manufacturer and product number, the UV-layer warranty term, glazing bar manufacturer, breather tape part number rated for -40 °C, fastener manufacturer with EPDM washer, and a written 10-year leak warranty. Verify the contractor’s provincial trade licence (ROCC in Ontario, RBCG in BC, RBQ in Quebec, BC in Manitoba, OCOT in Ontario). Check HomeStars / Renomii reviews. For attached sunrooms, confirm the permit is in hand and the P.Eng. stamp is on file before work begins.

Sources: Palram Canada 2026 Installer Price List; Polygal North America Thermoclear Specifier Guide; Marlon ST Technical Manual; Sunlite installation manual; HomeStars and Renomii 2026 quotes data; CRCA 2026 Roofing Cost Survey; NBC 9.4, 9.26, 9.27, 9.36, 4.1.6; OBC SB-10, BCBC 9.36; CCMC Evaluation Reports database; CSA A123.21, O80; CAN/ULC-S102, S107; provincial WCB / WSIB / WorkSafeBC fall-protection regulations.

Frequently asked questions

How much does a polycarbonate patio roof cost per sq ft in Canada in 2026?
Most Canadian polycarbonate patios, gazebos and carports installed in 2026 price between C$8.50 and C$22 per sq ft all-in for the sheet, snap-cap aluminium glazing bars, perimeter trim, breather tape and a timber or steel subframe. Corrugated polycarbonate (Palram Suntuf, Palruf 0.8 mm) is the budget option at C$6-11/sq ft installed. Twin-wall 6 mm Sunlite runs C$9-13/sq ft, twin-wall 10 mm C$12-17, multi-wall 16 mm Polygal Thermoclear C$16-25 and heavy-duty 25 mm five-wall C$21-31. A typical 200 sq ft patio cover in 16 mm multi-wall clear with an aluminium subframe ranges C$4,100-C$6,500 installed in 2026. Source: Q1 2026 contractor quotes via HomeStars, Renomii, TrustedPros across Toronto, Vancouver, Montreal, Calgary, Edmonton, Ottawa and Winnipeg; CRCA 2026 Roofing Cost Survey; Palram and Polygal Canada 2026 installer price lists; CASMA polycarbonate installer reports.
Will polycarbonate handle Canadian snow load?
Yes, when correctly designed. NBC 9.4 and NBC 4.1.6 set ground snow load (Ss) by location — Toronto Ss = 2.0 kPa, Montreal Ss = 2.5 kPa, Quebec City Ss = 3.4 kPa, Winnipeg Ss = 1.5 kPa, Calgary Ss = 1.5 kPa, Vancouver Ss = 2.5 kPa, Halifax Ss = 2.8 kPa, Ottawa Ss = 2.5 kPa. Multi-wall polycarbonate is rated to 2.4 kPa (16 mm 3X structure) or 3.6 kPa (25 mm 5W structure) with rafter spacing at 600 mm and a deflection limit of L/200. Corrugated Suntuf and Palruf are rated to 1.0-1.2 kPa with rafter spacing at 600 mm — adequate for Toronto and Calgary but inadequate for Quebec, Halifax and Vancouver where 25 mm multi-wall with reduced rafter spacing is required. NBC Part 9 Subsection 9.26.2 requires a structural engineer's certificate for any non-traditional roofing material in regions with Ss ≥ 2.5 kPa — get this before installation. Heavy snow accumulation requires a positive slope of 1:6 minimum to shed; flatter pitches need supplementary mechanical snow clearance.
Does a polycarbonate sunroom roof need a building permit in Canada?
Yes — all sunroom and three-season-room construction in Canada requires a provincial building permit under NBC 9.7 and provincial amendments (OBC in Ontario, BCBC in BC, NBC adopted directly in most provinces). Free-standing pergolas under 10 m² (108 sq ft) and under 2.4 m height are typically permit-exempt as 'minor accessory structures' in most municipalities. Attached patio covers (bolted to the house) are NOT exempt — they require a permit, structural drawings stamped by a P.Eng., and inspection at framing and final. Polycarbonate sheet itself must hold CSA A123.21 certification or CCMC evaluation report — Palram Suntuf, Sunlite Solid, Palruf and Polygal Thermoclear all hold current CCMC evaluation reports. Ontario, Quebec and BC additionally require Section 3.1.4 / 3.1.13 / 9.10 fire-resistance compliance — polycarbonate is rated to CAN/ULC-S102 'Class C' for surface burning characteristics, acceptable for accessory structures but not for primary dwellings adjacent to a property line.
What's the difference between Suntuf and Sunlite polycarbonate?
Both are Palram products but very different formats. Suntuf is a corrugated wave-profile sheet (0.8 mm or 1.0 mm thick) in solid colour with a single-layer construction. It is the budget option for pergolas, sheds, chicken coops, dog runs and budget patio covers. The wave profile self-drains and the sheet self-supports across 600 mm rafter spacing. Suntuf carries a 10-year UV warranty. Sunlite is a multi-wall structured sheet (6 mm, 8 mm, 10 mm, 16 mm or 25 mm) with internal ribs forming air chambers for thermal performance. Sunlite is the premium option for conservatories, sunrooms, pool covers, greenhouse-style attached additions and anywhere insulation matters. R-value: Suntuf 0.6, Sunlite 6 mm 1.4, Sunlite 10 mm 1.7, Sunlite 16 mm 2.1, Sunlite 25 mm 3.0. Sunlite is installed with an aluminium snap-cap glazing bar system; Suntuf is installed with self-drilling screws and EPDM washers. Sunlite carries a 10-year UV warranty plus a 5-year hail warranty up to 25 mm hailstone.
How long does a polycarbonate roof last in Canada?
Service life is at the longer end of the global average because Canadian UV intensity is below the southern US and well below tropical regions. Premium multi-wall sheet with co-extruded UV layer (Sunlite Solid, Polygal Thermoclear, Palruf UV) carries a 10-year manufacturer warranty against yellowing and impact loss. Real-world service life is 18-25 years across most of Canada and 15-20 years in the Prairies where UV plus extreme thermal cycling stress the sheet. Common Canadian failure modes are: (1) impact damage from hail (Calgary, Edmonton, Winnipeg) — Sunlite carries a 5-year hail warranty up to 25 mm hailstone, useful in Prairie hail alley; (2) snow-load failure in Quebec, Atlantic Canada and the BC mountains where Ss exceeds 2.5 kPa and the sheet was under-spec'd; (3) thermal-cycling fastener loosening between -30 °C winter and +50 °C surface temperature in summer — re-torque fasteners every 5 years; (4) condensation pooling in multi-wall flutes from missing or wrong-side breather tape.
Can polycarbonate go on a flat roof?
Polycarbonate self-supports from 5° (1:12) minimum pitch — below that, water pools at the lower screw line and seeps into the flutes by capillary action. For a 'flat' Canadian roof (typically 1:50 in Toronto, Vancouver, Montreal), polycarbonate is not the right material — the IRC-equivalent minimum slope under NBC 9.26.5 is 1:50 for membrane systems but 1:12 for plastic sheet glazing. Use polycarbonate only on pitches of 1:12 (5°) or steeper. For flat roofs, mod-bit or TPO membrane is the appropriate choice. For a 'low-slope' sunroom (1:8 to 1:6, i.e. 7°-10°), polycarbonate works well; the 7-10° range is the recommended sweet spot — self-cleaning, self-draining, and shallow enough to feel like an open conservatory.

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