Reviewed by The Roofing Brief Team. Last reviewed: October 2026.
PVC vs polycarbonate roof panels is the main choice in plastic roofing sheets, and one maker’s data sheets settle most of it: Palram rates its Suntuf polycarbonate panels from minus 40°F to 212°F with a lifetime limited warranty, and its Palruf PVC panels from minus 4°F to 120°F with a 5-year limited warranty. Both clear grades start at 90% light transmission, per Palram’s Palruf product sheet (Form 202), so the gap is heat, hail, load and lifespan, not day-one clarity. On October 20, 2026 a clear 26 in x 8 ft Palruf PVC panel listed at $16.98 at Home Depot and a clear 26 in x 8 ft Suntuf polycarbonate panel at $32.99 at Anawalt Lumber, about $0.98 and $1.90 per square foot of sheet. Corrugated fiberglass (GRP) and PET are the secondary options for patios, carports, greenhouses, sheds and pergolas.
PVC vs polycarbonate roof panels: maker specs side by side
The fairest comparison uses one manufacturer for both plastics, because test methods and warranty terms then match. Palram Americas makes Palruf (corrugated PVC) and Suntuf (corrugated polycarbonate) and publishes both in ICC-ES evaluation report ESR-1893 (reissued March 2026). Every value below comes from those documents or the dated shelf price shown.
| Spec | Palruf (PVC) | Suntuf (polycarbonate) | Source |
|---|---|---|---|
| Service temperature | Minus 4°F to 120°F | Minus 40°F to 212°F | Palram Palruf sheet, Form 202 comparison chart |
| Limited warranty | 5 years (weatherability and structural reliability) | Lifetime against losing more than 10% light transmission; 10 years against impact, including hail | Palruf sheet; Suntuf installation guide |
| Clear-grade light transmission | 90% | 90% | Palruf sheet; Suntuf guide, page 8 |
| Purlin spacing at 20 psf load | 24 in | 36 in | Palruf load table; Suntuf load support data |
| Purlin spacing at 30 psf load | 16 in | 30 in | Same |
| Purlin spacing at 40 / 50 psf | Not listed | 24 in / 16 in | Suntuf load support data |
| Minimum arch radius | 13 ft | 20 ft | Palruf sheet; Suntuf guide, page 7 |
| IBC plastic class (Section 2606.4), 0.8 mm sheet | CC1 | CC2 | ESR-1893, Table 1 |
| Weight at 0.8 mm | 1.12 kg/m² (about 0.23 lb/sq ft) | 1.2 kg/m² (about 0.25 lb/sq ft) | ESR-1893, Table 1 |
| Code-recognized uses in ESR-1893 | Roof panels only | Skylights, exterior walls and roof panels | ESR-1893, Section 5.3 |
| Shelf price, clear 26 in x 8 ft | $16.98 (Home Depot, Oct 20, 2026) | $32.99 (Anawalt Lumber, Oct 20, 2026) | Retailer listings |
Two results surprise most buyers. First, the PVC sheet is not the fire-safety downgrade it is often called: ESR-1893 classifies 0.8 mm Palruf as CC1 and 0.8 mm Suntuf as CC2 under IBC Section 2606.4, where CC1 means a burning extent of 1 inch or less in ASTM D635 and CC2 means a burning rate of 2.5 inches per minute or less. Second, Palram’s own sheet says Palruf “should be used only for open-sided, well ventilated projects,” while the Suntuf installation guide covers canopies, side walls and greenhouses.
PVC vs polycarbonate decision table
| If your project… | Choose | Threshold or reason (maker data) |
|---|---|---|
| Is open on at least one side and you want the lowest cost | PVC (Palruf) | $16.98 per 26 in x 8 ft sheet vs $32.99; Palram restricts PVC to open-sided, ventilated builds |
| Is enclosed (sunroom, closed greenhouse, insulated patio) | Polycarbonate (Suntuf or multiwall) | Palruf tops out at 120°F service temperature; Suntuf is rated to 212°F |
| Sits in hail country | Polycarbonate | Suntuf carries a 10-year impact warranty that names hail; Palruf’s 5-year warranty does not |
| Must carry 40 or 50 psf of snow load | Polycarbonate | Suntuf lists 24 in purlins at 40 psf and 16 in at 50 psf; the Palruf table stops at 30 psf |
| Has purlins already set at 24 in and a 30 psf load | Polycarbonate, or add purlins for PVC | Palruf needs 16 in purlins at 30 psf; Suntuf allows 30 in |
| Is a curved roof with a radius between 13 ft and 20 ft | PVC | Palruf bends to a 13 ft radius; Suntuf needs 20 ft or more |
| Is pitched below 1-1/2 in 12 | Raise the pitch, or seal every lap | Palram’s minimum recommended Suntuf slope is 1-1/2 in 12, with extra sealing below that |
| Is a commercial job where the inspector asks for CC1 plastic | PVC (Palruf), roof panel use only | CC1 per ESR-1893; Suntuf 0.8 mm is CC2 |
What are plastic roofing sheets and where are they used?
Plastic roofing sheets are rigid or semi-rigid panels made from polycarbonate, PVC, PET, or fiberglass-reinforced plastic that let filtered light through while shedding rain and snow. A 0.8 mm corrugated sheet weighs about 0.23 to 0.25 lb per square foot (1.12 to 1.2 kg/m² in ESR-1893), so 100 square feet of panel weighs about 25 lb before framing. Palruf and Suntuf both come 26 in wide in 8, 10 and 12 ft lengths, and Palram notes a 26 in Palruf panel covers 24 in once one corrugation overlaps the next sheet.
The common jobs are accessory structures, not primary house roofs. Palram’s Palruf sheet lists deck skirting, under-deck waterproofing, shade canopies, carports, awnings, walkway covers and patio covers; the Suntuf guide adds skylights, side walls and do-it-yourself greenhouses. Palruf also bends to a 13 ft minimum radius for curved awnings, against 20 ft for Suntuf. For a full framed patio structure rather than just the covering, see our guide to an attached gable roof patio cover.
Types of plastic roofing sheets compared
There are four plastic roofing materials in common use: polycarbonate (solid, corrugated and multiwall), PVC, PET, and fiberglass-reinforced plastic (GRP). ESR-1893 lists Palram’s Sunlite multiwall polycarbonate at 1.5 kg/m² for 8 mm twin wall and 2.7 kg/m² for 16 mm structured sheet, so multiwall weighs about 0.3 to 0.55 lb per square foot. The table compares the five sheet types on the specs that decide a purchase.
| Material | Impact resistance | Light transmission | Example maker warranty | Best for |
|---|---|---|---|---|
| Solid polycarbonate | Highest of the five | Up to 90% clear | Varies by line; check the sheet | Carports, patios, security glazing |
| Corrugated polycarbonate (Suntuf) | High; 10-year impact and hail warranty | 90% clear, 45% opal white, 35% solar gray | Lifetime limited (light transmission) | Patio covers, carports, greenhouses |
| Multiwall polycarbonate | High | Lower than single-skin; falls with wall count | Varies by line; check the sheet | Greenhouses, insulated patio roofs |
| PVC, corrugated (Palruf) | Rated “Good” in Palram’s good, better, best chart | 90% clear | 5 years limited | Open-sided sheds, deck skirting, budget covers |
| PET | Moderate to high | Up to 90% clear | Varies by maker | Recyclable clear covers, canopies |
| Fiberglass (GRP) | Moderate | Translucent, not clear | Varies by maker | Industrial rooflights, agricultural |
Polycarbonate roofing sheets
Polycarbonate roofing sheets are the strongest common plastic option, and Palram backs Suntuf with a 10-year warranty against impact damage, including hail. Suntuf is rated for service from minus 40°F to 212°F and has a co-extruded UV layer on one face (Suntuf UV2 has it on both). Palram’s guide says the panels melt at about 400°F, which opens a vent for smoke in a fire. Clear Suntuf transmits 90% of light; opal white transmits 45% and solar gray 35%.
Polycarbonate is the usual pick for carports, patio roofs and greenhouses because of that heat range and hail warranty. The trade-off is price and thermal movement: Palram says to pre-drill every hole with a 1/4 in bit for its Woodtite and Metaltite screws, snug the EPDM washer without crushing it, and never use an impact driver. For a closer look at panel options, thickness, and pricing, see our guide to polycarbonate roofing.
PVC roofing sheets
PVC roofing sheets are the budget choice, usually corrugated, and cost the least per square foot of any common plastic panel: $16.98 for a clear 26 in x 8 ft Palruf sheet at Home Depot on October 20, 2026. Palram rates Palruf “Best” for chemical resistance in its own good, better, best chart, ahead of Suntuf. The trade-offs are a 120°F upper service limit, a 5-year limited warranty, and Palram’s rule that Palruf belongs only on open-sided, well-ventilated structures.
PVC as a rigid sheet, about 0.03 in thick (0.8 mm in ESR-1893), is a different product from the PVC single-ply membrane used on commercial flat roofs. If you are pricing a welded flat-roof membrane instead of a translucent sheet, see our PVC roof cost guide.
PET and fiberglass (GRP) sheets
PET and fiberglass sheets fill the middle of the range. PET (the same polymer as drink bottles) is clear, recyclable, and sold as an alternative to polycarbonate for canopies. Fiberglass-reinforced plastic (GRP) is a corrugated translucent sheet with an industrial look, common on agricultural buildings and rooflights; a Sequentia WeatherGlaze 26 in x 8 ft panel listed at $34.99 at Knudson Lumber on October 20, 2026. Aging GRP can show surface fiber bloom.
How much do plastic roofing sheets cost?
Plastic roofing sheets cost about $1 to $5 per square foot of sheet in the October 20, 2026 retail listings below, with clear PVC at the low end and 16 mm triple-wall polycarbonate at the top. Brand moves the price as much as thickness: a 6 mm (1/4 in) LEXAN Thermoclear multiwall sheet listed at $279.68 at Home Depot, about $8.74 per square foot. Prices are material only; add screws, closure strips, flashing, framing and labor.
| Sheet (size) | Listed price | Per sq ft of sheet | Source, date |
|---|---|---|---|
| Palruf clear corrugated PVC (26 in x 8 ft) | $16.98 | $0.98 | Home Depot, Oct 20, 2026 |
| Suntuf clear corrugated polycarbonate, 0.032 in (26 in x 8 ft) | $32.99 | $1.90 | Anawalt Lumber, Oct 20, 2026 |
| Sequentia WeatherGlaze corrugated fiberglass (26 in x 8 ft) | $34.99 | $2.02 | Knudson Lumber, Oct 20, 2026 |
| 8 mm twinwall polycarbonate, clear (4 ft x 8 ft) | $75.40 | $2.36 | Polycarbonate Store, Oct 20, 2026 |
| 16 mm triple-wall polycarbonate (4 ft x 8 ft) | $158.40 | $4.95 | Polycarbonate Store, Oct 20, 2026 |
| LEXAN Thermoclear multiwall, 1/4 in (4 ft x 8 ft) | $279.68 | $8.74 | Home Depot, Oct 20, 2026 |
Worked example for a 16 ft wide by 8 ft deep lean-to under a 30 psf design load: at 24 in of coverage per 26 in sheet, the roof takes 8 sheets of 8 ft panel. Palruf costs 8 x $16.98 = $135.84 and needs purlins at 16 in, so 7 rows across the 8 ft depth. Suntuf costs 8 x $32.99 = $263.92 and allows purlins at 30 in, so 5 rows. Confirm Suntuf’s coverage width on the sheet label, since the Greca 76 profile differs from Palruf’s round wave. The $128.08 sheet premium buys back 2 rows of purlins, a hail warranty and a 212°F rating.
What thickness of plastic roofing sheet do I need?
Thickness depends on the structure, the purlin spacing, and your snow load, not just the panel size. For corrugated sheet, the maker’s load table sets the purlin spacing: Suntuf allows 36 in at 20 psf down to 16 in at 50 psf, and Palruf allows 24 in at 20 psf or 16 in at 30 psf. For flat multiwall sheet, ESR-1893 recognizes Sunlite twin wall and triple wall at 8 mm and 10 mm and structured sheet at 16 mm for roof panel use. The list below gives editorial starting points; confirm each against the maker’s span chart for your load.
- Patio or veranda roof: 10 mm multiwall polycarbonate balances light, insulation, and span. Move to 16 mm for enclosed verandas.
- Carport: 10 mm multiwall, or corrugated polycarbonate on 24 in purlins, which Suntuf’s table rates for 40 psf.
- Greenhouse: 6 mm twinwall for hobby greenhouses, 8 mm or 10 mm where weather is harsher, for insulation and diffusion.
- Shed or temporary cover: corrugated PVC on 24 in purlins (20 psf) where the sides stay open and budget beats longevity.
- Heavy snow load: 16 mm or 25 mm multiwall, or corrugated polycarbonate on 16 in purlins (50 psf), per the manufacturer span chart.
Plastic sheets vs corrugated metal for a carport or patio
Choose plastic sheets when you want daylight through the roof and easy DIY handling; choose corrugated metal when you want a solid opaque roof that cannot yellow. A 0.8 mm plastic sheet weighs about 0.25 lb per square foot and transmits up to 90% of light, while steel panels block all light. Palram’s 212°F ceiling for Suntuf and 120°F for Palruf also matter above a grill or flue vent. Many carports use both: metal for the main roof and a run of clear polycarbonate for a daylight strip.
If you are weighing an opaque metal cover instead, note that IRC R905.10.2 allows lapped metal panels down to 1/2 in 12 with lap sealant and 3 in 12 without it. Compare sizes and pricing in our guide to corrugated roof panels. For a translucent alternative that behaves more like a fixed roof window over a living space, see how skylight installation cost compares.
Installation and maintenance basics
Plastic roofing sheets install over purlins with EPDM-washered screws driven through the crown of a corrugation on roofs and through the valley on vertical walls, per the Suntuf guide. Palram calls for 2 in screws on roofs, a screw on every other rib (every rib in high-wind areas), and 1/4 in pre-drilled holes for thermal movement. Lay sheets label side up so the UV layer faces the sun, start from the side opposite the prevailing wind, and give Palruf end laps of at least 6 in.
Maintenance is light. The Suntuf guide says to clean the panels with lukewarm soapy water and a soft cloth or sponge, never with ammonia-based glass cleaners or abrasive brushes. Both Palram guides say never to step on the sheets; use a board that spans at least three rafters or structural members to spread your weight. To place plastic roofing in the wider material picture, browse our roofing knowledge hub.
Which plastic roofing sheet should you choose?
For a roof that must take hail, heat or enclosed-space temperatures, choose polycarbonate; for the cheapest open-sided cover, choose PVC. Pick multiwall polycarbonate for patios and greenhouses where insulation and light diffusion matter, corrugated polycarbonate where you want 90% clarity on standard 24 in purlins, and corrugated PVC for open sheds and deck skirting under 120°F. Match the profile to your purlin spacing and load from the tables above, and install the UV face up. Our guide to greenhouse roof panels compares panel materials by light transmission and lifetime cost.
Plastic roofing sheets: frequently asked questions
What is the cheapest plastic roofing sheet?
Corrugated PVC is the cheapest plastic roofing sheet. A clear 26 in x 8 ft Palruf PVC panel listed at $16.98 at Home Depot on October 20, 2026, about $0.98 per square foot of sheet, versus $32.99 for the same size of Suntuf polycarbonate. Palram warrants Palruf for 5 years and limits it to open-sided, well-ventilated structures.
Which is better, polycarbonate or PVC roofing sheets?
Polycarbonate is better for heat, hail and snow load. Palram rates Suntuf polycarbonate from minus 40°F to 212°F with a lifetime limited warranty and a 10-year hail warranty, against minus 4°F to 120°F and a 5-year warranty for Palruf PVC. PVC wins on price, chemical resistance and a CC1 fire classification in ICC-ES report ESR-1893.
How thick should plastic roofing sheets be?
For flat multiwall sheet, 8 mm or 10 mm twin wall suits most patios and carports, and ESR-1893 recognizes Sunlite multiwall at 8, 10 and 16 mm for roof panels. For corrugated sheet, purlin spacing matters more than thickness: Suntuf allows 36 in at 20 psf and 16 in at 50 psf, while Palruf allows 24 in at 20 psf and 16 in at 30 psf.
Do plastic roofing sheets go yellow?
Plastic sheets can discolor if the UV-protected face points down. Palram warns that installing Suntuf upside down will discolor the panel, and warrants Suntuf for life against losing more than 10% of its light transmission. Palruf PVC carries a 5-year limited warranty. Install every sheet label side up, facing the sky.
Can you walk on plastic roofing sheets?
You should not walk directly on plastic roofing sheets, even impact-resistant polycarbonate. Palram’s Suntuf and Palruf instructions both say never to step on the sheets and to use a sturdy board that spans at least 3 supports, which is a board of 48 in or more on purlins set 24 in apart. Working from a ladder or platform beside the roof is safer for cleaning and repairs.