Polycarbonate costs about $1-$8 per square foot for sheets, while installed projects commonly run $8-$25 per square foot depending on thickness, panel style, framing, and labor. Solid sheets generally cost more than twinwall panels, and custom cuts, difficult access, and local labor rates can raise the final quote.
| Item | Low | Average | High | Notes |
|---|---|---|---|---|
| Twinwall sheet material | $1/sq ft | $2.50/sq ft | $5/sq ft | Common greenhouse and patio-cover panels |
| Solid sheet material | $2/sq ft | $5/sq ft | $10/sq ft | Price varies with thickness and UV protection |
| Installed panel system | $8/sq ft | $15/sq ft | $25/sq ft | Includes typical framing and installation labor |
| Custom cutting | $5/order | $20/order | $75/order | May be charged separately from sheet price |
What polycarbonate sheets cost by thickness and type
Material prices depend on whether a project uses lightweight multiwall panels or solid, glass-like sheets. Basic twinwall panels around 4 mm thick often cost $1-$3 per square foot; thicker 8-10 mm panels commonly run $2-$5. Solid polycarbonate around 1/8 inch thick may cost $2-$5 per square foot, while 1/4-inch sheets can reach $4-$8 or more.
For a material-only budget, $2-$5 per square foot is a practical starting range for many residential panels. Specialty colors, abrasion-resistant coatings, higher UV protection, and oversized sheets can exceed these ranges. Assumptions: Standard clear sheets, retail quantities, and ordinary U.S. shipping.
How sheet, framing, and labor shape a panel quote
An installed price includes more than the panel itself. Framing, compatible fasteners, closure strips, sealants, cutting, and edge finishing can add substantially to the material budget. Installers may price a small job by the project rather than by square foot, especially when setup and travel take a large share of the work.
| Quote component | Typical price | What it covers | Common cost effect |
|---|---|---|---|
| Polycarbonate panels | $1-$10/sq ft | Twinwall or solid sheets | Thickness and coating determine rate |
| Framing and supports | $2-$8/sq ft | Aluminum, wood, or steel members | Long spans may need stronger framing |
| Fasteners and trim | $0.50-$3/sq ft | Screws, caps, closures, and sealants | System compatibility matters |
| Installation labor | $3-$10/sq ft | Layout, cutting, fastening, and cleanup | Access and roof pitch affect time |
| Removal and disposal | $1-$4/sq ft | Taking down and hauling old panels | May have a minimum service charge |
Labor commonly accounts for a large share of a fitted panel system, particularly on small or complicated jobs. A basic labor estimate can be checked with ; many contractors charge roughly $50-$100 per hour, with local variation.
Which thickness and panel span change the price?
Thickness affects both sheet price and the support structure needed. A 4 mm twinwall panel suits some small greenhouse applications, while 8-10 mm panels are often selected for greater rigidity or insulation. Solid sheets from 1/8 to 1/4 inch are heavier and typically cost more per square foot.
Span and wind exposure also change the quote. A panel spanning more than about 24-36 inches may need additional supports, depending on thickness, loads, and manufacturer specifications. Curved roofs, high-wind locations, and snow-load requirements can call for closer framing or stronger panels. Confirm the permitted span from the panel manufacturer before comparing bids based only on sheet price.
Three common projects show installed price differences
A 100-square-foot greenhouse roof using basic 4 mm twinwall panels might cost $800-$1,500 installed, assuming a sound existing frame and straightforward access. A 200-square-foot patio cover with 8 mm panels and new aluminum supports may run $2,400-$5,000. A 60-square-foot solid-sheet wind screen with custom cuts and edge finishing may total $900-$1,800.
These examples are planning ranges, not fixed national rates. They assume ordinary residential work; structural repairs, permits, specialty finishes, and old-panel removal may add charges. A quote should state panel thickness, framing material, included accessories, and whether tax and disposal are included.
What installers charge to cut and mount panels
Simple ground-level installation may take a two-person crew several hours for a small area, while a large roof or custom enclosure can require one or more days. Roof pitch, ladder or lift access, panel alignment, and weather protection affect crew time. Some companies apply minimum labor or trip charges of $150-$400, even when the covered area is small.
Custom fabrication can add approximately $5-$75 per order, with more for repeated precision cuts or complex shapes. Removing existing glazing may add $1-$4 per square foot, and disposal or hauling can be billed separately. Ask whether the estimate includes cutting, edge tape, sealing, fasteners, cleanup, and removal.
When twinwall, solid polycarbonate, or acrylic fits the budget
Twinwall is usually the lower-cost choice for greenhouse roofs and covered outdoor areas where insulation and low weight matter. Solid polycarbonate provides a clear, impact-resistant surface but commonly costs more. Acrylic may cost about $2-$7 per square foot for basic sheets, though it is less impact-resistant than polycarbonate and can be a poor substitute where impact strength is essential.
For a like-for-like comparison, check sheet thickness, UV protection, clarity, warranty, and required support spacing. The cheapest sheet may not produce the lowest installed cost if it requires extra framing or more frequent replacement.
How to lower a polycarbonate project’s total cost
Keeping the design rectangular and using standard sheet sizes can reduce offcuts and custom fabrication charges. Choosing a panel thickness that meets the span and local load requirements avoids paying for unnecessary material, while using an existing sound frame can reduce labor and framing costs. Avoid comparing a basic panel quote with a premium coated system unless the specifications match.
Get at least three itemized estimates for larger projects and compare the same square footage, panel type, thickness, framing, and included accessories. Scheduling outside peak contractor demand may improve availability, but weather-sensitive roof work can be delayed. Do not cut costs by skipping required support, sealing, or code compliance; premature leaks or panel failure can erase the initial savings.
Why regional labor and delivery shift the final price
Installed prices in high-cost metro areas can be about 10%-25% above typical national planning ranges, while rural areas may have lower labor rates but higher delivery or travel fees. Regions with heavy snow, strong winds, or intense sun may require thicker panels, closer support spacing, or UV-rated products, adding roughly 5%-20% compared with a basic specification.
Large sheets can also incur freight charges, especially when delivered outside a supplier’s regular service area. Request a delivered material price and a separate installation price so regional labor and shipping are visible in the total.