Why We Only Sell 8mm (5/16") Polycarbonate: Strong and Smart

📏 Why We Only Sell 8mm Polycarbonate Sheets

At ApexPolyPro, we focus on one size: 8mm twin-wall polycarbonate (also called 5/16").And there’s a good reason for that.

🛡️ Stronger Than Thinner Sheets

Thinner panels like 4mm can crack in heavy rain or strong wind.Our 8mm sheets are thick enough to handle tough PNW weather.

🌡️ Better Insulation

More thickness = more air between the walls.That means better heat retention for greenhouses and outdoor spaces in Oregon and Washington.

🔨 Still Easy to Work With

Even at 8mm, these sheets are lightweight and simple to cut.You can install them on patios, roofs, carports, or greenhouses with just basic tools.

💧 Ideal for Wet, Windy Conditions

The Pacific Northwest gets a lot of rain, cold nights, and wind.8mm panels hold up through it all — without sagging, bending, or leaking.

🧩 All Accessories Match

Our H- and U-profiles, vented tape, and screws are all designed to fit 8mm sheets.No guesswork, no gaps — just clean, solid results.

🚛 Delivered Weekly in WA and OR

We deliver 8mm sheets every Saturday across Oregon and Washington.Smart choice, strong material, easy to order.