Collection: FAQ

Polycarbonate Sheets

Can polycarbonate sheets be stored in direct sunlight during construction?

It's best to avoid leaving polycarbonate sheets out in the sun while you’re building. Each sheet comes with a protective film to keep it from getting scratched, but if the sheet is left in direct sunlight, the heat can bake that film onto the surface, making it almost impossible to remove without damaging the polycarbonate.

Can multiwall polycarbonate sheets be installed horizontally (channels running side-to-side)?

Nope! Multiwall polycarbonate has small internal channels that need to run vertically so condensation can drain properly. If the sheets are installed horizontally, moisture can build up, leading to mold and a cloudy appearance.

What side of the sheet is UV resistant?

The printed side is the UV-resistant side. If there’s no writing, look for the blue side.

What thicknesses of polycarbonate do we stock?

We’ve got you covered in both metric and standard:

4mm (3/16”)
6mm (1/4”)
8mm (5/16”)
10mm (3/8”)
16mm (5/8”)
25mm (1”)

Extrusions

What extrusion lengths do we stock?

8’ and 12’ lengths.

How does the H-Profile (Joiner Cap) work?

It’s used to join two sheets together lengthwise. You just slip the panels into the joiner to connect them.

Which side of the H-Profile (/Joiner Cap) is the UV resistant side?

The UV protection is on the shorter side of the H-Profile (Joiner Cap)

How does end cap work?

End caps go on the exposed ends of your polycarbonate sheets. They allow water to drain out while keeping dirt and debris from getting inside. And don’t forget, the short side should be installed facing outward to protect from UV rays!

Hardware

Where do I use washer head screws?

You’ll need these when attaching the H-Profile (Joiner Cap) or when drilling through the panels into your framing.

What about gasket washers?

These are used when screwing directly through the polycarbonate panels. They help spread the pressure to avoid denting your polycarbonate.

Where should I apply caulk?

Caulk goes in the U-channel or end cap. Push the cap halfway in, run a small bead of silicone from left to right, then push the cap in the rest of the way.

Where does foam glazing go?

You’ll want to apply foam glazing anywhere the polycarbonate panels touch your framework. It helps create a snug fit.

What’s the recommended fastener spacing?

Fasteners should be spaced 8” to 12” apart along the joiners, and 24” apart when screwing directly through the polycarbonate. Be sure to keep screws 6” in from the edges of each purlin support.

Local Order Pickup

Where can I pick up my order?

If your order is set for local pick-up at our US location, swing by our shop and warehouse at:

17979 State Route 536
Mount Vernon, WA 98273

Just let the friendly folks at our Polycarbonate Store / Charley’s Greenhouse & Garden front desk know you’re here, and then you can pull your vehicle around to the back at our warehouse entrance.

What should I know before picking up my polycarbonate order?

Your safety and the condition of your panels are our top priorities! Polycarbonate sheets are lightweight but still need a little TLC during transport.

How should I prepare for loading my polycarbonate sheets?

Make sure to have a clean area free of rocks and debris for loading. Since the sheets are individually loaded and not packaged, having clear, clean space is key.

How can I ensure my polycarbonate panels are transported safely?

Supporting the overall length of your polycarbonate panels is super important! If you don’t have a trailer the same length as your longest panel, a pick-up truck can do the trick. We suggest bringing along some 2” x 4” lumber or plywood sheathing for the panels to rest on or lean against.

What equipment should I bring for transporting polycarbonate sheets?

It’s always a good idea to plan ahead! Bring along red over-length flags if needed, adequate tie-downs, and something to protect your panels from scratches.

Will someone assist me in loading my order?

We’re more than happy to help you load your order! Just a friendly reminder: while we’re here to lend a hand, you’ll need to take charge of the tie-downs. Please make sure everything that you have safely secured everything before you leave our warehouse.

Still have questions?

Our knowledgeable experts are ready to help you with any questions you may have about our products.