Polycarbonate Store

06/17/2026

Not all polycarbonate cappings do the same job.

In this quick guide, Meredith walks through the different polycarbonate cappings we offer, including Joiner Caps (H Channels), End Caps (U Channels), Side Caps (F Channels), and Corner Caps (R Channels), explaining what each one does and where it's typically used.

She also takes a look at our Aluminum Bar Cap option available locally through our Skagit Valley shop. And if you've been looking for more aluminum capping choices, keep an eye on us. Something new is coming soon. 👀

Choosing the right capping can help simplify installation and create a cleaner finished project. If you're not sure which profiles are right for your build, our polycarbonate experts are always happy to help. Reach out today: https://hubs.li/Q04lBr5-0

06/16/2026

From a lightweight greenhouse that couldn't handle the wind to a custom-built greenhouse designed for years of growing. 🌱

This beautiful Camano Island project combines 10mm Triple Wall Heat Saver Polycarbonate, smart ventilation, creative reuse of secondhand materials, and a design tailored to the homeowner's goals.

Our latest blog post takes you behind the build and explores the material choices, installation details, and planning decisions that brought it all together.

Read the full project story on our blog: https://hubs.li/Q04lvlKH0

06/08/2026

A sharp-looking build from south-central Louisiana.

This custom greenhouse features clear 10mm twinwall polycarbonate on both the walls and roof, with our durable dark brown aluminum bar cap and rubber gaskets used to securely fasten the sheets while creating a clean finish. The calming color, double doors, and ponywall give it plenty of character while keeping the structure practical and functional.

Materials used on this project included:
• 10mm Twinwall PolycarbonateSheets
• Brown Aluminum Bar Cap with Rubber Gaskets
• Polycarbonate End Caps & Joiner Caps
• Foam Glazing Tape
• Solid Aluminum Tape & Vented Polycarbonate Tape
• Sikasil-N Plus Silicone Sealant
• Fasteners and Gasket Washers

Planning your own greenhouse or outdoor build? Reach out anytime for a custom materials and shipping quote tailored to your project.

05/26/2026

This DIY greenhouse build in Olympia, WA is a great example of using the right materials for a wet climate.

The structure was built with milled lumber from their own backyard fir tree, paired with repurposed windows for the sidewalls. For the greenhouse roof, they needed something that looked good, installed clean, and could handle rainy conditions.

They landed on twinwall polycarbonate panels.

Polycarbonate is a strong choice for greenhouse roofing in the Pacific Northwest. It’s lightweight, durable, and handles moisture well when paired with the right sealing components.

With help from our team, they put together a setup that fit the build and made installation straightforward.

Materials used:
• 6mm Twinwall Polycarbonate Sheets
• Joiner Cap
• End Cap
• Foam Glazing Tape
• Gasket Washers
• Washer Head Screws
• Sikasil-N Plus Silicone Sealant

If you’re planning a DIY greenhouse or figuring out what to use for a custom roofing project, our team can help you sort through the details and build a complete materials list for your project. Start a quick chat now: https://hubs.li/Q04dBwBd0

05/25/2026

This Memorial Day, Polycarbonate Store will be closed as we take time to honor and remember those who gave their lives in service to our country.

We’re grateful for the sacrifices made and wish everyone a safe and meaningful holiday.

We’ll be back and ready to help with your next project on Tuesday.

05/11/2026

From first panel to final screw, this one came together right.

Built with our 8mm twinwall polycarbonate, capping, and install accessories for a tight, durable setup that’s ready for the long haul.

“I really appreciate all of your help and patience as I worked through this process. Your products are great and so was your support.”

Good materials matter. So does having the right support behind them.

04/27/2026

This customer built their own cedar greenhouse using our polycarbonate materials and sealing components and the results speak for themselves.

"We are so happy!! The other morning when the temperature dipped to just 32 degrees, the inside of our greenhouse was still a balmy 67 degrees with no supplemental heating!"

That kind of performance comes down to panel choice, proper sealing, and how everything is put together.

Materials used:
• 16mm Triple Wall Polycarbonate Sheets
• 16mm 5X-Wall Storm Sheets
• Polycarbonate End Cap (U Channel)
• Brown Aluminum Bar Cap
• 16mm Aluminum U Channels (special request)
• Vented Polycarbonate Tape
• Foam Glazing Tape
• Sikasil-N Plus Silicone Sealant
• Gasket Washers
• Washer Head Screws
• Zinc Plated Pan Head Screws

If you’re planning a greenhouse or similar project, our Project Planner Tool will help you map out exactly what you need. Tell us about your build and we’ll send you a materials list to get started: https://hubs.li/Q04dr09v0

04/16/2026

Built for Maine winters. Still going strong.

Jacquesinthegarden of Epic Gardening built this 12x16 DIY greenhouse using polycarbonate for one big reason: flexibility. Easy to cut, easy to customize, and built to handle real conditions.

16mm triplewall on the roof for snow load. 10mm on the sides. Buried in snow outside, warm and usable inside.

That’s the difference when you build it right.

See the full project and how it came together: https://hubs.li/Q04cbTNL0

04/08/2026

If polycarbonate shipping caught you off guard, you’re not the only one.

There’s a lot happening behind the scenes with freight, crating, and delivery, and crate size is what really drives the cost.

The good news is, with a little planning upfront, you’ve got solid ways to keep it manageable.

04/03/2026

Update on Jacques' Epic Gardening DIY Greenhouse featuring Polycarbonate Store panels and Charley's Greenhouse solar exhaust fan system: Looks like the Epic team has been working hard on staging and setting her up perfectly to use this spring!

Can't wait to see all the great glow-ups in store for the Maine property in this series.

A greenhouse is every gardener’s dream, but it’s what you put inside that makes it work. In this episode, the team, Home Depot and creators li...