Polycarbonate Greenhouse Materials | Panels, Roofing, & Glazing

High-performance glazing, roofing, and building materials for punishing exterior applications.


What is Polycarbonate Twinwall?

Twinwall polycarbonate provided by Interstate Plastics is the ideal glazing material for many outdoor applications including roofing, hobby and commercial greenhouses and window replacement. Twinwall’s notorious double paneled sheets serve to trap air, therefore increasing the product’s insulation strength. Insulation properties will increase depending on the material’s thickness.

Twinwall’s surface is protected from the degradation effects of UV radiation by a proprietary co-extrusion process. Beneficial infrared light passes through the material promoting an ideal growth environment. UV-resistant Twinwall is twelve times lighter versus glass and the resins comprising the material are specially developed for excellent flame retardant properties.


  • Highly flexible
  • Extreme durability and impact resistance
  • UV protected from the elements
  • Easy to machine and install
  • Air layer for insulation
  • Lightweight versus wood and steel
  • High light transmission
  • Multiple colors available
  • Flame retardant

[Twinwall Installation Guide PDF]

[Polygal Features and Benefits PDF]

[Polygal Multiwall Warranty PDF]

[Polygal Anti-Fog Warranty PDF]

[TopGal Multiwall Standing Seam System PDF]

Polycarbonate Wind Load Charts

These charts show wind loads and sheet deflection that should be taken into account when designing a covering. Use of the graph indicators is quick and easy, and is intended to provide information of a type generally acceptable in civil engineering. Each chart provides data for 3 different sheet widths with the maximum proportional deflection being 1:20 or 5% of the specific width.

The right-hand area, where the curves become more horizontal, measures specifically and only sheets clamped at 2 sides. The left-hand area measures specifically sheets glazed in frames with supports perpendicular to the sheet ribs. For structures built in areas with variance in meteorological conditions, the use of adequate safety factors is recommended in order to reduce risks.

The data and information in this section is given in good faith but only as basic technical support for engineers of various structures. In no way can this information be substituted for the responsibility and liability of the designing engineer of a structure as determined by law. The information pertains to the roofing material only and does not in any way determine the strengths required in a supporting structure or in various glazing systems.

Wind Load Charts:
Polygal Standard 8 mm (5/16") sheet
Polygal Standard 10 mm (3/8") sheet
Polygal Standard 16 mm (5/8") sheet
Titan 10 mm (3/8") sheet
Titan 16mm (5/8") sheet
Selectogal (RFX) 16mm (5/8") sheet
Thermogal 32mm (1 1/4") sheet
Thermogal 35mm (1 3/8") sheet
Triple - Clip 16mm (5/8") Panel

.236" (6mm) Twinwall Accompanying Parts
.315" (8mm) Twinwall Accompanying Parts
.394" (10mm) Twinwall Accompanying Parts
.630" (16mm) Twinwall Accompanying Parts

U Profile #215
Base/Cap #207/#211
Vent Tape
Screw #422
Bubble Washer #473
Foam Spacer #505
Ridge Profile (please call)
F Profile (please call)

Polycarbonate Twinwall Applications

Polycarbonate Twinwall is used in construction and agricultural industries as well as many DIY applications.

Weather and Impact Protection
Lighter and easier to install versus metal, and more protective than wood, you can rely on Interstate Plastics' selection of polycarbonate storm protection systems. Our RDC Storm Panels for commercial businesses and homes protect windows from strong winds and flying debris during hurricane season. They allow in light while guarding your windows and doors against hurricane force winds, flying debris, and severe weather.

Design & Architecture
Polycarbonate Twinwall finished plastics give a sense of openness and flow while maintaining protection, durability and strength for years to come.

Agriculture & Greenhouses
Virtually unbreakable, withstands UV rays, hail and extreme weather. Multi-wall sheets provide the best thermal insulation of any greenhouse and agricultural coverings.

Windows, Glazing & Light Transmission
Enlist nature's qualities for interior atmosphere. Perfect for building lighting, open passageways, pools, verandahs, interior design elements, display windows and exhibitions.

Patio & Awnings
For home and commercial design, Twinwall is like putty in your hands - almost any project, however unique it may be, can be implemented with polycarbonate Twinwall.

DIY
From wind shields to shelters, custom greenhouses and art projects, polycarbonate twinwall can be cut and drill using standard wood working tools. It's also good for drilling, trimming, bending and bonding (use Weld-On 55 "glue").

Cold Aisle Containment & Data Center Solutions
Interstate Plastics has a wide variety of polycarbonate twinwall solutions that address cooling issues associated with data centers and other IT systems. Proper planning in air flow management eliminates hot spots, gets cool air to where it needs to be, and saves money by cutting down on the electrical cost of air conditioning.

Data centers, server rooms and other IT racks are generally lined up in alternating rows with a walkway in-between where the front of the equipment faces each other to create a "cold aisle", and the exhausts from the equipment also face each other to create a "hot aisle".

Our polycarbonate twinwall can be utilized as an effective physical barrier (with significant advantages over PVC vinyl aisle containment curtains) between server racks and other equipment as its thermal properties allow for alternating cold and warm isles to sit side by side without significant heat transfer between the twinwall and multiwall sheets.

Working with Polycarbonate Twinwall

Cut and drill using standard wood working tools:

Cutting can be done on a standard circular, jig, or table saw with a blade having 8-12 teeth per inch. Thinner gauges can be cut with a box knife.

Drilling is performed with standard wood drill bits.

Trim with a standard box cutting knife.

Bending is done by cold forming along the direction of the flutes. Bending guides are available.

Bonding ("gluing") can be done with Weld-On 55 adhesive.

Greenhouse Solutions

Get growing with the Snap & Grow 6' x 8' Silver Frame Hobby Greenhouse from Palram Canopia. Heavy duty aluminum frames assemble easily without much hardware. Crystal-clear polycarbonate panels slide right into the frame, lock into place and are virtually unbreakable.

Aluminum framework, clear single layer polycarbonate panels, swinging front doors, rain gutter and roof vent are standard features of the Snap & Grow greenhouse. It comes with an easy to use set-up manual and is available in standard silver or a green powder coat.

Make any backyard a sanctuary - in a snap!

Prop 65 WarningWARNING: This product can expose you to chemicals including Bisphenol A, CAS 80-05-7, which are known to the State of California to cause birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

Product Title
Product Description

 

Endless applications for architectural design, roofing, glazing, windows and installations.
Polycarbonate Twinwall - Clear
Endless applications for architectural design, roofing, glazing, windows and installations.
Polycarbonate Twinwall - Ice (Opal)
Endless applications for architectural design, roofing, glazing, windows and installations.
Polycarbonate Twinwall - Bronze
Endless applications for architectural design, roofing, glazing, windows and installations.
Twinwall Red
Endless applications for architectural design, roofing, glazing, windows and installations.
Twinwall Green
Endless applications for architectural design, roofing, glazing, windows and installations.
Twinwall Yellow
Endless applications for architectural design, roofing, glazing, windows and installations.
Twinwall Blue
16mm RDC Storm Panels for commercial businesses and homes protect windows from strong winds and flying debris during hurricane season.
16mm Polycarbonate Hurricane and Storm Pane
Allows light in while protecting your windows and doors from hurricane force winds, flying debris, and severe weather.
Polycarbonate Hurricane Storm Panel Kits
Rigid and lightweight corrugated polycarbonate panels for greenhouses and outdoor applications.
Clear Corrugal Polycarbonate Plastic Sheet - Polycarbonate Roof Panels
Rigid and lightweight corrugated polycarbonate panels for greenhouses and outdoor applications.
Ice (Opal) Corrugal Polycarbonate Plastic Sheet - Polycarbonate Roof Panels
Greenhouse plastic sheet, a polycarbonate multiwall sheet, offers architectural glazing solutions.
Clear Thermaglas
Polycarbonate panels for greenhouses from the polycarbonate manufacturer Palram.
Opal Thermaglas
Polycarbonate Multiwall: Greenhouse plastic sheet from the leading polycarbonate sheet suppliers.
Bronze Thermaglas
Aluminum vent tape for polycarbonate multi-wall applications
Aluminum Vent Tape

 


 

Complete (base #353, cap #352, cap cover #308, gasket #504)
Mega-Lock Aluminum Glazing System 6-16
For use with .394" (10mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Base/Cap 205/209
For use with .630" (16mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Base/Cap 207/211
For use with .236" (6mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Divide H #201
For use with .315" (8mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Divide H #202
For use with .394" (10mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Divide H #203
For use with .236" (6mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Endcap U #212
For use with .315" (8mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Endcap U #213
For use with .394" (10mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Endcap U #214
For use with .630" (16mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Endcap U #215
For use with .236" (6mm), .315" (8mm), and .394" (10mm) Polycarbonate Twinwall
Polycarbonate Clear Extruded Base/Cap #230/#231
Polycarbonate Ice (Opal) Extruded-Base/Cap
Polycarbonate Ice (Opal) Extruded-U' Endcap'
Polycarbonate Bronze Extruded-Base/Cap
Polycarbonate Bronze Extruded Divide H Chan
Polycarbonate Bronze Extruded-U' Endcap'
8 mm. (#311)
Aluminum Clear Anodized Endcap U #311
10 mm. (#312)
Aluminum Clear Anodized Endcap U #312
16 mm. (#313)
Aluminum Clear Anodized Endcap U #313
(Part #400) Point-fastening 2 in. hex screw with bubble washer.
#12 Polygal Self Drilling Hex Screw (100 count)
(Part #422) Point-fastening 6-16 mm. screw with bubble washer.
2 inch #9 Wood Screw (100 Count)
(Part #450) Supports base-to-metal structures.
1 Inch Mega-Lock Screw (100 Count)
(Part #462) 5/8” Length
5/8 Inch Mega-Lock Screw (100 Count)
(Part #421) Supports ECP/HCP/GCP profile with a base-to-wood structure.
1.5 Inch #9 Wood Screw (100 Count)
(Part #412) Supports HCP profile with a base-to-metal structure.
1.5 Inch #12 Self Drilling Hex Screw (100 Count)
(Part #505)
1 Inch Twinwall Foam Spacer
(Part #473)
1 Inch Bubble Washer
(Part #463) 7/8” Length
7/8 Inch Mega-Lock Cap-to-Base Metal Screw (100 Count)
 
1 Inch #12 Self Drilling Hex Screw (100 Count)
(Part #472)
1 Inch Aluminum Washer with Gasket

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