6mm Polycarbonate Joiner Cap

Simplify Assembly - for 6mm Polycarbonate

Adding MultiWall to your wood framework is easier when using these special pieces to hold the panels in place. The Caps are made of a tough, sunlight-resistant UVI polycarbonate, and are weatherproof and maintenance-free. 2-7/8" across (longest side). 

Poly 101 PDF - How To Install Polycarbonate Panels

Use joiner cap to connect polycarbonate over studs and rafters.

Always install Joiner Caps wide side down.

Builder's Notes: Caps are easily cut to length with a hacksaw.

*** PLEASE NOTE:  All Joiner Caps require special UPS Oversize Shipping charges, or Motor Freight charges. These charges will be higher than the standard shipping charges shown for these items in the shopping cart checkout process. Before shipping, Charley's will contact you for approval of any additional shipping costs.

(Joiners over 12 ft are cut out of a 24 ft Joiner)

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Poly 101 Question:  I noticed it said you recommended a 24 1/2" OC framing. If it is just "24 OC" Does that mean with your clear joiner caps each panel will need 1/2" shaved off the width? Or is there a way to make it compatible without modifications to the panels?
Answer:  Either rip the panels to 23.5" or layout framing at 24.5" O.C.  The Joiner Caps have a ½" spacing gap for screws in the center, and this forces the frame spacing to 24-1/2" O.C.
(NOTE:  You can use the aluminum Bar Caps on the roof and use framing at 24" O.C., but this forces the panels to fit tightly together, without room for expansion, okay for a small project.)