*** NOTE WHEN USING CHANNEL ON 2″ SQUARE LATTICE ***
The 1/2″ U-Channel will not fit tightly on the DuraShell® 2″ Square lattice sheets if the sheet is not cut down to where there are double slats. Shims or the 1/4″ U-Channel (available in Snow White only) may be used. 1/2″ H-Channel would need to be shimmed if connecting sheets where there are single slats.
How to Install Vinyl Lattice Using Durashell – (permalatt.com)