UPVC Door Frames with plastic trim. Figure 2

The barrier seals against the flat outside surface of the doorframe as shown --------
The barrier needs to overlap (approx) 1 ½ inches (38mm) each side of the doorframe to allow the barrier to clip onto the doorframe (FIG 2 and 2a).
Choose the barrier size that avoids the plastic trim at the edge of the doorframe.

Figure 2a