Better weather sealing The threshold includes a bulb seal to help improve weather sealing at the bottom of the door.
Why 3-part? 3-part means it does a neater job at the frame leg by extending to the edge of the frame leg. If you want it to extend further, to line up with another element of the opening, just let us know and we’ll provide an extended length for you to cut to size on site.
Does it require more work? On a level threshold surface in good condition, the three parts just interlock and are held by fixing through the centre section. On a less ideal threshold surface, you may need to fix through the front or rear section for a flush finish with the threshold surface.
A small change with a great benefit – improved weather protection and a neater finish.



01 Mar 2026
We're excited to be exhibiting at Data Centre World at the Excel London - The largest data centre event in the world!
11 Feb 2026
Watch the webinar overview of the Somlink tool.
11 Feb 2026
Watch step by step how to install a CarTeck DRIVE 500/600 garage door motor and programme a remote control.