In message ,
Jonathan writes
I have frenchwindows with a softwood threshold. This receives an
enormous amount of damage from people standing on it. Before replacing
the whole frame, I thought a metal strip to protect it might be the
answer but I cannot find one.

Has anyone any recommendations?

aluminium chequer plate?

eg

http://www.wickes.co.uk/Wickes-Metal...erplate-120-x-
1000mm/p/116695

There are places that will sell it cut to size
--
Chris French