board up

board up (third-person singular simple present boards up, present participle boarding up, simple past and past participle boarded up)

1. (transitive) To block doors or windows with boards, either to prevent access or as protection from storms, etc.
   • 1941 May, J. Ronald Hayton, “The Chattenden & Upnor Narrow-Gauge Railway”, in Railway Magazine, page 208:

     The metals from Upnor to the boarded-up Tankfield signal box (by a gateless level crossing) were very rarely used.