masonry guard

plaster guard

On a hollow metal doorframe, a shield attached behind the hinge and strike reinforcement to prevent mortar or plaster from entering the mounting holes when the frame is grouted.
References in periodicals archive ?
Masonry guard wall for retaining ob heap area at lalmatia hatia rehab site.
Solicitation: George washington parkway historic masonry guard wall repair
cover slab protection work with masonry guard wall from the house of dipak podder nh-117 to west side concrete road near the house of bimala choudhuri