Transit cover for a precious object that runs without interruption from the moment it is taken down to the moment it is reinstalled, packing and transit included.
Nail-to-nail cover protects a valuable object from the instant it leaves its usual place to the instant it returns, taking in packing, crating, road, air or sea transport, intermediate storage including in customs zones, and the return path. It answers the fact that an ordinary policy ceases to have effect the moment the property leaves the designated location, creating a gap in cover precisely where risk is greatest, since most losses occur during handling rather than static display. Its real stake is the seam, the moment custody passes from one hand to another, which difference-in-conditions policies sometimes bridge.
The loan of an archive piece to a traveling exhibition is covered nail to nail, each institution insuring its segment, the lender buying a difference-in-conditions policy to bridge the gaps at the junctions.
couverture clou à clou, de mur à mur, nail-to-nail cover, wall to wall