By ignorance and believing to do well, some owners decide to caulk the chantepleures practiced in the masonry walls. They do not know that the chantepleure is a hollow masonry joint (drain hole) that does not contain mortar, in order to encourage the flow of water that seeps behind the masonry.
In order to understand the role of chantepleures in a hollow wall, one must know the components of this wall. Thus, the latter is composed of a masonry cladding and a wooden structure. This wall has two membranes to protect against the penetration of rain, an external and internal protection.
Exterior protection includes masonry assembly (bricks or stones and mortar joints, flashing and grouting joints), while interior protection is provided by the liner membrane.