A laminated structure appropriate for use in constructing walls, floors,
ceilings or doors, has a selected area and in one embodiment comprises
two external layers of one or more materials such as, but not limited to,
gypsum, at least one internal constraining layer having less than said
selected area, and two or more internal layers of a viscoelastic glue
separated by said at least one internal constraining layer, wherein each
of said layers of viscoelastic glue is patterned to cover a selected
percentage, but not all, of said area of said laminated structure thereby
to allow moisture to pass through said structure.