Water tight seal for corner joints, and associated mouldings

A method of sealing together a generally horizontal structure and a finishing layer of a generally vertical structure upstanding therefrom at a corner joint between said structures, the method comprising:

• (a) obtaining a moulding having a longitudinal dimension and a cross-sectional shape that is defined in planes perpendicular to said longitudinal dimension and that comprises a rectangular base portion and a cap portion integrally attached to an end of the rectangular portion, the cap defining an upper lip at a height above a topside of the rectangular portion and a lower lip jutting downwardly past an underside of the rectangular portion and the rectangular portion having double sided foam tape adhered to the underside of said rectangular portion;
• (b) applying a bead of caulking in along an inner face of the cap portion below the upper lip thereof;
• (c) inserting the rectangular portion of the moulding into a gap between the horizontal structure and the finishing layer of the vertical structure at the corner joint, leaving the cap portion outside said gap with the inner face of the cap portion facing the generally vertical structure;
• and
• (d) forcing the moulding downwardly to adhesively secure the underside of the rectangular portion of the moulding to an upper surface of the generally horizontal structure via the double sided foam tape in a position with the rectangular portion inserted far enough into the gap such that the upper lip of the cap portion is placed in contact against an outer surface of the finishing layer of the generally vertical structure, the lower lip is placed in contact against an upper surface of the generally horizontal structure, and the bead of caulking is sandwiched between the inner face of the moulding and the outer surface of the finishing layer of the generally vertical structure.