Flashing and weep apparatus for masonry wall window and door installations

A cavity wall construction comprising:

• a support member;
• an inner wall extending upwardly from the support member and including an outer face;
• a vapor barrier substantially covering the outer race of the inner wall to inhibit moisture from penetrating into the inner wall;
• an outer wall extending upwardly from the support member, having an inner face confronting the outer face of the inner wall and being generally parallel to and spaced from the inner wall, the inner and outer walls defining a cavity there between;
• wherein the outer wall is comprised of courses of masonry components held together with mortar;
• a flashing having a first portion covering a lowermost portion of the inner wall and a second portion extending along the support member to span the cavity and underlay the outer wall, the first and second portions being generally perpendicular to each other;
• wherein the flashing is located proximate one of a window sill, a window lintel and a door lintel;
• an adhesive mastic proximate an upper edge of the first portion to adhere the flashing to the inner wall;
• a tacking strip secured to the inner wall with at least a part of the first portion of the flashing interposed between the tacking strip and the inner wall;
• a plurality of weep channels each spaced from one another, each of the weep channels extending along the second portion of the flashing toward a terminal edge thereof;
• wherein each of the weep channels is selectively re-positionable on the flashing prior to the construction of the outer wall;
• wherein each of the weep channels extends substantially along the entire first portion of the flashing and a substantial part of the second portion of the flashing;
• wherein each of the weep channels is positioned in the mortar between adjacent masonry components in a lowermost course of the outer wall;
• wherein water between the inner and outer walls escapes to the exterior of the cavity wall construction via the weep channels;
• and
• an end dam integrally formed with the flashing and positioned at a terminal end of the flashing, the end dam having a panel oriented generally perpendicularly to the first and second portions of the flashing to contain water and direct it to one of the weep channels on the flashing.

A device for use proximate an opening in a cavity wall construction having an inner wall spaced from and generally parallel to an outer wall to define a cavity there between, each wall projecting upwardly from a support member and the outer wall is comprised of courses of masonry components held together with mortar, the device comprising:

• a flashing having a first portion adapted to cover a lowermost portion of the inner wall and a second portion adapted to extend along the support member to span the cavity and underlay the outer wall;
• wherein the first and second portions of the flashing are adapted to be generally perpendicular to each other when installed on the cavity wall construction;
• and
• a plurality of weep channels each spaced from one another, each of the weep channels extending along at least part of the first portion and at least part of the second portion of the flashing toward a terminal edge thereof;
• wherein each of the weep channels is adapted to be positioned in the mortar between adjacent masonry components in a lowermost course of the outer wall;
• wherein the weep channels are adapted to transmit water between the inner and outer walls to the exterior of the cavity wall construction.

A method of constructing a cavity wall comprising the steps of:

• erecting an inner wall;
• attaching a flashing member to the inner wall proximate support member defined as one of a window sill, a window lintel and a door lintel, a first portion of the flashing member covering a lowermost portion of the inner wall adjacent the support member and a second portion of the flashing member covering the support member;
• erecting an outer wall spaced from and generally parallel to the inner wall upon the support member and the second portion of the flashing member, the outer wall comprising courses of masonry components held together with mortar;
• positioning weep channels on at least part of the first portion and at least part of the second portion of the flashing member and in the mortar between adjacent masonry components in a lowermost course of masonry components proximate the support member;
• wherein water in a cavity between the inner and outer walls is discharged from the cavity by the weep channels;
• and
• trimming an excess part of the second portion of the flashing projecting from the outer wall.