Masonry Magazine December 1996 Page. 27
INSTALLATION OVER WALL OPENINGS
FLASHING MEMBRANE
NAILED THROUGH
SHEATHING TO
FRAME BACKUP
Fig. 1
FLASHING MEMBRANE
EXTENDED BEYOND
EXTERIOR FACE
OF BUILDING
WATER
RESISTANT
BUILDING
PAPER
PREFORMED
END DAM
BUILDING PAPER
Installation Over Wall Openings
FLASHING MEMBRANE
NAILED THROUGH
SHEATHING TO
FRAME BACKUP
If not properly flashed, all masonry wall openings possess a potential moisture problem. In brick veneer systems there are two distinct methods for properly installing the flashing membrane, as shown in Figures 1 & 2. In Figure 1 the flashing membrane" is turned up at the ends and placed inside the head joint, forming a dam. This acts as a directional aid, guiding water through the weep holes to the exterior surface of the wall. In Figure 2 a self adhesive preformed end dam is placed under the flashing membrane (shown on top of flashing in the drawing for clarity). Figures 3 & 4 show the complex detail required to properly flash a brick veneer bay window. Preformed end dams are used in a stair-step fashion, culminating with a flashing tray and weep hole to direct collected water FASHING FOCIET out of harms way. Preformed self-adhesive corners are also available for baseflashing as shown in Figure
FLASHING MEMBRANE
EXTENDED BEYOND
EXTERIOR FACE
OF BUILDING
COUNTER FLASHING
WATER
RESISTANT
BUILDING
PAPER
PREFORMED
END DAM
Fig. 2
CONTINUOUS FLASHING
WITH OPEN ENDS
ONTINUOUS
ASHING WITH
EN END
Fig. 3
FLASHING TRAY
WITH WEEP HOLE
Fig. 5.
INSTALL FLASHING EVERY
OTHER COURSE BY TURNING
ENDS TO FORM DAM
INSULATED
SHEATHING
Fig. 4
STRUCTURAL
TEE
Preformed
inside and
outside comers
Fig. 5
MASONRY-NOVEMBER/DECEMBER, 1996 27
FLASH
POCKE