What is causing my window to leak?
Capillary action is the culprit in this case. Capillary action will allow water to cling to the underside of the brick, as it flows toward the window. To prove this theory, the next time it rains and leaks, go outside and see if you have moisture clinging, and moving to the underside, top of the window opening. windows normally have a drip edge installed at the top to prevent capillary action, but is commonly omitted with a brick exterior. Capillary action can be prevented by blocking the flow toward the window. Even a bead of caulk to make the water turn downward before flowing to the window frame will work. The water will not be able to use the capillary action because it cant flow up the other side of the caulk, and must drip. Brick is usually laid with drip, or weep holes along the base to allow any water that penetrates the wall from above to drain out. These days, brick layers use a rope type wick at the bottom layer allowing moisture to escape, but preventing bugs entry behind t
