This is a serious problem as you’re only seeing a small part of the black mold, as I’m fairly certain there is a lot more mold inside the wall. The plumbing is between sheet rocked bedroom and exterior brick wall. A few weeks ago, a horrible nor’easter caused water to leak over her basement wall. Allow me to explain the dynamics of brick walls, brick veneer and rain, and you’ll be able to do a fantastic job of protecting everything behind the brick. You can test for seepage or condensation by adhering a small piece of aluminum foil to the wall. Sara lives in a brick … Moisture is one of the most difficult issues to detect in a building - the signs are subtle and easy to miss until water starts dripping from the ceiling. https://gosmartbricks.com/wall-leakage-7-common-causes-of-brick-leaks "Over time, even the most watertight brick walls are going to leak, so let's assume they will and design for it," says Brian E. Trimble, PE, director of engineering services and architectural outreach with the Brick Industry Association. Opening Weep Holes in Masonry Walls. AD Brick walls leak water. What is best way to attack this? This is because the weep holes are poorly spaced or debris have stopped weep hole to function properly. Occasionally, water within brick masonry wall does not have proper drain path and consequently remain inside the wall. One other sign of a shower leak behind the wall is the drywall/tile in front of the valve becomes spongy. She described it as a miniature Niagara Falls. There is a small risk that the grapefruit-sized holes in your sheathing may allow wind-driven rain to enter your walls -- but that risk is quite small, because when rain runs down the cavity behind brick veneer, the water usually clings to the bricks, not the sheathing. Seepage can cause serious leaks or compromise the strength of the mortar that binds the concrete blocks whereas condensation often causes surface damage to block walls or encourages the growth of dangerous mold. 2. Fig.5: Ivy on Surface of Brick Masonry Wall. An outside faucet pipe on front porch is leaking behind brick wall somewhere. Determine Where Your Shower Is Leaking. Brick walls leak by nature. If your shower leaks behind wall, most times you can’t tell from the front side of the shower. Water coming in to the basement from over the top of the foundation can be from improperly installed or damaged thru-the-wall brick flashing and of course a leaking brick wall. Hot Water Pipe - leaks shows as a warm area . The water is seeping out under brick onto the porch, but is not leaking into the bedroom. 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