The plumbing is between sheet rocked bedroom and exterior brick wall. Occasionally, water within brick masonry wall does not have proper drain path and consequently remain inside the wall. https://turnbullmasonry.com/can-cause-water-damage-behind-brick-wall Sara lives in a brick … If your shower leaks behind wall, most times you can’t tell from the front side of the shower. Hot Water Pipe - leaks shows as a warm area . Determine Where Your Shower Is Leaking. You can test for seepage or condensation by adhering a small piece of aluminum foil to the wall. One other sign of a shower leak behind the wall is the drywall/tile in front of the valve becomes spongy. Opening Weep Holes in Masonry Walls. 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. 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. Flooding - water wicking up a wall into the insulation and up wall studs . An outside faucet pipe on front porch is leaking behind brick wall somewhere. 2. Repairing the holes with rigid foam and canned spray foam seems adequate to me. Water penetration also provides the moisture that mold needs to grow on susceptible wall elements. The problem then would be the mortar between the bricks is failing and water is getting behind the brick, absorbed by the insulation and the drywall opposite the brick. A few weeks ago, a horrible nor’easter caused water to leak over her basement wall. Fig.5: Ivy on Surface of Brick Masonry Wall. Brick walls leak by nature. This is usually cause by water spraying from the leak in back of the wall. 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. 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. This is because the weep holes are poorly spaced or debris have stopped weep hole to function properly. https://www.askthebuilder.com/water-leaks-brick-wall-heavy-rain She described it as a miniature Niagara Falls. https://gosmartbricks.com/wall-leakage-7-common-causes-of-brick-leaks AD Brick walls leak water. The water is seeping out under brick onto the porch, but is not leaking into the bedroom. "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. 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