The short answer
Common Causes of Interior Brick Leaks
Water finds its way through brick in several ways. Cracks in the mortar joints or in the bricks themselves let rain seep through. Over time, mortar can crumble, leaving gaps that allow moisture to travel inward.
Failed flashing, the metal or rubber barrier that directs water away from openings, is another frequent culprit. Windows, doors, and roof intersections rely on flashing to keep water out. If it is damaged or missing, water can run behind the brick and appear inside your home.
- Cracked or spalling bricks
- Deteriorated mortar joints
- Missing or damaged flashing
- Clogged gutters causing overflow
- Poorly sealed windows or doors
- High ground level against the wall
How Water Travels Through Brick
Brick is porous, so it absorbs water like a sponge. When rain saturates the exterior, moisture can slowly migrate through the brick and mortar to the interior surface. This is especially likely during heavy, wind-driven rain.
The wall cavity behind the brick can also collect water if the drainage system fails. Weep holes, designed to let water escape, can become blocked. If water pools in the cavity, it will eventually find a way into your living space.
Signs of a Leaking Brick Wall
Look for damp patches on interior walls, especially after rain. Paint may bubble, peel, or darken. You might also notice efflorescence, a white chalky residue left by minerals in water, on the brick or interior surface.
A musty odor or the presence of mold near the wall is another warning sign. Wood trim or framing that feels soft or looks stained indicates prolonged moisture. Catching these signs early helps prevent more extensive damage.
What to Do When You Spot a Leak
Act quickly to minimize damage. Move furniture and belongings away from the affected wall. Place a bucket or tarp to catch dripping water. If possible, reduce the water pressure by clearing gutters or diverting downspouts away from the wall.
Dry the area with fans and dehumidifiers to slow mold growth. Avoid disturbing the wall if you suspect electrical hazards. For significant water intrusion, local water damage pros can assess the extent and begin drying procedures.
When to Call the Pros
If the leak is large, persistent, or you cannot locate the source, it is time to call local water damage pros. They have moisture meters and thermal imaging tools to find hidden water. They can also dry wall cavities properly to prevent mold.
For brick issues, a mason may be needed to repoint mortar or replace damaged bricks. If the roof is involved, a roofer can inspect flashing and shingles. Your insurance company can help if the damage is covered; policies vary, and your insurer decides what is covered.
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Water keeps spreading into floors and walls, so it is worth acting early. Calls are answered 24/7.
Call Now (386) 272-5697Frequently asked questions
Can a small crack in brick cause a leak?
Yes. Even a hairline crack in brick or mortar can let water enter, especially during heavy rain. Water expands when it freezes, which can widen cracks over time. Sealing small cracks with caulk or mortar can help, but larger issues may need professional repair.
Is interior water always from the brick itself?
Not always. Water inside could come from a roof leak, a plumbing pipe, or condensation. Check the ceiling and nearby fixtures. If the leak appears only after rain, brick or roof issues are likely. A water damage inspection can pinpoint the source.
How long does drying take after a brick leak?
Drying time depends on how much water soaked into the wall and the materials involved. Porous brick and wood framing can hold moisture for days. Professional drying equipment speeds the process, but full drying may take several days to a week.