Finding damp under your window sill is a common but frustrating household issue that can lead to peeling paint, bubbling plaster, and harmful mold growth. Whether you are seeing dark patches on the wall or feeling a soft, "spongy" texture on wooden sills, identifying the root cause is the first step toward a permanent fix.
It’s not just "a bit of water." It’s penetrating damp. 💧
We tackled this [this week/today] by: ✅ Raking out the old, failed pointing. ✅ Applying a flexible, weather-proof sealant. ✅ Treating the internal stain with a damp-blocking primer. damp under window sill
Every spring, walk around your house with a caulk gun and a flashlight. Check under every window sill. If you see a hairline crack, seal it that day . Clean weep holes. Trim back any plants touching the sill.
If you’ve done all the above and the damp returns within a month, or you see a white, fluffy salt deposit (efflorescence) on the sill, your problem is structural. Likely causes: Finding damp under your window sill is a
Spotted discolouration, peeling paint, or black mould under your window sill? It’s easy to ignore, but "damp under the sill" is one of the most common red flags in a home.
This style is educational and encourages people to check their own homes. 💧 We tackled this [this week/today] by: ✅
Usually caused by a gap in the external sealant or a crack in the render. If you ignore it, the plaster crumbles and the mould spreads.
We see this all the time: damp patches appearing directly under the window sill.
Water finds the path of least resistance. A tiny, invisible gap under a sill can pour a bathtub of water into your wall over a single winter. Act now, and you’ll sleep dry.
Finding damp under your window sill is a common but frustrating household issue that can lead to peeling paint, bubbling plaster, and harmful mold growth. Whether you are seeing dark patches on the wall or feeling a soft, "spongy" texture on wooden sills, identifying the root cause is the first step toward a permanent fix.
It’s not just "a bit of water." It’s penetrating damp. 💧
We tackled this [this week/today] by: ✅ Raking out the old, failed pointing. ✅ Applying a flexible, weather-proof sealant. ✅ Treating the internal stain with a damp-blocking primer.
Every spring, walk around your house with a caulk gun and a flashlight. Check under every window sill. If you see a hairline crack, seal it that day . Clean weep holes. Trim back any plants touching the sill.
If you’ve done all the above and the damp returns within a month, or you see a white, fluffy salt deposit (efflorescence) on the sill, your problem is structural. Likely causes:
Spotted discolouration, peeling paint, or black mould under your window sill? It’s easy to ignore, but "damp under the sill" is one of the most common red flags in a home.
This style is educational and encourages people to check their own homes.
Usually caused by a gap in the external sealant or a crack in the render. If you ignore it, the plaster crumbles and the mould spreads.
We see this all the time: damp patches appearing directly under the window sill.
Water finds the path of least resistance. A tiny, invisible gap under a sill can pour a bathtub of water into your wall over a single winter. Act now, and you’ll sleep dry.