10 Signs of Rising Damp — With Photos From Real SA Homes

Not sure if it's rising damp, penetrating damp or condensation? The 10 visual signs we see most often on East Rand jobs — and what each one tells you.

Every damp problem looks similar at a glance — but the fix is completely different depending on the cause. Here are the ten signs we see most often, and what each one is actually telling you.

1. Tide-mark up to 1 metre off the floor

Classic rising damp. Moisture climbs by capillary action until gravity wins at around 1 m. If your stain stops at ceiling height instead, it's penetrating damp from the roof.

2. White salt crystals along the skirting

Efflorescence — ground salts brought up by the moisture and deposited as the water evaporates. Confirms rising damp, not condensation.

3. Paint bubbling from the bottom up

Rising damp pushes paint off from behind. Condensation-driven paint failure starts higher up and usually near cold spots.

4. Skirting boards rotting or springy underfoot

Wood in contact with damp brick fails first. Often the earliest sign, even before the wall discolours.

5. Musty smell that never quite goes away

Mould spores and damp brick releasing volatile compounds. Worst in winter when windows are closed.

6. Cold, clammy patches on the wall

The wet section of wall is 3–5 °C colder than the dry section. Easy to feel with the back of your hand.

7. Black mould in corners at floor level

Combination of rising damp + poor ventilation. See our mould removal guide.

8. Wallpaper lifting at the bottom edge

Adhesive fails under sustained moisture. Same cause as bubbling paint.

9. Rust marks under electrical socket plates

Damp brick corrodes the socket back-box. Also a fire risk — get it checked.

10. Efflorescence on external walls after rain

White powdery bloom on the outside of the wall after wet weather. Confirms the wall is porous and needs treatment.

See any of these? Here's what to do

WhatsApp 064 508 6253 with a clear photo and we'll tell you honestly if it's rising damp, penetrating damp or condensation — and whether DIY or professional makes more sense. Or start with our DIY damp proofing kits.