Wollongong and the broader Illawarra region sit in one of NSW's highest-risk zones for termite activity. The warm, humid coastal climate and surrounding eucalyptus forest create near-ideal conditions for Coptotermes acinaciformis — Australia's most destructive termite species. Yet most homeowners only discover termites once visible damage has already occurred, by which point the colony has typically been active for 12 to 18 months.
The good news: termites do leave signs. You just need to know what to look for. Here are the five most common warning signs found in Wollongong properties.
1. Mud Tubes on Foundations or Walls
Termites build pencil-width earthen tubes from the soil to the timber they're feeding on. These tubes protect them from light and moisture loss. You'll often find them running along the outside of your foundation, brick piers, concrete walls, or along timber beams in the subfloor. They look like thin brown streaks and are one of the clearest visible signs of subterranean termite activity.
Where to check: External foundation walls, internal subfloor piers and bearers (if you have a subfloor), and the exterior of any exposed brick or concrete walls below the floor line.
2. Hollow-Sounding Timber
Termites eat timber from the inside out, leaving only a thin external shell. Tap your skirting boards, door frames, window sills, and floorboards with your knuckle. Solid timber produces a dull thud — termite-damaged timber produces a hollow, papery sound. This is one of the most reliable DIY checks you can do.
In older Wollongong homes with hardwood floors or original timber window frames, this sign can reveal significant structural damage that isn't visible to the eye.
3. Blistering or Bubbling Paint
Moisture from termite workings builds up inside wall cavities and causes paint or wallpaper to blister, bubble, or peel — similar in appearance to water damage. Many Wollongong homeowners dismiss this as a plumbing issue or humidity problem without checking for the underlying cause.
If you see paint blistering in an area where there's no obvious water source, particularly on internal walls, treat it as a potential termite indicator until ruled out.
4. Discarded Wings Near Windows or Doors
When a termite colony is mature and conditions are right — typically in spring and after rain — it releases winged reproductives called alates, or "swarmers." These fly out to establish new colonies, then shed their wings almost immediately. Finding a pile of small, translucent wings near a windowsill, door frame, or light fitting is a strong sign that a termite colony has recently swarmed near or inside your home.
In Wollongong, swarming typically occurs between October and January. If you see discarded wings, contact a pest inspector promptly — the new colony, if established in your home, will have a 12-month head start before most homeowners notice anything else.
5. Tight-Fitting Doors or Windows
As termites damage the structural timber in door frames and window frames, the timber warps and distorts. Doors and windows that previously opened smoothly may become stiff, tight-fitting, or hard to close. This symptom is often attributed to seasonal swelling or building movement, but in a Wollongong home with no recent wet weather, it's worth investigating.
What to Do If You Spot Any of These Signs
The most important rule: do not disturb the area. Don't break open walls, spray the area with insecticide, or attempt any DIY treatment. Disturbing an active termite colony causes them to scatter deeper into the structure, making treatment significantly more difficult and expensive.
Call a licensed pest inspector immediately. A professional termite inspection covers all accessible areas of your property — subfloor, roof void, interior walls, and exterior perimeter — using moisture meters to detect hidden activity. Australian Standard AS 3660 recommends annual inspections for all properties in high-risk areas like Wollongong.
South Coast Pest Control provides termite inspections across Wollongong and the Illawarra with a full written report provided same day. If you've noticed any of the above signs, call us on 0425 232 461 for an urgent inspection.