Rising Damp Newcastle connects owners of Newcastle's terraces, cottages and pre-war brick with independent damp specialists. We work out what is actually happening to the wall before anyone quotes to fix it.
Talk it throughTell us what the wall is doing.
Rising Damp Newcastle is a lead referral service. We connect Newcastle property owners with independent damp specialists holding the appropriate NSW Fair Trading licence. We do not carry out the work ourselves.
Rising Damp Newcastle arranges damp assessments across Newcastle and the Hunter. This page is about rising damp in The Junction, NSW.
An even horizontal line, roughly 600mm to 1.2m above the floor, on a ground-floor wall. It marks where the water stops climbing and starts evaporating. Condensation does not produce a level line like this.
Salts left behind as the water evaporates. Brushing it off works until the next wet spell.
Almost always a non-breathable coating over a wall that needs to dry outward. The coating is not failing — it is working, in the wrong place.
Salt crystallisation forcing the surface apart. Worst on the coastal strip and usually well advanced before anyone calls it damp.
Not damp. That pattern points at ground movement, and across much of Newcastle that means mine subsidence — which may be compensable, and which needs a different call entirely.
Flash flooding out of the creek catchments charges the ground for weeks. Flood-legacy damp is saltier and more destructive than the everyday kind, and it surfaces months later.
The Junction sits on the slope between Merewether and the city, which produces two different problems on one street. Houses cut into the rise take lateral damp through the uphill wall where soil is retained against it; the ones below take true rising damp where a raised garden bed or a newer path has bridged the original course. It has also been renovated hard, and non-breathable render over old brick is the single most common thing that turns a slow problem fast.
The Junction runs to Federation and interwar brick on generous blocks, much of it double-brick with cavity walls and a slate or bituminous damp course near the base. That construction is durable and it is also why damp here is so often misdiagnosed: a cavity wall can carry water across on mortar droppings left in the cavity during construction, producing a damp patch that behaves nothing like textbook rising damp.
This is one of the more heavily renovated pockets of Newcastle, and renovation is the usual culprit. New alfresco slabs, raised decks, rendered garden walls returning into the house and reticulated garden beds all put water where the original builder did not expect it. When a Junction house that was dry for eighty years goes damp, the question is nearly always what changed outside in the last ten.
Newcastle gets a little over 1,100mm of rain a year, and it does not arrive politely. A large share of it falls in intense bursts — east coast lows and summer storms that drop more in a few hours than the drainage was ever built to carry. Water that arrives that fast does not soak in evenly. It runs, it ponds against whatever stands in its way, and it charges the soil around and under footings for weeks after the street looks dry.
Readings up the wall, then outside: levels, the rear lane, paving, downpipes, and whatever render or paint is already stopping the wall breathing.
Stepped cracking points at ground movement, not moisture. In a Mine Subsidence District that is a different call and possibly a compensable one.
Injected into one mortar course, sized to the wall thickness. A shared wall is drilled from one side only, so the spacing tightens and the day gets longer.
Roughly a month per ten millimetres of wall thickness. Double brick means most of a year before it is ready to paint, and painting early undoes the work.
The full sequence, and why the order matters in The Junction, is set out on our how it works page.
Rising damp is groundwater climbing a wall. Everything else — the salt, the lifting paint, the smell — follows from that one fact.
The job of an inspection is to work out which of several problems you have — because most of them are cheaper to fix than the one everyone assumes.
A chemical course is a barrier injected into the mortar line. It is right when there is no working damp course, and wrong when there is one that has been buried.
If the crack through your brickwork steps down the mortar joints, you may be looking at ground movement rather than moisture — and that changes who you should be ringing.
A shared wall is shared in both directions. It is the single biggest practical difference between damp work in Newcastle and damp work in a detached-housing city.
Newcastle floods two different ways, and they leave different problems behind. Neither is what most people picture when they hear the word flood.
The figures below are Newcastle figures, not a national average. A shared terrace wall costs more than a detached one — access is tighter, the wall dries from one side, and the work usually needs coordinating with next door. Any wall carrying years of salt also needs the render taken back and replaced with something breathable, and that replastering is often the larger half of the bill.
These are the ranges we see quoted around Newcastle. They are wide on purpose. A single-skin cottage wall in Lambton and a double-brick party wall in Cooks Hill are the same line on this table and nowhere near the same job.
| Work | Indicative range | What it covers |
|---|---|---|
| Assessment and moisture survey | $250 - $450 | Readings taken at intervals up each affected wall, an external check of levels, lanes and downpipes, and a written finding. Where there is cracking it also says whether you should be calling Subsidence Advisory NSW instead. |
| Chemical damp-proof course, per metre | $170 - $330 | Injected into the mortar course. A shared terrace wall sits at the upper end because of access and because it can only be worked from one side. |
| Salt-retarding replaster, per square metre | $120 - $260 | Contaminated render off, breathable system on. Near the water this is rarely optional — the southerly loads the wall with salt from outside while the damp loads it from within. |
| Drainage and ground-level correction | $900 - $6,000 | Dropping a path, cutting a bed back, taking a downpipe away from the wall. On the terraces this often means the rear lane, where decades of resurfacing have raised the ground against the back wall. |
| Subfloor ventilation improvement | $1,200 - $4,500 | For the timber-floored cottages, where a closed subfloor holds moisture under the house. |
Prices are indicative ranges only. A terrace with a shared wall, a heritage-listed facade and an ordinary inter-war cottage all cost differently to treat, and every fixed price follows an on-site assessment.
No. Stepped cracking through brickwork points at ground movement. Across much of Newcastle that can mean mine subsidence, and subsidence damage may be compensable through Subsidence Advisory NSW. Rising damp does not crack a wall in that pattern — but a crack does let water in, so the two often turn up together.
Yes, and it lasts longer than people expect. Flash flooding out of the Throsby, Styx and Cottage Creek catchments charges the soil around footings for weeks. Floodwater also carries salts into the wall, so flood-legacy damp is saltier and more destructive than the everyday kind and often surfaces months later.
Yes, and New Lambton and Adamstown are full of examples. Double brick laid before the war frequently has no serviceable damp course, and a path poured against the wall decades later does the rest. Not being a period terrace is not protection.
You can buy the kit. It usually fails because the diagnosis was wrong, or the salt already in the wall was never removed, so the tide-mark comes back through the new plaster. The chemical is the cheap part.
Tell us what the wall is doing. Tell us what the wall is doing and roughly when it started. The call is free and there is no obligation.
Rising Damp Newcastle is a lead referral service. We connect Newcastle property owners with independent damp specialists holding the appropriate NSW Fair Trading licence. We do not carry out the work ourselves.
We arrange assessments across Newcastle and the lower Hunter, including:
Rising Damp Newcastle