Rising Damp Newcastle connects Newcastle homeowners with independent damp specialists. A salt bloom on the wall. Paint lifting above the skirting. A tide mark about a metre up. We arrange a full assessment that works out what is really happening, before anyone quotes to fix it.
Talk it throughTell us what the wall is doing.
We connect Newcastle property owners with independent damp specialists holding the appropriate NSW Fair Trading licence.
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. Across much of Newcastle that means mine subsidence. That may be compensable, and it 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. Much of it falls in short heavy bursts. East coast lows and summer storms drop more in a few hours than the drains were built to carry. Water arriving that fast does not soak in evenly. It runs off, and it ponds against whatever is in its way. It then sits in the soil around and under the footings for weeks, long 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.
Everything we get asked, in one place. If your question is not here, ring and ask it.
An inspection works out which problem you actually have. Most of them are cheaper to fix than the one everyone assumes.
There is no licence called damp proofing. The one that matters is waterproofing, and it is worth two minutes to check.
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.
Does the crack through your brickwork step down the mortar joints? That points at ground movement, not moisture. It also changes who you should be ringing.
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. One wall can cost several times what another does. The thickness, the access and how much salt is already in it all change the price.
| Work | Indicative range | What it covers |
|---|---|---|
| On-site assessment and written diagnosis | $450 plus GST | 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. Every fixed price quote follows an on-site assessment.
Rising damp only happens on ground-floor walls, and it makes an even horizontal line about 600mm to 1.2m up. A leak makes a patch, usually higher, and usually worst after rain. Condensation shows up on cold surfaces and in corners, and it is worst in winter. A moisture meter and a look outside settle it in about an hour. Guessing is what costs people money.
A damp course is a waterproof layer built into a wall, just above the ground. It stops water climbing any higher. Older Newcastle houses were built with slate, lead or bitumen. Newer ones use plastic. A damp course can fail with age, or be bridged, which means water found a way around it.
Yes. The most common cause in a newer house is that the ground outside has ended up higher than the damp course. A concrete path, a garden bed, a slab or a re-levelled yard will do it. The water walks around the barrier. This is usually the cheapest kind to fix, because the fix is outside the house.
Damp walls grow mould. NSW Health says mould and damp indoors are linked to coughing, wheezing and asthma symptoms. It affects children, older people and people with asthma the most. Cleaning mould off the surface does not fix it while the wall is still wet.
Tell us what the wall is doing. Tell us what the wall is doing and roughly when it started. There is no obligation.
We connect Newcastle property owners with independent damp specialists holding the appropriate NSW Fair Trading licence.
We arrange assessments across Newcastle and the lower Hunter, including:
Rising Damp Newcastle