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 Islington, 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.
Islington's tight grid of pre-war cottages has been subdivided and rebuilt around, and the common cause here is drainage from a newer building next door running against an old wall that was never designed to be wet. Where two eras of house sit half a metre apart, the older one takes the water.
Islington is cottages and modest terraces of the same working era as Wickham, and the same construction: solid brick, timber floors, shallow subfloors. Many have been renovated hard in the last two decades, and the renovation is often what introduced the problem — a new bathroom slab poured up against an old external wall, or a rear addition whose finished floor sits above the original damp course.
Styx Creek runs through this part of Newcastle and its catchment is largely paved, so rainfall arrives fast and leaves slowly. Ground here can stay charged for days after a storm that looked unremarkable at the time. Damp that only appears in the wet months, and only on the wall nearest the creek side of the house, is the pattern to watch for.
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 Islington, 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.
Prices assume ground-floor work on an accessible wall. Heritage listing, a party wall, or a floor that has to come up will all move the number, and each is common in exactly the suburbs where the damp is worst. You get a fixed figure after someone has looked.
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.
An assessment with a written finding is $450 plus GST. Injecting a new damp course runs about $170 to $330 a metre. Replastering a salty wall is about $120 to $260 a square metre. Sometimes the answer is only drainage or ground levels, which can cost less than any of that. Every fixed price quote follows an on-site assessment.
The physical work is usually a few days. The drying is the long part. A wall dries at roughly one month for every ten millimetres of thickness. A double brick wall can take most of a year before it is ready to paint. Finishing early undoes the work.
Usually not. Australian home policies commonly exclude gradual damage, wear and tear and lack of maintenance, and rising damp falls into that group. A sudden event is treated differently — a burst pipe, for example, is often covered. Read your own policy wording, and ask your insurer before you assume either way.
You can buy an injection kit. Home attempts usually fail for one of two reasons. Either the diagnosis was wrong and the wall never had rising damp. Or the salt already in the wall was left there, so the mark comes back through the new plaster. The chemical is the cheap part of the job.
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