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.
Call 0495 106 195Tell 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.
Why Newcastle homes get rising damp: Newcastle's inner ring is Victorian and Federation brick — terraces through Cooks Hill and the city, workers' cottages across Wickham, Islington and Tighes Hill, and inter-war brick and tile spreading out behind them. Almost none of the pre-war stock was given a damp-proof course that still works, and a great deal of it never had one.
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.
Rising damp only affects ground-floor walls, because the moisture comes up out of the soil. If you can see these low on the wall, it is worth a proper look before it damages the plaster and the skirting.
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.
Terraces make it harder. A shared wall is shared in both directions: the damp does not stop at a title boundary, the wall dries from one face instead of two, and any treatment is a conversation with a neighbour before it is a quote. It is the single biggest practical difference between damp work here and damp work in a detached-housing city.
Salt does the damage. Groundwater carries dissolved salts up into the wall and leaves them behind as it evaporates; on the coast, from Merewether round to Stockton, more arrives on the wind. Those crystals expand as they form, and that is what crumbles mortar and takes the face off a brick. The water moves the salt — the salt breaks the wall.
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.
A large share of what gets sold as rising damp treatment in this city is a drainage job wearing a damp course's clothes.
If the wet patch sits at the height of the ground outside rather than near the floor, the water is not rising. It is being pushed through.
Water moves the salt. The salt breaks the wall. Treat one without the other and the wall comes back.
Most trades will not publish a price. Here are the ranges, and what moves you within them.
The order matters. Injecting a damp course into a wall whose real problem is a cracked footing is money spent on the wrong thing, which is why the assessment comes first and the quote comes after.
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.
Rising damp, lateral damp through a cut-in wall, a leak, condensation, or what a creek flood left behind. On a Newcastle wall all five leave a mark near the floor and only one needs a damp course.
Ground above the damp course is the fix, not a second damp course below it. Injecting under a bridge changes nothing and you will have paid for it.
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.
Salt left in the render pulls moisture out of the air on its own. A wall with a perfect new course and its old plaster still reads damp, and the owner assumes the course failed.
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.
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.
Practically, both of yours. Moisture does not stop at a title boundary and a party wall dries from one face instead of two. The assessment covers the wall; the conversation with your neighbour usually has to happen before any work starts. It is the most common complication in Cooks Hill and the city terraces.
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.
Building work in New South Wales is licensed through NSW Fair Trading, and we only refer specialists holding the appropriate licence. Ask to see it — a legitimate operator will not mind.
The physical work is usually a few days. The wall then dries for months. Any finish applied before it has dried will fail, which is why the sequence matters more than the speed.
We arrange assessments across Newcastle and the lower Hunter, including:
Rising Damp Newcastle