Rising Damp Ipswich assesses and treats damp in older Ipswich homes. We start by working out whether what you have is actually rising damp — in this city it can be condensation, a drainage fault, or a room that was built in underneath a Queenslander without a damp course.
Tell us what the wall is doing.
No obligation. We ring you back to talk through the job.
Three things decide it, and none of them can be judged from a photograph.
Before 1900 there is often no damp course at all. Between the wars there is usually a bitumen one that has aged out. On a modern slab there is a membrane and rising damp is not the mechanism.
On a Queenslander this is almost the whole question. The timber house on stumps, clear of the ground, does not take rising damp. The block room added at ground level in 1985 can.
A garden bed, a path or a driveway sitting above the damp course carries water straight past it. Lowering the ground is often cheaper than any treatment.
That is what the assessment is for, and it is the cheapest step.
Why Ipswich homes get rising damp: Ipswich is the oldest provincial city in Queensland, and it has the housing to prove it. The centre and the older suburbs carry solid masonry from the 1860s onward, built before the damp proof course was standard practice and in many cases built without one at all. A solid wall is a single continuous path from the footing to the plaster, so whatever is in the ground has a route all the way up.
Ipswich has a humid subtropical climate with most of its rain arriving between November and March, often in heavy falls rather than steady drizzle. That pattern matters for damp in two ways. Ground that is saturated repeatedly through a wet summer keeps a wall wet long enough for water to climb it, and the same humidity produces condensation on cool internal surfaces through the cooler months. The two look alike to an owner and behave completely differently. A wall that is worst in February and improves by August is behaving like ground water. A wall that is worst on cold mornings, in a bathroom or a closed-up room, is probably not.
Ipswich has two damp seasons, and they are not the same problem. The table is the Bureau of Meteorology long-term average for Amberley, the nearest long-record station.
| Month | Rain | Days of rain (1 mm or more) | Overnight low | 9am humidity | 3pm humidity |
|---|---|---|---|---|---|
| January | 116.6 mm | 8.1 | 19.7 °C | 67% | 51% |
| February | 121.6 mm | 8.2 | 19.5 °C | 70% | 54% |
| March | 90.6 mm | 8.2 | 17.9 °C | 71% | 52% |
| May | 55.5 mm | 5.4 | 10.0 °C | 76% | 48% |
| June | 44.5 mm | 4.2 | 7.0 °C | 77% | 46% |
| July | 37.3 mm | 4.2 | 5.4 °C | 74% | 42% |
| August | 27.4 mm | 3.7 | 6.2 °C | 68% | 38% |
| September | 32.6 mm | 4.0 | 9.5 °C | 62% | 38% |
| December | 119.8 mm | 8.2 | 18.4 °C | 63% | 49% |
Source: Bureau of Meteorology, Amberley AMO, station 040004, records from 1941. Annual rainfall 873.7 mm on 73 days of 1 mm or more. Read on 14 October 2026.
What we read from it. November to March brings 533 mm, about 61 per cent of the year, so the ground against a wall is wettest from late summer into autumn. That is when rising damp is at its worst. Winter is different. In May and June the 9am humidity is 76 to 77 per cent, the highest of the year, and July nights average 5.4 °C. Cold walls and damp morning air are the conditions for condensation, not rising damp. August and September have the driest afternoons, at 38 per cent. A wall fed from the ground should look better by then, and a mark that is worst on winter mornings points to condensation. That is why we ask whether the wall is worse in February or in August.
Rising damp only affects ground floor walls, because the water comes up out of the soil. If you can see any of these low on a wall, get a full assessment. We take moisture readings inside and out, check the ground levels around the house, and put the cause in writing — before the plaster and the skirtings are damaged, and before we quote a repair.
An even horizontal line, usually somewhere between 600mm and 1.2m above the floor, on a ground floor wall. It marks the height where water stops climbing because it evaporates as fast as it arrives. Condensation and leaks do not draw a level line.
Salt left behind when the water evaporates out of the wall. It can look like a dusty white fur, or like crystals in the mortar joints. It often looks worse in a dry week, which confuses people, because dry weather is when the evaporation is fastest.
Not a bubble in one spot but a strip of blistering that follows the same height along the wall. Modern acrylic paint on an old solid wall traps water behind it, so the paint lets go before the plaster does.
Timber in contact with a damp wall swells, then rots from the back. A skirting that gives under a thumbnail while the face still looks sound is a good early sign, and it is an easy one to paint over rather than investigate.
Particularly in a room that has been built in underneath, or a front room that gets no sun. The smell often arrives before the staining does, so it can be the first sign you notice.
The ceiling is dry, the top of the wall is dry, and the damage is all in the first metre. That distribution is the strongest single indicator that water is arriving from below rather than from a roof, a gutter or a pipe.
In Ipswich the honest first answer can be no. Condensation, a shower leak, a failed downpipe and reactive clay all produce a wet wall, and none of them is rising damp.
On a Queenslander this is the whole question. The original house is on stumps and dry; the room added at ground level is where the water is getting in.
The internal readings say how high and how wet. The external check says why — ground levels, paving, garden beds, downpipes, and render that stops the wall drying.
Remove contaminated render, let the wall dry, and finish in a breathable system. Skipping this step is why a damp repair can come back looking like a failure.
The full sequence is set out on our how rising damp works page.
A Queenslander on stumps, with air under it and nothing touching the frame, does not take rising damp in its timber walls. The room somebody built in underneath it can, and it may have no damp proof course in it.
Flood salt sits at the flood height for years and needs no ongoing water to keep looking terrible. A damp course will not touch it, and that question comes first.
We work out which cause fits before anybody drives to you. Several of them are cheaper than rising damp and worth ruling out first.
Indicative ranges for damp work in Ipswich, so you can sanity-check a quote before you accept it. Every fixed price follows an on-site assessment, because the two things that drive the cost — wall construction and how much render has to come off — cannot be judged from a photograph.
| 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 ground levels, paving, downpipes and any built-in-under work, and a written finding. Where there is cracking it also says plainly whether what you need is a damp specialist or a structural engineer. |
| Chemical damp proof course, injected | $180 to $320 per linear metre | Drilling and injecting a cream or fluid barrier into the mortar course, then making good. The range depends on wall thickness, whether it is single or double skin, and access. A solid nineteenth century wall costs more than an interwar cavity wall. |
| Salt-affected render removal and replacement | $120 to $260 per square metre | Taking off contaminated render and plaster, allowing the wall to dry, then re-rendering in a system that lets the wall breathe. This can be the larger half of the bill and the half people do not expect. |
| Subfloor ventilation to a Queenslander or built-in-under room | $1,800 to $4,500 | Additional vents, or powered extraction where the underfloor cannot be ventilated passively. Often the entire answer on a timber house, where no damp course is involved at all. |
| Drainage and ground level correction | $900 to $6,000 | Lowering garden beds and paving away from the wall, correcting falls, and taking downpipes into a line rather than discharging at the base of the building. It removes a cause of the damp rather than treating the wall, so it is checked before a damp course is priced. |
Prices are indicative ranges only. Every fixed price quote follows an on-site assessment.
Rising damp is ground water climbing a wall. Everything else - the salt, the lifting paint, the smell - follows from that one fact.
This is Ipswich's own version of rising damp, and it is created by a renovation rather than by the original house.
Ipswich is the oldest provincial city in Queensland, which means a share of its masonry predates the damp proof course entirely.
A damp course is not permanent. The two materials Ipswich houses actually have fail in completely different ways.
This misdiagnosis goes both ways. Rising damp can be dismissed as condensation, and condensation can be treated as rising damp at considerable expense.
If your property has been through 2011 or 2022, this question has to be answered before anybody quotes on a damp course.
Parts of Ipswich sit on reactive clay, and reactive clay cracks buildings. A crack lets water in, and then the wall looks damp.
On a timber house, damp is more likely to be a ventilation problem than a damp course problem - and ventilation is much cheaper.
Chemical damp proofing is licensable building work here, and the register that proves it is public and takes about a minute.
Injection is the standard way to put a barrier into a wall that never had one, or one whose original course has failed.
This can be the larger half of the bill, and it is the half a cheap quote leaves out.
These devices are sold widely, so here is a straight answer rather than a sales pitch in either direction.
An assessment should tell you what you have, not sell you a treatment. Sometimes the honest finding is that this is not rising damp at all.
Indicative ranges, what each one includes and what it does not, so you can sanity-check a quote before you accept it.
Rising damp is ground water soaking up into a wall from the soil underneath it. Brick, stone and mortar are full of tiny holes, and water climbs those holes the same way it climbs a paper towel. It stops about a metre up, where it evaporates as fast as it arrives. That is why it leaves a level line rather than a patch.
Not in its timber walls, while nothing touches the frame. A house standing on stumps with air underneath has no contact with the ground for water to climb; a path or slab poured against the bearers gives it one. What can get it is anything built in underneath later — a brick or block ground floor room, a laundry, a garage — because that work sits on the ground and may have no damp proof course. That is Ipswich's own version of this problem.
Almost certainly not. A modern slab has a membrane under it and the brick skin stands clear of the ground on its own edge beam. There is no route for ground water. A wet wall in a house that age is a leak, a shower, a drainage fault or condensation, and you need a different trade.
Timing and shape. Rising damp is worst from late summer into autumn, after the wet months, sits in the first metre of the wall and draws a level line. Condensation is worst on cold mornings, appears on the coldest surfaces in the room, often high in corners and around windows, and does not respect a horizontal line.
No, and it matters. Flood water saturates a wall through its full thickness and leaves salt behind at whatever height it reached. That damage can look exactly like rising damp years later. The difference is that flood salt does not need an ongoing water source, so installing a damp course will not fix it. The salt has to be drawn out of the wall.
Usually not directly. Parts of Ipswich sit on reactive Walloon clay, which swells when wet and shrinks when dry, and that movement cracks render. A crack then lets water in, so you get a wet wall — but the mechanism is movement, and injecting a damp course will not stop it. A stepped crack through brickwork should be looked at by a structural engineer before anyone quotes on damp.
It stops new water climbing. It does nothing about the water and salt already in the wall, which is what you can actually see. If the contaminated render is left in place, the wall will keep showing marks and the job will look like it failed. Budget for both halves.
A treated wall dries at roughly a month per 25mm of thickness, in good conditions. A 225mm solid wall is therefore most of a year. Plan the repaint for after that drying time, not for the weeks straight after injection.
The independent evidence for electro-osmotic and wireless systems is weak, and several reviews have found no measurable effect against an untreated control. We would not recommend spending money on one before a physical barrier and the ground conditions have been dealt with. If you are considering one, ask the supplier for a controlled trial rather than testimonials, and get the guarantee terms in writing.
An assessment is $450 plus GST. Injection runs $180 to $320 per linear metre depending on wall thickness and access, and render replacement $120 to $260 per square metre. Drainage and ground level work runs $900 to $6,000 and is often the item that does the most. Every figure here is indicative and a fixed price follows the assessment.
It can be. If a garden bed, a path or a concrete driveway sits above the damp course, it is carrying water past a barrier that is working perfectly well. Lowering the ground outside is cheap, permanent and sometimes the entire answer. We look outside before we quote, because that check can be the whole answer.
Injecting a damp course and replacing render generally does not require development approval. Drainage work, retaining walls over a certain height and any structural repair can. Ipswich City Council is the authority and their planning team will tell you before you commit to anything.
Rising damp is gradual deterioration, and home policies can exclude it. A sudden event — a burst pipe, a storm, a flood where you hold flood cover — is a different matter and may well be covered. Read the wording on gradual damage before assuming either way.
One damp specialist takes the job from the assessment to the finish, and gets it done in a timely, efficient way. Nothing on this page is a fixed quote, because the fixed price follows the assessment. In Queensland this is QBCC-licensed work, and you can check any licence on the public QBCC register.
If you are buying, yes, and read what it says about moisture carefully. A building and pest report flags moisture but is not a damp diagnosis, and the two get confused. If a report has flagged damp on a house you are buying in Ipswich, that is exactly the point at which a specific assessment is worth the money.
Not if the cause was dealt with rather than covered. A correctly installed barrier does not wear out on any timescale you need to care about. What does come back is damage from salt left in the wall, and damp from a garden bed rebuilt against the wall a year later. Both are avoidable, and both get blamed on the treatment.
You can, and it will look better for a season. Sealing the inside face of a wet wall does not stop the water arriving, it only stops it leaving where you were watching. It generally reappears higher up the wall or in the adjoining timber, and the second round of damage is worse than the first.
The damp itself is not, but persistently damp walls support mould, and mould matters for asthma and allergies. If someone in the house has a respiratory condition, that is a fair reason to deal with it sooner rather than watching it for another season.
Yes, we assess them. Nineteenth century commercial masonry, like the 1860s to 1890s shops and chambers in the CBD, is the stock most likely to have no damp course. Heritage listing does change what can be done to a facade, so tell us if the building is listed and we will work to that from the start.
About an hour for a typical house, longer where there is a built-in-under level or several affected walls. The written finding follows within a few days. It is deliberately not a five-minute look — the external check can be where the cause is found, and that part cannot be rushed.
The whole Ipswich local government area and the western corridor — the CBD and the heritage suburbs, the eastern suburbs around Booval and Bundamba, the river suburbs, and out through Springfield, Ripley and Rosewood. If you are not sure, ring and ask.
We work across the Ipswich local government area and the western corridor.
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Rising Damp Ipswich