Permanent rising damp treatment for Sydney homes — diagnosed properly, treated at the source and backed by a lifetime guarantee. Free inspection, fixed price, no mess left behind.
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Rising damp is ground moisture wicking up through the base of a wall where the original damp-proof course has failed or was never there. Left untreated it destroys plaster, paint and skirting, carries salt into the masonry and creates the damp, musty conditions mould thrives in. As Sydney's rising damp treatment specialists, we don't sell band-aid fixes — we diagnose the cause and treat it so it stays gone.
If you've searched for rising damp services or a rising damp company in Sydney, you've probably been quoted everything from a quick paint-over to a full rebuild. Our approach sits where it should: a proper diagnosis, the right treatment for your wall, and a finish that lasts — all at a fixed price agreed before we start.
Not all damp is rising damp — and treating the wrong cause wastes your money. Plumbing leaks, condensation and trapped moisture under the floor can all leave similar marks, so we rule those out first. If the real problem is stale, humid air under the house, the fix is subfloor ventilation, not a damp-proof course. If it's surface growth, that's mould remediation. A free damp inspection confirms the true cause before anyone talks about treatment — which is exactly why our work lasts.
Rising damp is slow — it works up through the wall over years, so by the time most people call, the damage is already well underway. Left untreated it doesn't just stay a cosmetic mark; it spreads into the structure of your home and changes the air you live in.
Ground moisture is drawn up through the masonry and evaporates near the surface, leaving destructive salts behind. Over time that shows up as:
What begins as a cosmetic mark becomes structural. Treated early it needs a damp-proof course and fresh render; left for years it can mean masonry repair at many times the cost — and a home that's harder to heat and harder to sell.
Rising damp creates the cool, moist, salt-rich surfaces mould thrives on — and that's where it stops being only a building problem. Damp and mould are well-recognised contributors to poor indoor air quality. Australian health authorities note that living in a damp or mouldy home is associated with a higher risk of respiratory issues such as coughing, wheezing and worsening asthma, along with eye, nose and throat irritation and allergic reactions. Children, the elderly and anyone with asthma or allergies tend to be most affected.
Day to day it means a persistent musty smell that won't shift, cold and clammy walls, and mould that keeps returning no matter how often it's wiped away — because the moisture feeding it is still rising through the wall. Treating the damp at its source is what finally breaks the cycle.
This is general information, not medical advice. If you're concerned about health symptoms, speak with your doctor.
We confirm it's rising damp, find the cause and measure the affected area — then quote a fixed price.
We install a new chemical DPC into the wall to create a permanent barrier against rising moisture.
Salt-contaminated plaster is removed and replaced with a salt-resistant render so the damage can't return through the surface.
Walls are made good and paint-ready, the site is left clean, and the work is backed by our lifetime guarantee.
Installing the damp-proof course stops moisture rising immediately — but the wall won't look dry overnight. Visible drying happens gradually over the following months as trapped moisture and ground salts work their way out. That's normal, and a sign the wall is breathing as it should.
It's also why the finish matters. We use a breathable, salt-resistant render — never an acrylic or waterproof coating, which traps moisture and concentrates salt at the surface. Sealing a treated wall with the wrong finish is the single most common reason damp appears to "come back" within months. If your walls need restoring afterward, that's our damp plastering work.
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Read our Google reviews →We diagnose the cause first, then install a new chemical damp-proof course (DPC injection) to stop moisture rising through the wall, remove salt-contaminated plaster, apply a salt-resistant render and restore the finish — all backed by our lifetime workmanship guarantee.
Cost depends on the length of wall affected and the extent of the damage, so we give you a fixed price upfront after a free inspection — no hourly rates and no surprises.
Most homes are completed in a few days, depending on the size of the job and the replastering involved. We confirm the timeframe in your fixed-price quote.
Yes — all of our damp-proofing work is backed by a lifetime workmanship guarantee. If treated damp returns, we come back and fix it.
Rising damp typically shows as a tide mark up to about a metre high with salt deposits, whereas leaks and condensation behave differently. Our free inspection confirms the real cause before any treatment is recommended.
All of greater Sydney — including the Inner West, Eastern Suburbs, North Shore, Northern Beaches and Parramatta — with same-day inspections available Monday to Saturday.
Fixed price, lifetime guarantee, and a team that fixes it properly the first time.
From the Inner West to the Northern Beaches, the Eastern Suburbs to Penrith and the Blue Mountains — Rising Damp Sydney treats rising damp, mould, subfloor moisture and waterproofing problems right across the greater Sydney region. Free inspection, fixed price, same team from first call to final coat.
Sydney's trusted rising damp, mould & subfloor specialists — licensed, insured and lifetime guaranteed.