Rising Damp
  • NSW Plumbing License Number #364116C

Protect Your Property From Rising Moisture Damage

Rising damp is one of the most destructive moisture problems affecting older homes across the North Shore. If you’ve noticed damp patches on your walls, peeling paint, a musty smell, or white salt deposits appearing on your brickwork, your property may be suffering from rising damp. The good news? It can be permanently fixed – but only with professional intervention.

At North East Plumbing, we specialise in diagnosing and treating rising damp issues for residential properties throughout North Shore Sydney. With our comprehensive solutions, we stop moisture at its source and protect your home’s structural integrity for years to come.

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Customers love our punctuality, professionalism and value

Exceeded my expectations!

James was absolutely professional, and he knew exactly what he was doing. He exceeded my expectations, and I was very satisfied with the outcome.

Edward Yang

Edward Yang

Great price as quoted

The guys were punctual, explained everything to me, fixed our leaking roof for a great price, exactly as quoted. Highly recommended.

Anameka Sethi

Anamika Sethi

Work quality was top notch!

It was a small job, James did the quote then offered to do the work then and there. Very happy with it, extremely professional and quality work.

Paul Peterson

Paul Peterson

What Causes Rising Damp?

Rising damp occurs when moisture from the ground is drawn up through the walls of your home via capillary action – like water climbing through a sponge. This is particularly common in North Shore properties because:

Older Homes & Heritage Properties

Many North Shore suburbs feature Federation-style homes, terraces, and heritage buildings built before modern waterproofing standards. These often lack proper damp-proof courses (DPC) or have aging, deteriorated barriers that no longer function effectively.

Failed or Damaged Damp-Proof Courses

Even homes with an original DPC often develop problems as the barrier cracks, dislodges, or becomes bridged by concrete slabs, debris, or soil movement. North Shore’s topography, with elevated land slopes and shifting soils, can exacerbate these issues.

Poor Sub-floor Ventilation

Inadequate ventilation beneath your home traps moisture, creating conditions that accelerate rising damp and structural damage.

Drainage Issues

Poor site drainage, blocked drains, or guttering damage can force water beneath your house, increasing groundwater pressure against your walls.

Ground Water Levels

High water tables, common in certain North Shore areas, force moisture upward through walls and foundations with significant pressure.

Moisture in walls

How Rising Damp Damages Your Home

Leaving rising damp untreated is like letting slow water damage spread through your foundation. The consequences are severe and expensive:

Structural Deterioration

Structural Deterioration

Moisture weakens bricks, mortar, and concrete, causing them to crumble over time. Paint blisters and peels. Plaster crumbles and requires constant patching. Salts carried by moisture create efflorescence – those unsightly white deposits – that damage masonry further.

Timber Rot

Timber Rot & Decay

Damp environments encourage fungi, bacteria, and mould growth. Wooden floorboards, joists, architraves, and skirting boards rot from the inside out, compromising structural safety and requiring expensive replacement.

Termite & Pest Infestations

Moist subfloors attract termites and other wood-destroying insects. What starts as a damp problem becomes a termite nightmare, threatening the entire structural frame.

Mould on external concrete

Health Risks

Rising damp creates ideal conditions for mould and mildew growth. Prolonged exposure triggers respiratory problems, asthma, allergies, and bronchitis – particularly affecting children and elderly residents.

Reduced Property Value

Unaddressed rising damp significantly impacts your home’s market value and insurability.

Early Warning Signs

Catching rising damp early is key to preventing extensive damage. Watch for these telltale signs:

  • Damp patches or staining on internal walls, typically up to 1-1.5 metres from floor level

  • Peeling, blistering, or bubbling paint and wallpaper near skirting boards
  • Crumbling, soft plaster that feels wet or smells musty
  • White, powdery salt deposits (efflorescence) on walls and brickwork
  • A persistent damp, musty odour in affected rooms
  • Decaying or soft skirting boards and architraves
  • Visible mould or discolouration appearing seasonally or year-round

If you’ve spotted any of these signs in your North Shore home, don’t delay – early intervention saves thousands in repair costs. Call us today on 02 8007 6200

Our Professional Rising Damp Solutions

North East Plumbing takes a comprehensive, diagnostic-first approach to rising damp. We don’t guess – we measure, assess, and deliver tailored solutions.

Stage 1: Complete Property Assessment

We conduct a thorough inspection of your entire property, using industry-grade digital moisture meters to measure moisture content in walls, floors, and subfloor areas. This precision diagnosis identifies the exact source and extent of rising damp, ensuring we target the real problem – not just the symptoms.

Stage 2: Install or Replace Your Damp-Proof Course

We install a new chemical or physical DPC at ground level to create an impermeable barrier that stops moisture rising through your walls. Our injection method uses low-viscosity liquid that penetrates deep into the masonry, reaching areas traditional methods miss. This creates an invisible, permanent water-resistant barrier that lasts for decades.

Stage 3: Remove Contaminated Plaster & Finishes

Salt-contaminated plaster must be removed and replaced with breathable, salt-resistant materials. This prevents the problem from recurring and restores your walls to a clean, healthy state.

Stage 4: Improve Subfloor Ventilation

To prevent moisture accumulation beneath your floors – which worsens rising damp – we install or upgrade ventilation systems. Improved airflow reduces humidity and extends the life of your subfloor timbers.

Stage 5: Address Drainage & External Issues

We inspect guttering, downpipes, and site drainage to ensure water is directed away from your property. Poor drainage often accelerates rising damp, so fixing these issues prevents future problems.

Frequently Asked Questions

Yes. Chemical DPC injection, combined with proper drainage and ventilation improvements, permanently stops rising damp. Once treated and dried, affected areas are replastered with salt-resistant materials to prevent recurrence.
Diagnosis typically takes a few hours. Treatment varies depending on your home’s size and severity, but most projects are completed within a week or two. We minimise disruption and work efficiently to restore your property.
No. Our injection method is non-invasive. We drill small, regularly-spaced holes in mortar joints, inject the chemical barrier, and seal the holes. Once complete, there’s no visible sign of treatment.
Costs vary based on the extent of the problem, your home’s size, and the treatment method required. That’s why we offer free assessments – we provide accurate quotes only after understanding your specific situation.
Most insurance policies do not cover rising damp, as it’s considered a maintenance issue. However, damage caused by rising damp (timber rot, mould, structural issues) may be covered under certain policies. We recommend checking with your insurer.
Rising damp comes from moisture in the ground being drawn up through walls. Condensation damp results from excess indoor moisture (from cooking, showering, etc.) settling on cold surfaces. They require different treatments, which is why accurate diagnosis is essential.

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Get a fast quote directly from our licensed plumbers James and Mitch by calling 02 8007 6200 or complete the enquiry form and they’ll be in touch shortly.

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Our wide range of Plumbing Services

Are you looking for a ‘plumber near me’? North East Plumbing are your local licensed plumbers who specialise in a wide range of services including repairs, replacements to emergency plumbing and new installations.

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Service Areas

North Shore and Eastern Suburbs of Sydney – We’ve Got You Covered!

We service the entire North Shore and Eastern Suburbs area of Sydney as well as the Newcastle area from our Regional Office. You’ll regularly find us in the following suburbs and surrounding areas.

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Get your fast quote today!

Get a fast quote directly from our licensed plumbers James and Mitch by calling 02 8007 6200 or complete the enquiry form and they’ll be in touch shortly.