Rising Damp

Rising Damp Treatment on the Northern Beaches

Damp that creeps up your walls from the ground — bubbling paint, crumbling plaster, that musty smell — is rising damp. Painting over it never works. We find where the moisture is coming from and treat it at the source, for homes across the Northern Beaches and North Shore.

Book a Site Assessment

See Our Remedial Projects

or call 02 9940 2229

THE SIGNS

Rising damp shows up low on the wall — and keeps coming back.

Rising damp is groundwater wicking up through masonry where the damp-proof course has failed or is missing. It shows in a band near the floor and returns no matter how often it’s painted — because the water is still coming.

A tide line low on the wall

A stain band up to roughly a metre from the floor.

Bubbling, flaking paint & render

Finishes pushed off by moisture and salt.

Crumbling or salty plaster

White salt deposits (efflorescence) on the surface.

Skirting & timber rot

Damp wicking into skirtings and floor timbers.

A persistent musty smell

Moisture held in the wall.

Damp that returns after painting

The tell-tale sign it’s rising damp, not a one-off leak.

You can’t paint your way out of rising damp — the damp-proofing has to be restored.

WHAT WE DO

Stop the moisture at the source.

We diagnose why the damp-proofing has failed, restore the barrier and make good — so the wall dries out and stays dry.

Moisture diagnosis

Confirm it’s rising damp (not a leak or condensation) and find the source.

Damp-proof course restoration

Inject a new chemical DPC to re-establish the barrier.

Salt-affected plaster removal

Strip contaminated render/plaster back to sound masonry.

Re-rendering & making good

Salt-resistant render and finishes, ready to repaint.

Drainage & ground levels

Fix external causes: garden beds, paving and drainage against the wall.

Ventilation & sub-floor

Improve airflow where trapped moisture is a factor.

HOW WE WORK

Diagnose, treat, dry, make good.

Rising damp needs the cause fixed and time to dry — we do it in the right order.

Site assessment

Inspect and moisture-test to confirm rising damp and its source.

Diagnosis & scope

Rule out leaks and condensation; define the works with an itemised quote.

Treat the cause

Restore the damp-proof course and fix external ground / drainage issues.

Remove & re-render

Strip salt-affected plaster and re-render with salt-resistant systems.

Dry & make good

Allow the wall to dry, then finish ready to repaint; documented.

“

From start to finish, the Beaches Group team demonstrated professionalism and a dedication to delivering top-notch results. Not only did they stay within budget, but the quality of their work exceeded our expectations.

— Harry, Mona Vale

NORTHERN BEACHES SPECIALISTS

Common in older coastal homes.

We treat rising damp in homes across the Northern Beaches and North Shore — from older brick and sandstone cottages to homes where garden beds and paving have bridged the damp course.

Palm Beach
Avalon
Mona Vale
Manly
Mosman
Freshwater
manly

WHY BEACHES GROUP

Why homeowners trust us to fix the damp.

We diagnose the cause

Confirm it’s rising damp and find the source, not just paint over the stain.

Treat, don’t cover

Restore the damp-proof course so the water stops coming.

Salt-resistant systems

Re-render that stands up to the salts rising damp leaves behind.

We fix the external causes

Garden beds, paving and drainage that bridge the damp course.

Documented

A clear record of the treatment for you and any insurer.

COMMON QUESTIONS

Rising damp, answered.

Why does rising damp keep coming back?

Because painting or sealing only covers the surface — the groundwater is still wicking up through the wall where the damp-proof course has failed. Until the barrier is restored and the external causes fixed, it returns. That’s the difference between covering it and treating it.

How do I know it’s rising damp and not a leak or condensation?

Rising damp shows as a tide line low on the wall (up to about a metre), with salts and bubbling finishes, and it returns after painting. Leaks and condensation show differently. Our site assessment includes moisture testing to confirm the cause before we quote.

Can I just repaint or seal the wall?

No — sealing traps the moisture and often pushes the damp higher. The fix is to restore the damp-proof course, remove the salt-affected plaster and re-render with salt-resistant materials, then let the wall dry.

How much does rising damp treatment cost?

It depends on the length of wall affected, access and the external causes involved, so we price against your home after a site assessment and give you an itemised scope before any work starts.

How long before the wall dries out?

Once the cause is treated and the wall re-rendered, masonry can take some weeks to fully dry before final painting — we’ll give you a realistic timeframe for your home.

Where do you work?

The Northern Beaches and Sydney’s North Shore — rising damp is common in the older coastal homes here.

DAMP CREEPING UP?

Book a site assessment.

Send us a few photos of where the damp is showing, and we’ll assess it. Or call 02 9940 2229.