Damp Proofing Dublin

We trace where water gets in from outside, then repair the roof, chimney, gutter or wall at fault.

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Free, no-obligation quote

Get a FREE Quote

Tell us about the roof and we will call you back to arrange a visit.

Free QuotesWritten, no obligation
24/7, 365 daysEmergency call-outs
Since 2018Sandyford, Dublin 18
Fully insuredPublic liability cover

Damp Proofing

Damp That Starts at the Roof

A brown ring on a bedroom ceiling or a patch of wet plaster high on a wall is rarely a problem with the paint or the plaster itself. In most cases it is water getting in from outside, through the roof, the chimney, a gutter or the wall face, and it will keep coming back until that entry point is closed.

Our approach is to trace the damp back to the point of entry, and that is often well away from the stain itself. Water can run along a rafter or down the inside of a chimney breast before it shows, so we look at the roof and the outside of the building, not only the room where the mark is.

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Common Causes of Damp We Repair

These are the faults we find most often behind damp patches in homes and commercial buildings. Each one has a straightforward roofing or masonry fix once it has been found, and none of them is solved by treating the inside wall.

Slipped or Cracked Slates & Tiles

One missing slate lets rain onto the felt beneath, and old felt eventually gives way. The result is usually a stain on the ceiling below or wet insulation in the attic.

Chimney Stacks & Flashing

Cracked flaunching around the pots, open mortar joints and lifted lead flashing where the stack meets the roof all let water in. Damp on a chimney breast inside often traces back here.

Leaking or Overflowing Gutters

A gutter that drips at a joint or spills over in heavy rain pours water down the same section of wall every time. Over months, that soaks through to the inside.

Worn Pointing & Wall Faces

Eroded mortar joints, cracked render and failed sealant around openings let wind-driven rain into the wall. Repointing and repairing the outer face gives the masonry back its ability to shed water rather than soak it up.

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What’s Included

Signs of Water Getting Into Your Building

Damp from the roof and outside walls tends to appear after rain and get worse in wet spells. Look out for any of the following, and note when they show up, as that helps us find the cause.

Brown rings on ceilings
Wet patches on chimney breasts
Peeling paint high on walls
Black mould in upper corners
Damp insulation in the attic
Green streaks on outside walls
Crumbling mortar between bricks
Musty smell in one room

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Penetrating Damp, Condensation or Rising Damp?

Not all damp is the same, and the fix depends entirely on the type. Penetrating damp is water coming through the roof or walls from outside, and that is what we repair. Condensation is moisture from cooking, showers and drying clothes settling on cold surfaces, and it usually needs better ventilation and heating rather than building work.

Damp that rises from the ground only shows low down on walls, usually under a metre high. If what we find looks like ground-level damp rather than water from above, we will tell you honestly instead of selling you a roof repair you do not need.

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Reviews

What Our Customers Say

Rated Excellent on Trustindex. Every review is written by a customer, never by us.

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24/7, 365 Days a Year

You're in good hands

Storm damage, a leak through the ceiling or a slipped ridge tile: our phone is answered day and night, every day of the year.

FAQs

FAQs About Our Damp Proofing Service

These are the questions people ask us most when damp patches start appearing in the house.

How do you find where the damp is coming from?

We start with where and when the damp appears, then work outwards and upwards. That means checking the roof covering, chimney, flashing, gutters and outside walls above and around the affected area. Water often travels before it shows, so a stain in one corner can come from a fault a metre or two away on the roof.

Will painting over the damp patch fix it?

No. Stain-blocking paint can hide a mark for a while, but if water is still getting in, the patch comes back and the plaster behind keeps getting wetter. The source has to be repaired first.

How long does a wall take to dry after the leak is fixed?

It varies with how wet the wall got and how thick it is. A ceiling stain from a short leak can dry in a few weeks, while a solid wall that has been soaking for months can take much longer. Keeping the room heated and ventilated helps, and we can advise when it is safe to redecorate.

Do you do chemical damp proof courses?

Our damp work focuses on water getting in from the roof, chimney, gutters and outside walls. We do not inject chemical damp proof courses. If we find that the problem is rising from the ground, we will tell you so you can get the right specialist, rather than doing roof work that would not help.

Can damp come through a flat roof?

Yes, and flat roofs are a common culprit over extensions, garages and dormers. Splits in old felt, failed joints and poor detailing at upstands and edges all let water through. We can repair the problem area or recover the roof with EPDM rubber, GRP fibreglass or a liquid membrane, depending on its condition.

Ask Us Anything

Question About Your Roof?

Ring the office or message us on WhatsApp with a photo and you will get a straight answer.

Call, 24/701 263 5253
WhatsApp089 968 1613
Office
6 Fern Road, Sandyford, Dublin, D18 FP98

Why Choose Us

Why Choose Us for Your Damp Proofing?

Most damp in the upper half of a building comes from the outside in.

Sandyford, Dublin 18

An Office You Can Find, a Phone That Gets Answered

Quotes, bookings and any follow-up are handled from our office on Fern Road in Sandyford, Dublin.

Cause Before Cure

We look at the roof, chimney, gutters and walls before recommending anything, so the money you spend goes on stopping water at the point it enters.

One Trade, Whole Envelope

Slates, lead, chimney masonry, gutters and pointing are all work our roofers carry out, so you are not passed between different contractors.

Honest About Other Causes

If the damp turns out to be condensation or coming up from the ground, we will say so and explain why our repairs would not fix it.

Insured & Guaranteed

Our qualified roofers work with full public liability insurance on every job, and the damp repairs we complete outside your building are backed by our guarantee.

Free Quotes, Written Down

Call or send the form with your Eircode and we will arrange a visit, look at the roof and price the work before anything starts.

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Irish Suppliers

Irish Names We Work With

Flat roof membranes, fibre cement and natural slate from Irish suppliers.

Professional Damp Proofing

Since 2018 Dublin Roofing Company has been tracking down leaks and keeping water out of homes and commercial buildings across Dublin, Kildare, Meath, Wicklow and Louth. Because damp so often begins at the roof or chimney, our roofers are well placed to find it and repair it, whether that means a few slates, new lead flashing or repointing a stack.

Photos help us a lot with damp. Take one of the stain inside and one of the roof or wall outside above it, send them to 089 968 1613 on WhatsApp, and tell us whether it gets worse in heavy rain.