A dry home is one of the simplest foundations of good health. We spend most of our lives indoors, so the air in our living rooms and bedrooms matters as much as the food we eat.
In Ireland, damp is a familiar problem. Our mild, wet climate means rain, wind and humidity test every roof, gutter and wall, often for months on end. When moisture gets inside, it rarely stays harmless for long.
One of the most common sources of indoor damp is also one of the easiest to overlook: a roof that has started to leak.
How a leaking roof brings moisture into your home
A roof leak is not always a dramatic drip into a bucket. More often it is slow and hidden. A cracked or slipped slate, a worn valley, failed flashing around a chimney or a split in a flat roof membrane lets in a little water every time it rains.
That water soaks into roof timbers, insulation and the top of the walls. Wet insulation stops working, so rooms get colder and condensation forms more easily. Plaster and ceilings absorb moisture and stay damp for weeks after the rain stops.
By the time a stain appears on the ceiling, water may have been getting in for months.
From damp to mould: what happens next
Mould needs three things to grow: moisture, a surface to feed on and mild temperatures. A damp home provides all three. Timber, plasterboard, wallpaper, carpets, curtains and even dust are all food for mould.
Once mould settles on a damp ceiling or wall, it can spread within days. You may see black, green or grey patches, often in corners, behind furniture or around windows. Sometimes it grows out of sight, in the attic or inside the walls.
As mould grows, it releases tiny spores into the air. They are far too small to see. Every time a door opens, someone walks past or the heating comes on, these spores move around the house and into the air you breathe.
How mould affects your health
When we breathe in mould spores, they reach the nose, throat and lungs. Health bodies such as the World Health Organization link damp and mouldy homes with breathing problems. Living with mould over time can lead to:
- a persistent cough, wheezing and shortness of breath
- a blocked or runny nose, sneezing and sore throat
- itchy, watery eyes and skin irritation
- more frequent chest infections
- new or worsening asthma attacks
- tiredness, headaches and poor sleep
Some people are more at risk than others:
- babies and young children, whose lungs are still developing
- older people
- anyone with asthma, allergies or other lung conditions
- people with a weakened immune system
Many families blame a winter cold that never quite goes away, when the real cause is the air inside their own home. If anyone in your house has ongoing symptoms, talk to your GP, and deal with the source of the damp as well.
Warning signs your roof may be letting in water
Catching a leak early saves money and protects your family. Look out for:
- brown or yellow stains on ceilings, especially in upstairs rooms
- peeling paint, bubbling plaster or damp patches near the top of walls
- a musty, earthy smell that will not go away
- black spots of mould on ceilings, in corners or around windows
- damp or dark timbers and wet insulation in the attic
- missing, cracked or slipped slates and tiles
- damaged flashing around chimneys, skylights or walls
- water pooling or cracks on a flat roof
- overflowing or blocked gutters and downpipes
If you notice even one of these signs, it is worth having the roof checked before the next spell of heavy rain. Our guide to a roof leaking in heavy rain explains the most common causes in more detail.
How to keep your home dry and healthy
Cleaning mould off a wall only treats the symptom. If water keeps getting in, the mould will come back. A healthy home starts with a sound roof.
- Fix the source. Have any leak found and repaired properly, not just patched.
- Dry out the damage. Replace wet insulation and let affected timbers and plaster dry fully.
- Treat the mould. Clean affected areas safely, or get professional help for large patches.
- Ventilate. Open windows daily, use extractor fans in kitchens and bathrooms, and avoid drying clothes on radiators.
- Keep gutters clear. Blocked gutters push water back under slates and into walls.
- Get regular roof checks. An inspection after winter storms catches small problems before they become big ones.
Talk to AltRoofing
AltRoofing repairs and replaces pitched and flat roofs across Kerry, Cork and Limerick. We find the real cause of a leak, fix it properly and back our work with a written guarantee.
If you have spotted damp, stains or mould, do not wait for it to spread. Call us on 085 220 1422 or email info@altroofing.ie to arrange a roof inspection. A dry roof means a dry home, and a dry home is a healthier home for your whole family.