Flood protection for homes in Ireland

Start with the map, then look at the house

Use the OPW’s Floodinfo map to explore river, coastal and past-flood information around your area. Read the selected layer’s notes. These are community-scale maps, not a property survey, and an unshaded house can still face flooding from sources that were not modelled.[4]

Ask an appropriately qualified flood-risk professional to look at likely entry routes and suitable measures. Doors are only part of the picture: vents, drains and the building itself need consideration.[2] Bring photographs of previous flooding if you have them. Ask neighbours what happened locally, while keeping their recollections separate from a professional assessment.

Make a short action card: who needs help leaving, where you would go, where the documents are and who can deploy the protection. Keep documents waterproofed and essential medicines, keys, phone and charger ready.[1] Practising the plan on a dry afternoon is a much nicer job than learning it in rising water.

Properly assessed barriers and pumps can reduce damage, but neither guarantees a dry house or makes it safe to stay during a flood.[2][3]

Buy barriers for your openings

OPW describes removable floodboards, floodgates and temporary vent covers. It advises looking for a quality-assured product and expert advice on suitability.[2] Ask the supplier to specify:

• The opening measurements and wall or frame requirements.
• The assessed water depth the installation is intended to resist.
• What still needs protection elsewhere in the building.
• Who will fit it, how it is deployed and where it will be stored.
• The inspection and replacement schedule for seals and fixings.

Do not choose by width alone. OPW warns that holding back deep water can damage a building. Its guidance says never block openings above one metre, but that is not a promise that every wall can safely resist water below that level. Get a property-specific assessment.[2]

Temporary vent protection also needs a removal plan. Fuel-burning appliances require ventilation: never run them with their required air supply blocked.[5] Ask the assessor to reconcile flood measures with fire and gas safety.

A sump pump needs more than a socket

A pump can remove accumulating water, but it needs a suitable collection point and somewhere safe to discharge. UK Environment Agency guidance recommends an electrician’s advice before using an electric pump and warns against pumping water into another flooded area. This is technical guidance, not a statement of Irish permitting rules.[3]

Ask the installer to specify the required flow at the actual lift and discharge route, plus an alarm, maintenance and a power-cut plan. A pump sold with a large maximum flow still needs to suit your installation. Ask for the manufacturer’s performance curve and a commissioning demonstration.

Work out the backup energy with the installer. Example assumptions: a pump draws 500W while running and runs for one quarter of each hour. Eight hours requires 500 × 0.25 × 8 = 1,000Wh at the pump. If the backup delivers 80% of its labelled capacity, that is 1,000 ÷ 0.80 = 1,250Wh nominal. These are illustrative inputs, not typical flood conditions or a product guarantee.[6]

The battery must also support starting demand. If the same pump runs continuously, the eight-hour requirement becomes 4,000Wh at the pump, or 5,000Wh nominal under that assumption. Test the actual equipment and leave an appropriate reserve.[6]

Do not enter standing water to retrieve a battery or operate electrical equipment. After flooding, have affected services checked before restoring them.[7] A fuel-powered pump or generator must remain outdoors, away from openings; combustion exhaust can cause fatal CO poisoning.[5]

Pumping out too soon can cause damage

An empty basement surrounded by saturated ground can face dangerous pressure on its walls. OPW specifically warns against rushing to pump it out.[7] For substantial pumping, the Environment Agency advises waiting until water outside is lower than inside, and seeking structural advice for deep flooding.[3] Leave this decision to the appropriate professionals.

During a flood, follow local authority and emergency-service instructions. Do not walk or drive through floodwater to fetch equipment. Leave when advised, rather than staying to watch a pump.[8]

Check the insurance before the forecast

Ask your insurer or broker to confirm flood cover, exclusions, the flood excess, contents limits and alternative accommodation. Ask whether they need notification of installed protection. OPW says cover and premiums are individual insurers’ commercial decisions; its maps do not guarantee an insurance outcome.[9]

Do not assume buying a barrier automatically secures cover or a discount. Keep the assessment, specifications, installation invoice and photographs so the insurer can evaluate the actual measures.

If flooding occurs, contact the insurer promptly. Photograph damage and water levels when safe, keep correspondence and receipts, and agree clean-up and repair work with the insurer. Photograph contaminated items before disposal if they cannot safely be retained. Check accommodation cover if you need to move out.[7]

Ask your council about local protection schemes and advice. OPW’s Minor Flood Mitigation Works scheme is a route for local authorities to apply for eligible works, not a universal household voucher for a barrier.[10]