Flooding can cause extensive damage to a home, not just from water intrusion but also from the damp and humid conditions that can follow.
After the extensive and devastating flooding in Auckland, Northland and the Hawke's Bay, we have put together some information to help out when it's time to repaint following flood damage.
To prevent additional paint damage, it's important your house is water tight as soon as possible after flooding. Depending on the extent of the flooding, it's important to have a professional inspect your home to make sure its structurally sound and safe - including all electronics - and safe to re-enter.
Safely remove all debris, mud and water. Wear suitable protective clothing and gloves. Proper ventilation is crucial to help dry out damaged surfaces. Ensure that affected areas are well ventilated by opening windows and doors (if weather permits) or use dehumidifiers and fans to help circulate air.
All flood damaged plasterboard, insulation, and timber that cannot be saved should be removed and replaced. Sound and completely dry surfaces can be cleaned with Selleys Sugar Soap. Mould may have started to show in some areas but it is recommended to treat all affected areas, including those above the water level, with Selleys Rapid Mould Killer as mould can be present but not visible prior to repainting.
The instructions below provide details for both existing substrates which have not recently been replaced as well as for surfaces with new paperfaced plasterboard (or exposed GIB® board). Please follow the instructions appropriate to you.
Lightly sand walls in preparation for applying primer.
New surfaces (paperfaced plasterboard and exposed GIB® board)
Fill cracks and surface imperfections with patching plaster or a suitable filler. Any gaps resulting from structural movement should be filled with a flexible gap sealant. Sand to a smooth finish as required. Ensure the level of finish is suitable for the coating sheen level and level of critical light.
Ensure surface is clean and free from dust. Dust off thoroughly with a damp cloth to remove loosely adhering jointing compound or cornice cement. Then you may prime as normal.
For walls with water staining from flood damage we recommend Dulux PRECISION High Opacity Stain Blocker in place of 1Step, to prime and seal the surface. Prepare the walls as above and apply one coat of the stain blocker evenly across the whole wall surface and allow to dry before applying your topcoat.
For walls heavily affected by mould we recommend Dulux PRECISION Stain and Mould Blocker in place of 1Step primer. Once existing mould is eliminated, apply one coat of stain and mould blocker evenly to the whole surface and allow to dry before applying your topcoat.
Dulux 1Step® Prep Water Based Primer, Sealer & Undercoat is your first step toward a superior long-lasting paint finish. With mould resistance and stain blocking of tannin and flash rust, 1Step® Prep ensures your interior or exterior paint shines now and into the future.
Once your walls are primed, lightly sand before applying your topcoat. We recommend which has superior washability, low odour, low VOC and is Environmental Choice approved. Dulux Wash&Wear can be tinted to thousands of colours and will keep your walls looking freshly painted for years to come.
For windows, doors and trims we recommend using as your topcoat. Check out our project guide and video . Dulux Aquanamel is a hard-wearing water-based enamel that is non-yellowing and is hardy against knocks and scrapes. Aquanamel can be used both indoors and outdoors, and can be tinted to any Dulux colour for a cohesive scheme.
For wet areas such as bathrooms or kitchens, we recommend using built specially to withstand humid or damp environments. The hard-wearing surface formed by Wash&Wear’s exclusive 101 Barrier Technology® contains a powerful mould inhibitor and water-repellent properties so you can wipe away most marks with a wet cloth. Plus it comes with a 10-year guarantee against mould growth*.
*Refer to product label for full conditions
We recommend applying two top coats, allowing each layer to dry sufficiently in between. has been specially designed to provide a tough, hard-wearing finish that provides protection from all weather conditions. Formulated with MaxiFlex™ Technology to expand and contract with the surface, Dulux guarantees Weathershield® won't peel, flake or blister for as long as you live in your home.
Our local Customer Service team is available to assist with colour, product and service questions. The Call Centre is open 6 days a week on 0800 800 424 and LiveChat is available 7 days a week.
Available 7 days a week, start a chat with our team to discuss everything you need to gain colour confidence.