How to paint a roof

Whether it's tiled or corrugated, painting your roof is a great way to add value to your home. To get the job done properly and safely, it's important to prepare thoroughly and use the right equipment.

Cleaning

Before you start painting, you need to give your roof a clean. A high-pressure washer is the quickest way to clean corrugated roofs. You can also use a hose and scrub down with a broom. This is also the best way to clean a tiled roof but you should first use chemicals to remove any lichen from the tiles.

Tiled roof preparation

Check your roof for any broken or cracked tiles and replace them. To repair any damaged mortar around the ridge capping, remove the capping and apply new mortar and put the capping back in place. Make sure the mortar is dry before you start painting.

Corrugated roof preparation

To clean a corrugated roof, wash it with a degreaser. However, if your roof is unpainted or you have any unpainted replacement sheets, give it a coat of primer. Make sure this is dry before you start painting.

Choosing your paint

Calculate the area of your roof and buy enough paint to apply two coats. Remember that darker colours absorb heat and lighter colours reflect it.

Painting a corrugated roof

Buy paint that is specifically designed for metal roofs because they adhere better and hold up against the elements. Like tiled roofs, airless spraying is the best and quickest way to paint but you can also buy paint rollers shaped like corrugated iron. However, you will need a brush to paint the corners and ridge caps.

Roof safety

  • Don't work on the roof alone
  • Wear sturdy shoes or boots, safety glasses and a hardhat
  • Make sure the ladder is on a solid, level surface
  • Wear a safety harness that's tied to something sturdy.
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Health & Safety

Please make sure you use all equipment appropriately and safely when following the advice in these D.I.Y. videos. You need to be familiar with how to use equipment safely and follow the instructions that came with the equipment. If you are unsure, you may feel it is safest to consult an expert, such as the manufacturer or an expert Bunnings Team Member.

Grave health hazards are linked to asbestos, which may be in homes built up to 1990. Health hazards may result from exposure to lead-based paints in older materials and copper chromium arsenic (CCA) treated timber. For information on the dangers of asbestos, lead-based paint and CCA treated timber and tips for dealing with these materials contact your local council's Environmental Health Officer or visit our Health & Safety page. You can also use a simple test kit from Bunnings to indicate the presence of lead-based paint.
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