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What are Chimney Flashings and why are they Important?

  • News
  • 07 - 03 - 2021
  • By Heritage Plumbing

Chimney Flashings

Chimney flashing provides a skirt around a chimney when it meets the roof so that water and debris do not enter the roof space and cause damage inside a property. When a chimney is installed through the roof from the internal fireplace, it passes through the roof cavity and out into the external environment of the property. Chimney flashing is placed around the edge of the chimney against the roofline to create a permanent and resilient seal at the junction. It is crucial that chimney flashing is correctly installed in accordance with building and plumbing code requirements to ensure the property is protected.

Licensed and experienced plumbers can install chimney flashing at homes in Melbourne. With a chimney flashing kit, the correct tools, appropriate knowledge and a can-do attitude, chimney flashing can be effectively installed in a couple of hours. Once installed, the flashing should last decades provided that it is maintained over time and does not deteriorate due to foreign deposits (such as acids or salts from rainwater and debris). If you notice water trickling inside from the chimney area, or that the flashing has been compromised, replace it immediately to avoid further damage to your property.

Here are 5 reasons why chimney flashings are important for your property.

Moisture barrier

The roof on your property acts as a shield from the external environment. Without chimney flashing, water, debris, dust and other foreign particles will pass through into the roof cavity and may cause internal damage including electrical faults. Create a moisture barrier using quality chimney flashing that has been correctly installed. This will enable water and debris to flow down the roof line and into the gutters and the connected storm water network.

Thermal barrier

Without chimney flashing, the thermal efficiency of the property will be compromised. Even with insulation, exposed gaps in the roof line can cause heat to escape which means it will be difficult to regulate internal temperature. Make sure the roof is completely sealed with chimney flashing so that your property stays cool in summer and warm in winter. Otherwise, you will incur higher electrical costs to regulate the temperature inside the home.

Pest control

Chimney flashing will provide a barrier that does not allow pests to enter your roof cavity. Whether your property has possums in the vicinity, rats or other nasty pests, make sure your roof is sealed so that they do not find a home inside your roof space. Chimney flashing should be installed completely around the perimeter of the chimney masonry where it meets the roof line so that there are no gaps or parts that can be prised open.

Property maintenance

Correctly installed chimney flashings will support with the property’s maintenance. Chimney-flashings rarely need to be maintained if installed correctly by a licenced plumber. At most, you may have to clean around the chimney if you live in an area where there are large trees dropping leaves and twigs etc. Chimney flashing is made from tough and resilient metal that will resist corrosion and cracking.

Regular inspections

While your roof does not need to be maintained every year, a regular inspection is important. This will help to identify small issues or problems before they arise. Preventative maintenance does help to prevent issues becoming large problems that take time to resolve and cost more money. Given chimney-flashings are installed on the roof high above the ground and takes skill to install correctly, ensure inspections, installation and repairs are left to the professionals.

At Heritage Plumbing Group, our team of licensed and experienced plumbers can install chimney flashing at your property. Whether you are building a new property or need your chimney flashing replaced, we can attend to this activity at any type of property. For more information about chimney flashing, or to book in an installation appointment, please contact the team on (03) 9498 0458.

Chimney-Flashings FAQs

How much does it cost to replace chimney flashing?

The cost varies depending on the size of the chimney, the type of flashing required, the location of the chimney, the pitch and height of the roof and other factors. The approximate cost varies between $800 and $2,500 (excl. GST) which includes materials and labour.

What are chimney-flashings made of?

Chimney flashing is made from a metallic material that will not oxidise and creates a waterproof seal that protects your roof and chimney from moisture penetration. The material is available in a range of colours to match the roof’s décor.

Do roofers replace flashing?

Yes. We can replace chimney flashing if the material has deteriorated or water is seeping through cracks or holes. Chimney flashing is easy to replace by an experienced and licensed roof plumber.

Is chimney flashing necessary?

Yes. Chimney flashing will prevent water entering your property at the point where the chimney meets the roof. Failing to apply flashing will leave a gap for water and debris to pass through. Ensure your roof is sealed with quality chimney flashing.

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