Just as there are many different kinds of roofs, there are many different ways to make sure that the roof serves its primary objective – to be a shelter against all the elements. One of the ways to ensure that the roof prevents any water from seeping through into the house at an angle or a joint, and protects it against damage from rains, is roof flashing.

Roof flashing is a thin material that is installed by roofers under the shingles and joints of the roof to protect the edge and safeguard against any leaks. Roof flashing prevents water from leaking into vents, chimneys, skylights, and the edges of the roof. It helps prevent damage to these areas because they are the most likely to have leaked during the rainy season and be damaged by the water seeping through.

What does flashing do? And why is it important?

The importance of roof flashing cannot be emphasised enough. An improperly installed roof flashing can allow leakages from heavy rain to flood your home within a few hours. An impervious flashing prevents moisture-related problems such as weakened roofs, development of mould and also stops insects from invading your space.

Roof flashing is one of the most important aspects of a roof where professional roofing manufacturers in Sydney, such as Angels Roofing, will tell you that flashing is the protective layer for your home and that you need to pay careful attention to it.

There are different kinds of materials that are used for roof flashing. The choice of material depends upon factors such as the budget, durability, roof design, and the other materials that can come in contact with the flashing. Metals are mainly used for the purpose, where some common metals that are used include: aluminium, steel, and copper.


Aluminium is a lightweight and durable metal that can be used in its pre-formed roll and sheet shapes for flashing areas around the chimney, walls, and valleys. Aluminium is a budget-friendly material and is mouldable, and tends to hold its shape effectively. Coated sheets or rolls of aluminium must be used for flashing because the coating helps protect it against corrosion. It is important to note that uncoated aluminium corrodes when it comes into contact with cement and mortar, and as these two materials are commonly used in roofing, it becomes important to use aluminuim in its coated form only.


Copper is a more expensive but durable option that is available. At Angels Roofing, we offer copper flashing for chimneys, wall intersections, ridges and more. Copper is great for use in marine area home roof flashings and is a durable metal that can last for years on end. It installs easily because of its pliancy.

Stainless Steel

Stainless steel counts as a highly resilient and strong material for use in roof flashing. The material is in sheet form and the best aspect of this material for roof flashing is that it can survive the harshest of environments. So whether the house is near the sea and is affected by the salt spray, or whether there is a spell of acid rain or other such corrosive environments, stainless steel can survive. Moreover, it also does not matter what the surrounding material for the roof is like, being the least reactive to concrete and mortar alkalinity, stainless steel is a strong choice of material for roof flashing.

Modern elements in roof flashing also include:


Colourbond is a highly durable material and comes in a variety of colours so that apart from durability and protection from the elements, the material, when used in flashing can also add to the house’s aesthetics.


The material is durable and achieves a rustic look. It is a kind of galvanised steel that is used on heritage additions as well as modern architecture.


This material is an alloy of aluminium, zinc and silicon. It combines the best features of all three materials to be durable with a lifetime that is 4 times that of galvanised steel. It serves as a great material for roof flashing.

Roof flashing comes in many different types.

Types of roof flashing

There are many different types of flashing, which include:

1- Continuous flashing

Continuous flashing is also referred to as apron flashing. It acts as an apron, where long metal sheets are used to carry water down to the shingles. The disadvantage with this is that the flashing is not flexible due to the continuous length of the metal. Therefore, there are chances that it might get warped. The top roof flashing manufacturers in Sydney such as Angels Roofing make sure to have built-in expansion joints to prevent this from happening.

2- Base flashing

Base flashing is done when there are some tricky roof features such as chimneys involved. Two pieces of flashing are used so that installation becomes easier and the flashing can adjust when the house expands or contracts as per the weather.

Other kinds of flashing include counterflashing – used to complete base flashing, step flashing – for the roof to wall layers, skylight flashing, valley flashing, and drip edges. To direct water away from the wall and into the gutter, another kind of flashing called kick-out flashing is used. No matter what kind of flashing is used, it is important to seal and place the material appropriately.

Disclaimer: This is a generic Information & post; content about the services can be changed from time to time as per your requirements and contract. To get the latest and updated information, contact us today or visit our website.