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Types of Roof Flashing

Types of Roof Flashing

Roof flashing is critical in making sure water does not enter your roof.

Sydney homes receive a battering from the extreme weather conditions it experiences all year round. Heat waves, hail storms, heavy rainfalls, and  string wind, can all take a toll on your home, particularly the roof. Over time, these weather events may affect the structural integrity of your home’s roof system, resulting in damaged roofs and leaks.

This is why routine maintenance is important in reinforcing your roof and making its individual parts effective against any weather. One of the most overlooked yet, extremely crucial part of the roof is the unassuming, simple roof flashing.

What is Roof Flashing?

Roof flashing is a small elements of a roofing system. But, it does a significant waterproofing job. Flashing is designed primarily to prevent water from getting into the house through the gaps on the roof. It is estimated that 90 per cent of roof leaks are due to faulty flashing.

Different types of roof flashing protect different areas of the roof. But whatever type they may be, their main function is to redirect water away to prevent leak and damage. Roof flashing is applied to the corners and valleys of the roof, as well as to any object that projects outward from the roof.

Roof flashing comes in a variety of materials, such as:

  • Aluminium — a commonly-used flashing material. It is lightweight, durable, cheap and easy to apply. It is typically coated to protect it against corrosion.
  • Lead — soft and pliable, lead is one of the oldest flashing materials used for roofing. It is durable and often used for chimneys due to its reliable protection against water seepage. However, lead comes with health risks and is no longer used as often.
  • Copper/Lead Coated Copper — pliable, low-maintenance, solders well, and compatible with almost any wood preservatives, copper flashing is the most durable flashing material. It easily adapts to weather changes and lasts a long time, too.
  • Steel/Galvanised Steel — rust-resistant, easy to apply, and cheap, galvanised steel roof flashing is visually-appealing and can be painted on to meld with the rest of the roofing. It is not as durable a material, however, as others on this list. Thus, it is not recommended in regions with harsh weather conditions.
  • Plastics, Rubbers, and other Composite Materials — these are also cheap but may not be ideal for areas that experience extreme heat or cold. These can be made from recycled materials.

Certain building codes may require roofing professional to comply with specific standards for flashing. For example, flashing materials used must be manufactured in accordance with AS/NZS 2904. Check your local building codes to make sure your roofing system is compliant with the applicable regulations.

Different Types of Roof Flashing

How many types of roof flashing are there? Well, there is one type for every part of the roof — which is a lot! There’s even a flashing for flashing.  All the different types work together. Know more about the key types of roof flashing below:

Continuous/Apron Flashing

This flashing works like an apron between the roof slope and a vertical wall or roof penetration. It consists of a long piece of metal with expansion joints. Its purpose is to redirect water away and carry it down to the shingles.

Step Flashing

This consists of a rectangular metal bent at 90˚ in the centre for a roof-to-wall application. Protecting the transition spots between the roof and wall, this flashing is laid in “steps” — that is, in layers overlapping 2 inches. It redirects water into the gutter. If one layer fails to do its job, the one beneath it will carry on the task.

Base Flashing

Base flashing works with another flashing type, the counter flashing, to effectively seal the vertical and horizontal intersection of the roof. It is typically used for chimneys and walls or parapets. This flashing keeps water from penetrating the roof deck.

Counter Flashing

This flashing complements the base flashing and is entrenched into the masonry to prevent water from getting behind the base flashing. It is also known as cover flashing or cap flashing.

Drip Edging

Applied on a roof’s eaves, this flashing guards against the water seeping underneath the shingles in case of an overfilled gutter. Without it, water can get into your home and damage the roof deck, wood fascia board, drywall, and other roof parts.

Vent Pipe Flashing

This is a special flashing that has a cylindrical body with a flange at the bottom which is fitted over pipes. It prevents water from slipping around the pipes or flues.

Valley Flashing

Shaped like a V or W, valley flashing is placed atop the roofing felt where one of the most critical water leaks can happen — the roof valleys. The roof valley is where two segments of the roof meet forming a dip or a valley. This flashing type guides water down the roof and straight into the gutter.

Saddle Flashing

Also referred to as joist saddle flashing, this is placed over joists, beams, or other protrusions through the cladding.

Common Applications of Roof Flashing

Roof flashing is found all over the roof. These are the crucial areas where flashing is required:

  • Roof valleys and joints — there are prone to water penetration due to the angles that can easily collect water.
  • Roof protrusions — these are anything that juts out of the roof such as plumbing pipes, satellite poles, and dormers. Pipe boots fitted around the pipe can help keep water from slipping in.
  • Chimneys — flashing around chimneys prevents water from collecting and leaking at the base of the chimney.
  • Skylight — there are skylight installations that come with built-in flashing. Without it, roofing professionals purchase or create flashing for skylights, as this area can be notorious for leaks. Flashing for skylights typically consists of continuous flashing, step flashing, and finally, saddle flashing.
  • Roof edges — flashing around these areas help secure the roof against leaks by directing the water off the roof.
  • Kickouts — roofing professionals apply kickout or diverter flashing to reroute rainwater that falls at the lowest point of the joint between the roof and wall and into the gutter.
  • Roof ridge — flashing is applied to cover the roofing material. It secures the roof apex from water penetration due to rainwater falling at an angle.

When to Call for Professional Roof Flashing Service

Roof flashing is essential for weatherproofing every part of your roof that is vulnerable to leaks. Flashing also provides aesthetic appeal and creates a sharp, seamless finish on the roofing job. It is essential to pay attention to roof flashing during routine maintenance.

Over time, flashing can get damaged and may need replacement. If left unfixed, there may be serious water leak damage that can be quite costly to repair. When you notice signs of damage like holes, corrosion, dried out sealant, or flashing that has bent or come loose, it’s time for a roofing service.

When it comes to roof flashing, you can trust the high-quality products and services from Sydney Roof and Building Supplies. We carry different ranges of flashing for your roof. Contact us so we can discuss how we can help with all your roofing needs.

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Basic Roof Maintenance You Can Do Yourself

Basic Roof Maintenance You Can Do Yourself

These roof maintenance tips can help you save money now and in the long run.

Your home’s roofing protects you from different harsh environment conditions like heavy rains, strong winds, and extreme heat of the sun. Regardless of the season, your roof is exposed to extreme hazards that may cause damage if it’s not given the proper maintenance it needs. Neglecting these roof hazards may result in:

  • Corrosion
  • Denting
  • Scratching
  • Leaking

If not mitigated, you will be left with no other option but to replace your roof.

Fortunately, there are things you can do to maintain your roof without the cost and hazards. After all, hiring a roofer can result in exorbitant fees, and it might not be the safest right now given the COVID-19 pandemic. If you can take care of these issues yourself, you can avoid putting your roof and yourself in a dicey situation.

Here are some basic roof maintenance tips to keep in mind. Just a caution: always take appropriate safety measures in whatever you do! If in doubt, have a licensed roofing specialist do it for you.

Regular Roof Inspection

A regular roof inspection can be quite helpful in knowing the status of your roof and the potential problems that might eventuate. The roof’s surface can be damaged by several factors, such as exposure to the extreme heat of the sun, presence of water, and accumulation of debris falling from nearby trees.

It is imperative to check the gutters for shingle granules as these are an indication that your roof is starting to wear and needs extra care. You also need to check the roof for the presence of algae or fungi, which could cause damage to the roof if they remain overlooked.

A study on roof weathering revealed that algae commonly grows on the surfaces of roof materials, which include asphalt shingles, concrete and clay roof tiles, and even slate. Moss, lichens, and algae can all build up on a roof.

Metal roofs, on the other hand, are prone to rusting due to harsh weather conditions and the presence of elements like iron oxide. Rust may result in corrosion and can cause leaks that are detrimental to your home.

Washing Off the Damage-Causing Elements

Clearing off hazardous elements from your roof will surely extend its life. Common elements that find their way on to your roof include dirt, leaves and twigs, water, acid rain, and mould. These elements should be eliminated as soon as possible before they cause damage to your roof.

· Using water

You can use plain water to get rid of the accumulated dirt on your roof. You may use a bucket to splash water and wash off the dirt, or you can take advantage of your hose to make it easier for you. Using a hose can be awkward, but it is much more effective because the water pressure is stronger and controllable.

· Using detergents

Most people prefer using detergents on their roof because these materials are readily available in their homes. You can use mild laundry detergents and dish soap or other commercial detergents like those for cars. Just make sure they are mild as there are detergent types that can damage to your metal roof.

· Using solvents

Sometimes, water may not be enough to eliminate the hazards that accumulate on your roof. For tougher elements like oil, grease, tar, and rust, you can use solvents. But bear in mind that solvents should only be used to clean a portion of the roof. Avoid applying them to the whole roof as their strong chemical content could be dangerous to living things. Also, to protect yourself from harmful chemicals that come with these solvents, you must wear eye protection such as safety glasses.

Brushing the Gutters

Gutters are usually where debris like leaves, twigs, and algae accumulate. You have to regularly check the gutters to prevent them from clogging. Cleaning the gutters is something you can do yourself if you have the right tools.

Necessary tools like a brush and a ladder should be available at the hardware. Just place the ladder on one spot at a time, so you can start clearing the gutters of any debris.

Debris like twigs and leaves that collect in the gutter can block the waterway and prevent the water from going to the downspout. A high volume of water build-up could overflow on the gutter or come back up the shingles and down your house. It’s something you want to avoid.

Monitoring the Pipe Jacks

You have to pay close attention to your pipe jacks. A pipe jack is simply a flashing that sits at the base of any pipe that comes out of the roof. The flashing may start degrading over time due to harsh conditions. When broken, this can cause water leaks to enter through your roof.

Moreover, the rubber on the base of the pipe may start to contract and pull away from the pipe, which will cause leakage inside your house. It’s best to keep an eye on your pipe jacks to prevent further damage.

Check for Exposed Nail Heads

Nailheads are usually visible on your roof, especially on the flashings, at the bottom of the pipe jacks, or the ridges. Your roof is going to have exposed nails, especially on the flashings. These nail heads should not be exposed and should be sealed to prevent water from entering the shingles to the wood decking and your attic.

Use silicon coverage products to seal off these nail heads. You can find these products in hardware stores.

Keep Valleys Clean

A valley is where two downward-sloping roof pitches intersect. Although most modern houses do not have exposed valleys, some still do. Open valleys can accumulate twigs and debris that may cause clogging and rusting, so it is important that you clear out the valleys from time to time.

Check the Flashing and Seals on Skylights

Some houses have skylights that give natural light to a room. This part of the roof, however, is not immune to the accumulation of dirt and debris and also needs special attention. A skylight will have a flashing at the top and the bottom.

For the bottom part, you should check out the exposed nails and make sure that they are properly sealed off. The flashing along the side and the top of the skylight should be maintained well because this is where dirt and debris collects.

The seal between the frame of the skylight and the glass can degrade over time, which may cause water to enter through the roof. Check your skylight from time to time as you might need to have it resealed if the initial seal has degraded.

Get the best roofing materials from Sydney Roof and Building Supplies.

Your roofing serves as your protection from the effects of global warming — the extreme weather conditions and high temperatures, among others. That is why it’s important to keep it well-maintained. A lot of hardware stores offer roofing materials, but for some of the best for maintaining your roof, Sydney Roof and Building Supplies is your one-stop-shop!

SRBS has a wide array of roofing supplies for all your roofing needs. We stock high-quality roof materials that have been tested and proven to be quite effective by Sydneysiders. From cowls, fixings and fasteners, flashing, paints, gutter to hand tools and workwear, we have them all for you! Call us on 02-8090-3483 or email us at mark@srbs.com.au or at marie@srbs.com.au to enquire about our products and services.

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