Building codes may demand your roofing professional use a specific material for flashing. They may also list a minimum thickness. Most building codes require gauge galvanized steel as a minimum. In fact, if you live in Florida, you may find that your building codes call for a special flashing material, modified bitumen roofing tape:.
When you install roof flashing, you will need to use a sealant. While roofing professionals occasionally use nails when flashing, they must choose whether to nail to the roof plane or the vertical wall.
If nailed to both, the flashing may deform under the pressure from shifting brick or wood. When nailed only to the roof plane or vertical wall, the flashing can stay in place while the other building materials expand and contract throughout the seasons. Roofing cement : Roofing cement creates a waterproof seal. Roofing professionals usually apply it with a trowel. Before you learn how to install roof flashing, you need to understand that there are three primary techniques, each suitable for different areas on the roof.
Disclaimer : Roof flashing should always be installed by professional roofers, who understand best practices, safety requirements and the building codes and laws in their area. These instructions are only to help homeowners understand what to expect from their roofing professional.
Step flashing is the most time-consuming of all flashing jobs on the roof because you must complete it step-by-step as you shingle up the roof.
There are a few general best practices you need to know. First, step flashing must be installed before the siding, so that the siding can cover the top of the flashing. If this is a repair job, the siding must also be removed and replaced with the flashing. Also, before you start installing your flashing, you need to look to see if the wall in question has a corner on the roof face, as in the image below. If it does, follow our first installation procedure. If a wall corner is on the rooftop, you will need to create a corner flashing piece using a typical step flashing piece.
These instructions will tell you how to create a corner piece and how to install step flashing generally:. Instead, you will need to install kickout flashing to help guide the water into the gutter. Instead, buy a premade kickout flashing piece. Chimney flashing should be installed at the same time the mason is laying the brick and mortar, or the roofer will have to cut a ridge out for the counter-flashing. Then, the roofer will have to seal this indent up, after placing the flashing.
Installing a roof plumbing vent is typically an easier task than flashing a chimney. Here is how you do it:. Do you need information about how to install the other kinds of roof flashing? IKO has already explained how to install drip edge flashing and how to install metal valley flashing. On a typical re-roofing job, where you are replacing an old or underperforming roof, it is wise to replace all flashing.
However, there are limited circumstances where a roofer may decide to reuse flashing. For example, if a roofer is doing a repair job on a relatively new roof and the flashing appears to be in good condition, it may be salvaged.
To decide whether or not your flashing can be reused, your roofer will need to remove the flashing carefully to prevent damaging it. Your roofer will then inspect it before deciding to reuse it.
If your roofer is replacing the shingles around your flashing, the flashing must be removed, at least temporarily, to allow for proper installation. Some types of flashing, like step flashing, may be more challenging to reuse because it is harder to separate from the old shingles without denting or otherwise damaging it. Typically, a roofer will replace step flashing on a new roof.
Also, your roofer should not layer new flashing on top of the old flashing. You should only have one layer of flashing on a roof at a time. You might also wonder what damaged flashing looks like and when it should be replaced.
Check over your flashing and look for:. That depends on a few factors. If the original flashing is in good condition and can be removed without damaging it, it is possible to reuse it. Fixing roof flashing, just like installing flashing, is best left to roofing professionals. You should not take risks with your roof. A professional can help you solve all of your roof flashing problems or answer the questions you have about your specific roof.
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Learn more. Tour our virtual showroom now to browse our range of products and options. Explore the Showroom. View more. Download Revit and CAD files, detailed technical drawings and more. Nothing beats seeing our products in person, find a display near you. Regardless of the type or material you choose, window flashing is inexpensive, easy to install, and can save you substantial amounts of money by protecting against the costly impacts of water damage or penalties for non-compliance.
However, for many builders, flashing is misunderstood. Did you know: The Victorian Building Authority and private inspectors are spending more time and energy looking for instances of non-compliance due to missing window flashing. This is due to widespread confusion around the requirement for flashing and high levels of known non-compliance.
Although there are many different types of flashing, they all achieve the same purpose. Flashing is designed to waterproof a window and protect against rainwater damaging the internal building fabrics of your home. In most cases across the east coast of Australia, homes consist of a timber frame with cladding on the outside—whether brick veneer, weatherboard, or other materials—with a waterproof building wrap between the timber and the cladding.
Unfortunately, the results are fairly poor. If a small section of the roofing cement fails, then the entire continuous flashing is compromised, and you have a leak that easily spreads. If your roof has been installed using continuous flashings, you may want to get it replaced soon with something more reliable, like step flashing.
Also called diverter flashing, kickout flashing works to divert rainwater and moisture away from the cladding of your home and into the gutter system. When kickout flashing has been installed correctly, it does a great job of preventing unwanted water penetration.
It ages more gracefully by forming a green patina over time and still tends to look great with different roofing types. Steel flashings usually have a zinc coating to protect them against corrosion, allowing them to last much longer under exposure to moisture and other weather elements. Lead is actually a very durable material for flashings, and many prefer it right behind copper. Lead flashings are believed to last for more than years, so they should be fine to last the entire lifespan of your roof.
This is a relatively inexpensive flashing material while also being malleable and durable. It does need a protective finish, however, since it corrodes easily when exposed to weather elements, wood, cement, or concrete. That being said, many flashings outlive the normal lifespan of a roof and can be reused. Many roofing contractors will even recommend you reuse your roof flashings since they are designed to last and are often in fine condition.
Contact Long Home Products at or visit us online to request an estimate. A licensed professional will come to your home for a free, no obligation assessment to replace your old roof with a beautiful new roof with up to a year warranty!
Interested in Long Home Products? See our special offers now. The most elegant expression of this concept is a flashing see Roof to Wall Flashing with Foam Sheathing.
Flashings are the most under-rated building enclosure component and arguably the most important. Flashings are integrated with drainage planes creating, for all practical purposes, a flashing for the entire assembly. Flashings are needed wherever a drainage plane is terminated as at a roof edge or bottom of wall, or interrupted as at openings, intersection of assemblies, control joints, or penetrations of the drainage plane.
Flashings must not direct water onto another building element in a way that concentrates moisture loading.
Flashings are about reducing moisture loading on the building enclosure. Stepped flashing is used where a sloped shingled roof intersects a vertical wall. Step flashings are interwoven with the shingles and act essentially as shingles with an upturned leg to allow a transition of the vertical drainage plane of the wall to the drainage plane of the roof.
The upturned leg of the step flashing is behind the vertical drainage plane or sealed to it with adhesive membrane and sheathing tape.
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