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Our experience is improper apron flashing is in the top five roofing issues as it pertains to additions.  Be it brick or siding,  proper apron flashing is imperative and most general contractors don’t do it properly.  The apron flashing should be a monolithic piece of metal and go under the siding or through the brick to provide real security against the elements.  We normally see a poor caulk job and no through wall flashing on repair calls for issues like this.  If your addition is leaking at the area where it connects to the home,  this is in the short list of things to look for.

Apron Flashing

Apron Flashing


Why Apron Flashing Is the Best Way to Protect Your Roof

Apron flashing, a flashing apron, is a construction technique used to waterproof the intersection between a wall and a roof or upper floor. It is necessary to protect the structure from water damage, especially in regions with adverse weather conditions and large amounts of precipitation. Apron flashing is installed beneath the roof or upper floor at a 45-degree angle to direct the flow of rainwater away from the structure. The installation of apron flashing should be carried out by an experienced professional who understands the complexities of this process. Doing so will ensure that your home is safe from water damage and looks aesthetically pleasing.

Types of Apron Flashing 

Apron flashing can be made from various materials, such as copper, aluminum, PVC, lead, and rubber. Choosing a suitable material is essential as the material must be durable, flexible, and resistant to the elements. Copper and aluminum flashing are the most common as they are affordable, lightweight, and resist the elements. PVC and lead flashing are popular choices, offering excellent waterproofing capabilities and durability. Ultimately, the choice of material depends on the structure’s specific needs and the homeowner’s budget.

Why Apron Flashing is installed on a roof

Apron flashing is installed on a roof to provide a waterproof seal around the intersection between a wall and a roof or upper floor. In many climates, the combination of dust, pummel, snow and other elements can start to erode the roof and eventually penetrate the structure, leading to water damage. The liquid is diverted away from the area and directed toward the ground by installing apron flashing, ensuring that the roof remains structurally sound and free of water damage. Additionally, this technique also adds to the home’s aesthetic appearance as the flashed corners are seamlessly woven into the overall design of the residence.

Installation of Apron Flashing 

When installing apron flashing, following a few key steps is essential. Begin by determining the angle of the apron flashing for a 45-degree tilt and cutting it to the correct length. After that, the material for the flashing must be cut and pre-formed to fit the exact shape of the area. Then, the apron flashing must be nailed or screwed to the structure, ensuring that all edges are securely attached. Additionally, a sealant should be applied along all edges of the flashing to ensure it is properly sealed and watertight. With the installment of apron flashing, you can protect your home from water damage for many years.

Benefits of Apron Flashing

Installing apron flashing to your roof offers many advantages. First, apron flashing helps to protect the structure from water damage, increasing the lifespan of the home and saving you money on costly repairs. It also adds an aesthetically pleasing element to the structure, enhancing your home’s exterior look. Finally, when properly installed, apron flashing can be highly durable and resilient, making it an excellent investment for homeowners in adverse weather conditions.

In addition to the benefits of apron flashing, it is essential to remember that regular inspections and maintenance are necessary to ensure proper functionality. Although apron flashing is designed to protect against water damage, it might not be effective if there are any signs of wear or tear. It is, therefore, important to check the flashing regularly and ensure no gaps or cracks. If any minor damage is spotted, it should be addressed as quickly as possible to prevent any further damage to the roof or structure. Regular inspections also help to ensure that the flashing remains watertight and performs its intended function.

Overall, apron flashing is a great way to protect your home from water damage and add some beautiful detailing. Not only does it safeguard the structure from water entering the home, but it also enhances the residence’s aesthetic appeal. Proper installation and routine inspections allow one to enjoy a long-lasting and reliable roof-flashing system for many years.

Maintenance of Apron Flashing

To ensure that your apron flashing remains functional and provides long-term protection against water damage, it is vital to check the flashing regularly. Look for any signs of wear or degradation, such as cracks or gaps, and seal any areas that may be compromised. Additionally, it is essential to check for any debris or dirt buildup which can hinder the performance of the flashing. Finally, checking that the flashing remains secure is essential to prevent water penetration. Regular maintenance of the apron flashing will ensure it remains effective in protecting your home from water damage.


The technique of Apron Flashing for Roofs has been successfully proven to be a reliable and cost-effective way to ensure the durability of a roof. It is a great way to seal the home’s roof from the elements. This technique ensures that water, snow, wind, and other debris cannot seep into the home and damage the roof. Properly installing and maintaining the apron flashing for the roof can help your home last for many years.