How to Install Kickout Flashing on Existing Roof: StepbyStep Guide for Reliable Waterproofing
How to Install Kickout Flashing on Existing Roof?
To install kickout flashing on an existing roof, start by removing the shingles surrounding the old flashing.
Next, install the kickout flashing at the end of the roof-wall intersection to divert water away from the wall and into gutters.
The kickout flashing should be large enough to handle expected stormwater flows.
Make sure to follow design professional and local building code requirements for the height of the flashing.
Install the first row of shingles and the next section of sidewall flashing over the up-slope edge of the kickout diverter, with a minimum 4-inch overlap.
Install the remaining sidewall flashing, counter flashing, and shingles according to the manufacturer’s instructions.
Apply self-adhesive flashing over the top edge of the wall flashing, diverter, and any rigid foam insulation.
Use construction tape over the self-adhered flashing, and then install siding over the rigid foam insulation.
It is important to properly integrate the flashing and diverters with housewrap, cladding, and gutters to prevent water damage.
Key Points:
- Remove shingles surrounding old flashing
- Install kickout flashing at end of roof-wall intersection
- Ensure kickout flashing can handle stormwater flows
- Follow design professional and building code requirements for flashing height
- Install shingles and sidewall flashing with minimum 4-inch overlap
- Apply self-adhesive flashing and construction tape, then install siding over foam insulation
Did You Know?
1. The concept of kickout flashing was first introduced in the 1980s as a solution to prevent water infiltration in homes with sloped roofs and wall systems.
2. Kickout flashing is typically installed at the lower edge of a roof-to-wall intersection, redirecting water away from the vertical wall and preventing it from penetrating into the building envelope.
3. The name “kickout” refers to the distinct angled shape of the flashing that effectively “kicks out” the water, directing it away from the vulnerable area.
4. Kickout flashing is commonly used in regions prone to heavy rainfall or where wind-driven rain is prevalent, helping to protect the structure from potential water damage.
5. Installing kickout flashing correctly requires careful attention to detail and precision to ensure its effectiveness. It is crucial to follow industry standards and guidelines to achieve a proper installation.
Importance Of Flashing: Preventing Water Ingress And Channeling Away From Homes
Flashing is essential for protecting roofs and homes from water damage due to rain or melting snow. It acts as an impermeable barrier to prevent water from penetrating the roof system and directs it away from the house. Insufficient flashing can result in water seepage into the structure, leading to expensive repairs and potential health hazards from mold and mildew.
One commonly used type of flashing is L-shaped flashing, which tightly wraps around the side of the roof and has a flared base to divert water from the siding. However, for existing roof installations, a more suitable option is T-shaped flashing. This type of flashing attaches to the roof and extends outward, with a downward projection away from the home. The design of T-shaped flashing makes it more effective in redirecting water away from the wall and into the gutters.
L-Shaped Vs. T-Shaped Flashing: Choosing The Right Option For Existing Roof Installations
When it comes to installing flashing on an existing roof, T-shaped flashing is the better option compared to L-shaped flashing. This design allows for a more secure and efficient installation process.
L-shaped flashing, as mentioned earlier, hugs the side of the roof tightly and has a flared base to push water away from the siding. While it is effective for new installations, it can be challenging to install on existing roofs without removing a significant portion of the roof cladding.
On the other hand, T-shaped flashing attaches to the roof and projects outward, with a downward projection away from the home. This configuration makes it easier to install by attaching it to the existing roof without the need for extensive removal of shingles or siding. Additionally, T-shaped flashing provides better water diversion, ensuring that water is directed away from the roof-wall intersection and into gutters.
- T-shaped flashing is recommended for installing flashing on existing roofs
- L-shaped flashing is more suitable for new installations.
Installation Steps: Removing Shingles And Re-Laying After Flashing Installation
Proper installation of kickout flashing on an existing roof involves several steps to ensure a secure and reliable waterproofing solution. Here is a step-by-step guide on how to install kickout flashing:
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Start by removing the shingles surrounding the old flashing. Carefully lift the shingles using a pry bar or shingle removal tool, ensuring not to damage them.
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Once the shingles are removed, prepare the area where the kickout flashing will be installed. Make sure the surface is clean and free from debris.
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Take the kickout flashing and position it at the end of the roof-wall intersection. The kickout flashing should be large enough to handle expected stormwater flows.
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Secure the kickout flashing by fastening it to the roof deck using roofing nails or screws. Ensure that it is flush against the sidewall and tightly sealed to prevent water leaks.
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Re-lay the shingles that were previously removed, making sure they overlap the kickout flashing by a minimum of 4 inches. Follow the manufacturer’s instructions for proper shingle installation.
Note: It is important to remember that kickout flashing plays a crucial role in preventing water damage to your home. By diverting water away from the vulnerable roof-wall intersection, it helps maintain the integrity of your roofing system.
By following these steps, you can ensure that the kickout flashing is installed correctly on an existing roof, providing effective water diversion and preventing water damage to your home.
- Elevate the shingles carefully using a pry bar or shingle removal tool.
- Clean and prepare the area for kickout flashing installation.
- Choose kickout flashing that can handle expected stormwater flows.
- Securely fasten the kickout flashing with roofing nails or screws.
- Overlap the kickout flashing with shingles by a minimum of 4 inches.
Pre-Formed Flashing Options: Step Flashing, Vent Pipe Flashing, And Valley Flashing
Flashing plays a crucial role in ensuring a watertight roof system. Here are the three commonly used pre-formed flashing options:
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Step flashing: This type of flashing is installed at joints or edges, such as where the roof meets sidewalls. It consists of small, stepped pieces of metal that overlap to keep water from entering the walls. Step flashing is vital for maintaining a watertight roof.
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Vent pipe flashing: Used to seal around vent pipes protruding through the roof, vent pipe flashing creates a waterproof barrier and prevents water from entering the roof system through gaps. It is available in different sizes and styles to accommodate various types of vent pipes.
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Valley flashing: Roof valleys, where two roof planes intersect, can cause water to flow into the roof. Valley flashing directs the water away from the roof and into the gutters, preventing pooling and potential leaks. It is a critical component for maintaining a dry and sturdy roof structure.
Choosing the appropriate pre-formed flashing option for your specific roofing needs is essential to ensure proper water diversion. This helps prevent water ingress and potential damage to your roof.
To summarize, different styles of pre-formed flashing, including step flashing, vent pipe flashing, and valley flashing, address various roofing needs and contribute to the overall integrity of a watertight roof system.
- Step flashing is used at joints or edges to prevent water from entering the walls.
- Vent pipe flashing creates a waterproof barrier around vent pipes.
- Valley flashing directs water away from roof valleys to avoid pooling and leaks.
“By choosing the appropriate pre-formed flashing options for your specific roofing needs, you can ensure proper water diversion, preventing water ingress and potential damage to your roof.”
Kickout Flashing: Diverting Water Away From Roof-Wall Intersection Into Gutters
Kickout flashing is a crucial component in diverting water away from the roof-wall intersection and into gutters. It is typically installed at the end of the roof-wall junction to ensure proper water management and prevent water from infiltrating the wall.
To effectively divert water, the kickout flashing should be large enough to handle expected stormwater flows. It should be positioned flat on the roof, flush against the sidewall, and securely fastened and sealed to the roof deck and starter strip.
The first row of shingles and the next section of sidewall flashing should be installed over the up-slope edge of the kickout diverter, with a minimum overlap of 4 inches. The height of the sidewall flashing should meet design professional and local building code requirements.
Properly installed kickout flashing ensures that water is directed away from the vulnerable roof-wall intersection and channeled into the gutters, protecting your home from potential water damage.
- Kickout flashing diverts water away from the roof-wall intersection
- It should be large enough to handle stormwater flows
- Position it flat on the roof and flush against the sidewall
- Securely fasten and seal it to the roof deck and starter strip
- Install first row of shingles and sidewall flashing over the up-slope edge with a minimum overlap of 4 inches
- Height of sidewall flashing should meet design professional and local building code requirements
6. Proper Integration: Flashing And Diverters With Housewrap, Cladding, And Gutters
To achieve reliable waterproofing and prevent water damage, it is crucial to integrate the flashing and kickout diverters with other components of the roofing system.
For houses with rigid foam insulation sheathing, the drip edge and roof underlayment should be applied over the roof deck and continue lapping up the sidewall and over the water-resistive barrier (rigid foam insulation) by a minimum of 7 inches. This integration ensures that water does not penetrate the insulation and reaches the kickout flashing for proper diversion.
For houses with housewrap over oriented strand board (OSB) or plywood sheathing, the drip edge and roof underlayment should be applied over the roof deck, and the underlayment should continue lapping up the sidewall and over the weather-resistive barrier (housewrap) by a minimum of 6 inches. This integration provides a solid barrier against water infiltration and directs water into the kickout flashing.
Additionally, self-adhesive flashing should be applied over the top edge of the wall flashing, kickout diverter, and rigid foam insulation to ensure a complete seal and prevent any potential water leakage.
Construction tape should be applied over the self-adhered flashing, and siding should be installed over the rigid foam insulation to further protect the home from water damage.
By properly integrating the flashing and diverters with housewrap, cladding, and gutters, you can ensure a reliable and waterproof roofing system that effectively channels water away from your home.
the installation of kickout flashing on an existing roof is a critical step in maintaining a watertight and secure roofing system. By following the necessary installation procedures, considering the appropriate pre-formed flashing options, and ensuring proper integration with the rest of the roofing components, you can protect your home from water ingress and potential damage. Remember that properly installed flashing and diverters are essential in preventing water leaks and maintaining the structural integrity of your roof.
Frequently Asked Questions
Can you add flashing to an existing roof?
Adding flashing to an existing roof is indeed possible, but it would involve some necessary steps for proper installation. Firstly, the shingles surrounding the old flashing would need to be carefully removed to create space for the new flashing. Once this is done, the new flashing can be securely installed using roofing nails and roofing cement. Afterward, the shingles would need to be re-laid to effectively seal the flashing and maintain the integrity of the roof. This process ensures that the new flashing is properly integrated into the existing roof structure, providing the required protection against water infiltration and potential damage.
Where do you use kickout flashing?
Kick-out flashing is a crucial component to be used at the end of a roof-wall intersection in order to redirect water away from the wall and into gutters. This helps prevent water damage and maintain the integrity of both the roof and the wall. By ensuring that the kick-out flashing is properly sized to accommodate anticipated stormwater flows, it guarantees efficient water diversion, minimizing the risk of erosion or leakage.
What type of flashing is installed over existing flashing?
In order to ensure a watertight seal and prevent leaks, reglet flashing is commonly installed over existing flashing. This type of flashing is specifically designed to fit into a groove or reglet in the masonry wall. By covering the top of the existing flashing, reglet flashing provides an additional layer of protection against water infiltration, redirecting any water flow away from potential entry points and maintaining the integrity of the roofing system.
What are the steps to properly install kickout flashing on an existing roof without causing damage or compromising the integrity of the structure?
The first step to properly install kickout flashing on an existing roof without causing damage or compromising the structure is to carefully remove the shingles or roof tiles in the affected area. This can be done by using a pry bar and being cautious not to damage the surrounding materials.
Once the area is cleared, the next step is to properly measure and cut the kickout flashing to the correct size. It should be large enough to divert water away from the wall but not too large that it becomes obtrusive. The flashing should be installed at a downward angle towards the gutter, ensuring a seamless connection with the existing roof and siding. Finally, the flashing should be securely fastened to the wall using appropriate screws or nails, and then the shingles or roof tiles can be replaced, ensuring they overlap the flashing to provide additional protection against water intrusion. By following these steps diligently and being mindful of the proper installation techniques, kickout flashing can be installed successfully without causing damage or compromising the integrity of the structure.