What Is Kick Out Flashing and Why Is It Important on Roofs?
Kick out flashing is a specialized piece of metal flashing installed where a roof meets an exterior wall, usually near the gutter line. Its primary function is to direct water away from the wall and into the gutter, preventing water from seeping behind the siding or roofing materials. Without properly installed kick out flashing, water can infiltrate under shingles or siding, leading to structural damage, mold growth, and costly repairs. This simple yet crucial component plays a significant role in protecting the integrity of roofing systems and the building envelope.
Key Components and Design of Kick Out Flashing
Kick out flashing typically consists of durable metal materials like aluminum, galvanized steel, or copper. It is custom-shaped to create an angled “kick” that channels water efficiently into gutters. The design usually includes:
- A vertical flange: attached to the wall underneath the siding or cladding.
- A horizontal flange: tucked under the roof shingles or roofing membrane.
- An outward-angled “kick”: deflects water toward the gutter, away from the wall’s base.
This design prevents water from running down the wall and causing damage to the siding, framing, or foundation areas.
Where and When to Install Kick Out Flashing on Roofs
Kick out flashing is essential wherever a roof edge meets a vertical wall—commonly around:
- Sidewalls intersecting with the main roof.
- Chimneys or dormers.
- Where roof valleys meet exterior walls.
Building codes in many regions require kick out flashing for new constructions and roof replacements. It is critical during roofing projects to ensure effective drainage and prevent moisture buildup behind exterior siding and roofing materials.
Common Problems Caused by Missing or Improper Kick Out Flashing
When kick out flashing is missing, damaged, or poorly installed, water drainage can become compromised, leading to multiple issues:
- Water infiltration: Moisture can seep behind siding, causing wood rot and mold growth.
- Paint damage and peeling: Water running down walls damages paint and exterior finishes.
- Foundation damage: Improper water diversion can saturate soil near foundations, leading to structural problems.
- Gutter overflow and damage: Water missing the gutter can cause soil erosion and gutter system damage.
Ensuring proper kick out flashing helps avoid these costly and time-consuming repairs.
Step-by-Step Process to Install Kick Out Flashing on a Roof
Proper installation of kick out flashing requires skill and attention to detail. Follow these general steps to install or replace kick out flashing:
- Inspect the intersection: Remove any damaged siding or roofing materials near the wall-roof junction.
- Install the base flashing: Secure the vertical flange of the flashing onto the wall sheathing, sliding it under the house wrap or moisture barrier.
- Position the horizontal flange: Slide the horizontal part of the flashing under the roofing shingles or membrane.
- Create the “kick”: Bend the flashing outward at about a 45-degree angle towards the gutter.
- Seal and secure: Use roofing nails or screws and apply roofing-grade sealant along seams to prevent water intrusion.
- Replace siding and shingles: Carefully reinstall or replace any removed siding or shingles ensuring a watertight seal.
Professional assistance is recommended if unsure about handling roofing materials or cutting flashing accurately.
Materials and Tools Needed for Kick Out Flashing Installation
| Materials | Tools |
|---|---|
|
|
Maintenance Tips to Extend the Lifespan of Kick Out Flashing
To maximize the effectiveness and durability of kick out flashing, routine maintenance is essential. The following tips help maintain flashing and prevent water damage:
- Regular inspections: Check the flashing at least twice a year and after major storms for signs of damage or wear.
- Clean gutters: Ensure gutters are free of debris so water can drain properly and the kick out flashing functions optimally.
- Seal gaps promptly: Repair or reseal any cracks, gaps, or loose nails to avoid water penetration.
- Monitor siding and roof: Look for signs of water stains or mold near flashing areas as early warning signs of leaks.
Common Misconceptions about Kick Out Flashing
Despite its importance, kick out flashing is sometimes misunderstood or neglected. Common myths include:
- “Flashing isn’t needed if gutters are installed”: Gutters alone can’t prevent water from running behind walls; kick out flashing directs water correctly.
- “Any metal strip will work”: Properly shaped kick out flashing with correct angles is necessary to channel water effectively.
- “Flashing only matters for heavy rain areas”: Even moderate rainfall can damage structures without adequate flashing.
- “Flashing installation is a one-time job”: Ongoing maintenance is required to keep flashing functional.
How Kick Out Flashing Impacts Home Value and Building Longevity
Correctly installed kick out flashing contributes significantly to a home’s durability**, helping prevent costly water damage and deterioration over time. Homes with well-maintained flashing systems show better resistance to weather, which is an attractive feature for potential buyers and inspectors. Many building codes now mandate kick out flashing,** reflecting its critical role in structural protection.
During roof inspections, properly functioning kick out flashing can reduce the likelihood of repair recommendations and increase confidence in overall roof health, improving your property’s market value.