Kick Out Flashing: How to Install With Lowe’s Materials

Kick-out flashing is a critical detail where a roof edge meets a wall, redirecting water away from the wall and into the gutter. Proper installation prevents leaks and wood rot, especially in areas with heavy rainfall or snowfall. This guide explains what kick-out flashing is, why it matters, and how to install it using common Lowe’s materials. It covers step-by-step instructions, best practices, and maintenance tips to ensure a durable, weather-tight connection.

What Is Kick-Out Flashing And Why It Matters

Kick-out flashing, also called kick-out or diverter flashing, is a short piece of metal or flexible flashing installed where a roof edge meets a wall. It deflects roof runoff away from the wall and toward the gutter. Without kick-out flashing, water can wick into siding, trim, or the wall sheathing, leading to mold, rot, and costly repairs. Proper installation creates a continuous moisture barrier and extends the life of the roofing and siding systems.

Materials You’ll Need From Lowe’s

• Low-Profile Flashing or Adjustable Kick-Out Flashing (galvanized steel or aluminum)
• Self-Adhered Roofing Underlayment (where appropriate)
• Elastomeric Roof Sealant or Polyurethane Sealant
• Butyl Tape or Waterproof Tape for seam sealing
• Butyl Rubber Roofing Tape (for added seal)
• Metal Snips, Hatchet, and Snips for cutting
• Lint-Free Cleaning Cloths and Solvent
• Roofing Nails or Screws Compatible with Flashing
• Safety Gear: gloves, eye protection, and a sturdy ladder

Step-By-Step Installation Overview

Before starting, verify roof pitch, wall siding type, and compatible flashing materials. Ensure the area is dry and free of debris. Follow local building codes and manufacturer instructions for flashing installation. The process below provides a practical workflow that can be executed with Lowe’s materials.

Prepare The Roof Edge And Wall Interface

Clean the edge where the wall meets the roof. Remove loose shingle granules and dirt. Cut the kick-out flashing to fit the corner and angle needed to direct water away from the wall. If using flexible flashing, shape it to the roof slope and wall intersection. Secure underlayment if required by your roof assembly, ensuring a continuous water barrier.

Install The Kick-Out Flashing

Position the kick-out so the lower leg points toward the gutter and the short leg sits behind the wall edge. Nail or screw through the upper part of the flashing, leaving the lower edge free to bend toward the gutter. If you’re using metal, crimp or fold the flashing to create a tight bend where the roof meets the wall. For flexible flashing, secure with sealant along both joints to prevent air and water intrusion.

Seal Joints And Transitions

Apply a bead of high-performance sealant along both sides of the kicker and where it meets the wall and roof. Press the sealant firmly to ensure a watertight seal. Use butyl tape on seams for additional protection, and cap with a flashing bead to lock in moisture resistance. Wipe away any excess sealant for a clean finish.

Final Inspection And Test

Inspect the installation for any gaps or loose fasteners. Run a light water test from a hose at low pressure to verify that water flows into the gutter and not behind the flashing. Check that the kick-out directs water away from the wall and that the sealants remain intact after the test. Address any leakage points promptly.

Using Lowe’s Products For Durability

Lowe’s carries a range of flashing options designed for different siding materials and roof types. Choose galvanized steel or aluminum flashing for durability and corrosion resistance. For homes in coastal or humid climates, aluminum flashing offers excellent corrosion resistance. Elastomeric sealants from Lowe’s provide flexibility to handle temperature changes without cracking. When selecting materials, ensure compatibility with existing roof underlayment and siding to maintain a seamless moisture barrier.

Common Mistakes To Avoid

• Not extending the kick-out far enough to divert water into the gutter.
• Using undersized or damaged flashing that cannot handle high runoff.
• Failing to seal joints thoroughly, creating hidden leaks.
• Ignoring building code requirements for flashing at wall penetrations.
• Cutting flashings on-site without clean edges, which creates gaps.

Maintenance And Inspection Tips

• Inspect kick-out flashing annually, especially after severe weather.
• Look for rust, loose fasteners, or sealant cracks and repair as needed.
• Clear gutters regularly to prevent water backup that can overwhelm the kicker.
• Reapply sealant every few years or as recommended by the product manufacturer.

Safety Considerations

Always follow ladder safety guidelines and wear protective gear. When working on a roof, avoid windy conditions and use fall protection if required by local regulations. If the roof pitch is steep or the work area is difficult to access, consider hiring a licensed contractor.

Quick Reference: Key Steps In One View

• Prepare the edge and wall interface
• Cut and fit kick-out flashing to the required angle
• Secure and seal joints with high-performance sealant
• Test water runoff and inspect for leaks

Kick-out flashing is a small but essential detail in roofing that prevents costly water damage. By selecting compatible Lowe’s materials and following a careful installation process, homeowners can achieve a durable, weather-tight connection between roof and wall. Regular maintenance and attentive inspections will help maintain the effectiveness of the kick-out flashing for years to come.