Kick Out Diverter Roofing: How to Install and Maintain
Kick out diverter roofing details are essential for directing water from a roof edge into a gutter, preventing water intrusion at the wall and reducing damage to siding and foundations. This article explains what a kick-out diverter is, why it matters, how to install it correctly, common issues, maintenance tips, and code considerations to help homeowners and roofing professionals achieve durable, watertight results.
What Is A Kick-Out Diverter And Why It Matters
A kick-out diverter, also known as kick-out flashing or a kick-out, is a small piece of metal flashing installed where a roof edge intersects a wall and a gutter. Its purpose is to channel roof runoff into the gutter instead of behind the wall sheathing or siding. Without a properly installed kick-out, water can wick into the wall, cause wood rot, and lead to mold, deteriorating fascia, and stained siding. In climates with heavy rain or snow, a correctly positioned kick-out diverter is a critical line of defense against water damage.
Key benefits include:
- Improved water management: Directs flow away from walls and into the gutter.
- Extended roof life: Reduces potential rot and decay at the roof-to-wall transition.
- Enhanced facade protection: Prevents water intrusion behind siding and trim.
- Compliance with flashing best practices: Aligns with modern roofing standards for step and continuous flashing systems.
When Kick-Out Flashing Is Needed
Kick-out diverters are typically used at roof edges where the gutter abuts a wall. They are especially important when the roof line meets an exterior wall with a clearly defined gutter, or where the drip edge is present but lacks adequate extension beyond the wall. Homes with hip or valley roofs that drain toward the gutter also benefit from properly installed kick-out flashing in regions prone to heavy rain or wind-driven water. Contractors should assess:
- Presence and condition of existing drip edge and gutter alignment
- Angle between roof plane and wall surface
- Material compatibility with surrounding siding and flashing systems
- Evidence of past water intrusion or staining at the wall line
Materials And Tools For Kick-Out Installation
Typical materials include:
- Kick-out Flashing: A 4- to 6-inch wide metal piece, commonly galvanized steel or aluminum, shaped to fit the roof edge and wall plane.
- Drip Edge: Provides a lip to direct water into the gutter and supports the kick-out.
- Underlayment or Roofing Felt: Helps seal the area beneath the flashing.
- Sealant/Caulk: Exterior-grade, paintable sealant to seam joints and seal fasteners.
- Galvanized Nails or Stainless Steel Fasteners: For corrosion resistance and long-term durability.
- Siding/Wall Flashing Materials (as needed): To integrate with existing wall flashing and maintain continuity.
Tools commonly used:
- Hammer or nail gun
- Tin snips or metal shears
- Tape measure and straight edge
- Utility knife
- Chalk line
- Caulking gun
- Ladder or scaffold for safe access
Installation Step-by-Step
The following steps outline a typical installation, though each roof and wall configuration may require adjustments. Always follow local building codes and manufacturer guidelines.
- Prepare the area: Remove any old flashing or degraded shingles around the gutter line. Inspect the drip edge and ensure the wall flashing is sound.
- Position the kick-out: Place the kick-out flashing against the wall where the gutter edge starts. The narrow end points toward the wall and the wider end directs water into the gutter.
- Install underlayment: If using underlayment, lay it beneath the kick-out to create a continuous seal between roof deck and wall surface.
- Secure the kick-out: Fasten through the roof decking or fascia using corrosion-resistant nails. Leave a small gap for sealant if required by code or manufacturer.
- Seal joints: Apply exterior sealant along the edges of the kick-out and where it meets the gutter and drip edge. Seal any fastener penetrations to prevent water ingress.
- Integrate with gutter: Ensure the top edge of the kicker sits flush with or slightly below the gutter inlet to guide water smoothly into the trough.
- Test drainage: After installation, run water near the kick-out to confirm proper diversion into the gutter and absence of leaks behind the wall.
Common Problems And How To Avoid Them
Several issues can undermine kick-out performance if not addressed during installation or maintenance.
- Improper sizing: A kick-out that’s too small or angled incorrectly may fail to divert water adequately. Choose a width that matches the gutter profile and wall plane.
- Inadequate sealing: Gaps around fasteners and joints invite water intrusion. Use compatible sealants and seal all seams.
- Wrong placement: If the kick-out is placed too high or too low, it can cause water to bypass the gutter or back up behind flashing.
- Corrosion: Select durable metals compatible with surroundings to prevent rust and staining.
- Compatibility issues: Ensure kick-out material works with existing siding and flashing to maintain a continuous weather barrier.
Maintenance And Inspection Practices
Regular inspection keeps kick-out flashing effective. Homeowners should inspect after major storms or seasonal changes. Look for:
- Loose fasteners or misaligned flashing
- Cracks or gaps in sealant at joints
- Rust or corrosion on metal components
- Viewed water staining or damp patches on the wall near the kick-out
- Gutter clogging that may cause backflow toward the kick-out
Maintenance steps include re-sealing joints, tightening fasteners, and cleaning gutters to ensure water flows toward the gutter without backing up at the wall. If any structural damage is observed, consult a licensed roofing contractor for remediation.
Code, Warranty And Best Practices
Using kick-out flashing aligns with standard roofing flashing practices in most jurisdictions. Local building codes may specify minimum flashing size, materials, and installation methods, especially in areas with heavy rainfall or high wind. Keep documentation of materials and installation. A properly installed kick-out flashing can affect warranty coverage for roofing systems; improper installation may void portions of a warranty. Contractors should follow manufacturer guidelines for flashing accessories and ensure compatibility with the gutter system and wall flashing.
Visual Guides And Reference Elements
When planning a kick-out installation, consult manufacturer diagrams showing how the kick-out integrates with drip edge, gutter, and wall flashing. A typical installation diagram highlights the kick-out placement, fastener pattern, and sealant joints. For homeowners reviewing work, request drawings or photos that demonstrate how the kick-out directs water into the gutter and prevents infiltration behind siding.