Kick-out flashing Ottawa homes need is a small but critical diverter where a sloped roof meets a wall. Its job is to push rain and meltwater into the gutter—before water can run down your stucco or EIFS and sneak behind finishes. In our freeze–thaw climate, a missing or undersized kick-out is a common root cause of staining, leaks, and recurring cracks near roof-to-wall transitions.
What is kick-out flashing—and why Ottawa homes need it
Kick-out flashing (a.k.a. diverter flashing) is an angled piece installed at the bottom of step flashing where the roof meets the wall. It “kicks” water into the gutter, preventing it from tracking down the wall surface. In Ottawa, snow melt concentrates at eaves on sunny winter days, so roof-to-wall joints see heavy, prolonged wetting. Without a diverter, water finds gaps, saturates sheathing, and shows up later as stucco/EIFS damage.
Tell-tale signs you need kick-out flashing Ottawa retrofit
- Dark streaks or algae trails on stucco/EIFS below a roof-to-wall joint.
- Cracking or delamination near the joint or at nearby windows/doors.
- Water stains inside, especially on top corners of exterior walls.
- Damaged parging or damp lower façade after snowmelt.
- Gutter overflows at the joint despite cleaning—water is bypassing the gutter.
Where kick-out flashing belongs
- Every roof-to-wall intersection where a down-slope edge meets a vertical wall and transitions into a gutter.
- High-flow zones (valleys emptying toward a wall) benefit from a larger diverter to catch concentrated flow.
- Multi-storey step-backs (upper roofs terminating into lower walls) are frequent leak points if not properly diverted.
Step-by-step: how we retrofit kick-out flashing for stucco & EIFS
- Assess & plan: confirm leak paths, check gutter slope/capacity, review wall finish (stucco, EIFS), and identify safe cut lines.
- Selective removal: gently remove a small area of finish at the intersection (and a few shingles) to expose step flashing and the weather-resistive barrier (WRB).
- Install diverter: integrate a properly sized kick-out under the last course of step flashing; the outlet must discharge into the gutter—not behind it.
- WRB integration: shingle-lap the WRB above the diverter with flashing tape as needed; maintain drainage continuity for EIFS/stucco systems.
- Rebuild finish: reinstate base/mesh and finish (EIFS) or patch stucco; texture and colour-blend surrounding areas.
- Seal & test: seal penetrations, verify gutter alignment, and perform a controlled water test in suitable weather.
See texture and finish options for blending on Colors & Textures and Ottawa case results in Our Stucco Projects.
Top mistakes to avoid
- Caulk-only “fixes”: sealant alone won’t redirect flow; it fails quickly in freeze–thaw.
- Tiny diverters: undersized kick-outs let water jump the gutter during heavy melt or rain.
- Wrong overlap: diverter must tuck under step flashing and over the WRB—never the other way around.
- EIFS/stucco termination errors: finishes should not trap water; maintain weeps/drainage plane.
- Skipping gutter fixes: misaligned or undersized gutters defeat even good kick-outs.
How kick-outs protect stucco & EIFS assemblies
Proper diverters reduce bulk water exposure, so finishes stay drier and less prone to cracking, efflorescence, and staining. For EIFS, keeping water out of the joint extends the life of sealant bands and the base/mesh layer. For traditional stucco, it reduces saturation that leads to hairlines and freeze damage.
Seasonal maintenance checklist (Ottawa-proven)
- Fall: clean gutters, check kick-outs for damage or displacement; confirm downspout extensions 2–3 m from the foundation.
- Winter: after thaws, look for fresh streaks below roof-to-wall joints.
- Spring: rinse salts and debris gently; inspect stucco/EIFS near joints for new cracks or staining.
- Anytime: re-seal failing joints around trims/penetrations to prevent side-entry.
Related services & next steps
- Stucco Repair (Ottawa) — fix cracks and blend patches after kick-out retrofits.
- Stucco Painting — seal and unify colour/texture for long-term protection.
- Parging Services — protect bases from splashback; pair with gutter/downspout upgrades.
- Free Estimate — send photos of the roof-to-wall area; we’ll advise retrofit scope and timing.
External resources (dofollow)
- Environment and Climate Change Canada — Climate Normals (context for Ottawa precipitation and freeze–thaw)
- CMHC — Maintain Your Home & Protect Your Investment (general exterior maintenance guidance)
- City of Ottawa — Building & Renovating (local permitting and best practices)
FAQ — kick-out flashing Ottawa
Do I need kick-out flashing on every roof-to-wall joint?
Install it wherever a sloped roof terminates into a wall and drains into a gutter. High-flow areas (valleys) benefit most from a larger diverter.
Can you add kick-out flashing without removing stucco or EIFS?
To integrate correctly with step flashing and the WRB, we typically open a small area. This ensures proper overlap and long-term durability.
Will a kick-out fix interior staining immediately?
It stops new water entry. Existing moisture must dry, and any damaged finishes may need repair. We assess, dry, and restore affected areas.
Talk to a local specialist:
📞 +1 (613) 861-7112 | Mon–Fri: 8AM–6PM · Sat: 8AM–2PM
✉️ durabeststucco@gmail.com | Contact Us
