6-Inch K-Style Outside Bay Strip Miter (45°)
6-Inch K-Style Outside Bay Strip Miter (45°)

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Tackle exterior bay window corner challenges in high-capacity Gutter Systems with our 6-Inch 45° Outside Bay Strip Miter for K-Style Gutters. This purpose-built flat aluminum strip covers mitered Gutter joints at 45° angles, offering cost-effective sealing solutions for exterior bay window applications on large systems and angled architectural elements. Fabricated from .019" aluminum and supplied in 30° White, 80° White, and Brown finishes, these Bay Strip Miters deliver dependable corner coverage when properly installed and sealed by skilled contractors on large residential and commercial bay window installations.
6-Inch K-Style Outside Bay Strip Miter (45°) Key Features
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Large interior bay compatibility
Engineered specifically for bay window corners requiring 45° angles instead of standard 90° corner applications
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High-capacity bay window sealing
Flat aluminum strip provides economical joint coverage for 22.5° Gutter cuts on each adjoining bay window section
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Premium aluminum construction
Durable .019" aluminum gauge withstands weather exposure while remaining workable for precise bay window installations
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Versatile finish options
Available in 30° White (easier to paint), 80° White, and Brown finishes for custom color matching on bay window projects
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6-Inch K-Style Outside Bay Strip Miter (45°) Material & Specifications
Type: Inside Bay Strip Miter, 45°
Gutter Compatibility: 6-Inch K-Style only
Material: Aluminum, baked-on enamel finish
Gauge / Thickness: .019"
Angle: 45° for large system interior bay window applications
Capacity: Designed for roof areas up to 2,400 sq ft per downspout
Colors: 30° White (paint-ready), 80° White, Brown
Application: Large interior bay windows, 45° inside architectural corners requiring economical joint coverage
Installation: Requires 22.5° Gutter cuts on each section, proper sealing, and secure fastening
Use: Large bay window projects, inside angled corners, matching existing Bay Strip Miter systems
Installation & Maintenance Tips
This installation information is a general guide only and may not address your specific site conditions. Always follow local building codes, safety practices, and professional methods. If you are not experienced with this type of work, hire a qualified contractor.
Installation
- Cut Gutter angles: Cut both 6-Inch Gutter sections at 22.5° angles to form the 45° large system interior bay window corner joint; ensure clean, precise cuts for proper bay window alignment.
- Test fit assembly: Position large Gutter sections to form 45° inside bay window corner; verify proper alignment and adjust cuts if necessary before final high-capacity bay window installation.
- Apply sealant generously: Place continuous bead of high-quality Gutter Sealant along both Gutter edges where Bay Strip Miter will overlap on the large system interior bay window corner.
- Position Bay Strip Miter: Center strip over the 45° inside joint ensuring equal overlap on both large bay window Gutter runs; press firmly into sealant bed for complete contact.
- Secure with fasteners: Install Pop Rivets or Hex Screws every 2-3 inches along both edges of the Bay Strip Miter for maximum holding power on large system interior bay window application.
- Seal and finish: Tool excess sealant smooth and inspect for complete coverage; ensure watertight seal at all connection points to prevent water infiltration on high-capacity interior bay window corner.
Maintenance
- Inspect large system sealing: Check Bay Strip Miter seams seasonally for cracks, gaps, or sealant failure at the 45° large system interior bay window corner; reseal promptly to prevent water infiltration.
- Monitor fastener condition: Verify Rivets or Screws remain tight and corrosion-free on the high-capacity inside bay window corner; replace loose or damaged fasteners with aluminum alternatives.
- Clear bay window debris: Remove accumulated leaves and material at large system interior bay window corners during routine cleaning to prevent water backup and joint stress.
- Check positioning: Ensure Bay Strip Miter remains properly positioned and hasn't shifted due to thermal expansion or settling on large bay window installation.

Compare Styles & Materials
6-Inch Inside K-Style Bay Strip Miter vs Other Options
5-Inch vs 6-Inch Inside Bay Strip Miter Systems
- 5-Inch System: Handles up to 1,400 sq ft per Downspout, easier installation, lower cost, standard for typical bay window applications.
- 6-Inch System: Handles up to 2,400 sq ft per Downspout (40% more capacity), required for large bay windows, higher cost, essential for commercial bay window installations.
Inside vs Outside Bay Strip Miters for Large Systems
- Inside Bay Strip Miter: Designed for interior large bay window corners, somewhat protected from direct weather, can accumulate debris more easily in high-capacity systems.
- Outside Bay Strip Miter: Designed for exterior large bay window corners, more weather exposure, easier debris clearing but greater weather stress on high-capacity applications.
Best Choice: Use 6-Inch Inside Bay Strip Miters for large interior bay window projects and 45° inside corner applications when you need high-capacity corner coverage and reliable sealing performance.
Frequently Asked Questions
This is a general guide only and may not address your specific site conditions. If you are not experienced with this type of work, hire a qualified contractor.
When do I need 6-Inch instead of 5-Inch Inside Bay Strip Miters?
Choose 6-Inch inside Bay Strip Miters when your interior bay window roof area exceeds 1,400 sq ft per Downspout, for large commercial bay window applications, or when you have existing 6-Inch Gutter Systems requiring matching components.
What's the difference between 30° White and 80° White finishes?
30° White has a flatter finish that accepts paint more easily, making it ideal for large interior bay window projects requiring custom color matching. 80° White has a slightly glossier finish that matches most standard large Gutter systems. Brown provides a traditional color option that complements earth-tone building exteriors.
How do I cut large Gutters for Outside Bay Strip Miter installation?
Cut each 6-Inch Gutter section at 22.5° angles so they form a 45° inside corner when joined. This is different from standard large system inside corners that require 45° cuts on each section to form 90° corners.
Can I paint the 30° White finish?
Yes. The 30° White finish is specifically designed to accept paint more easily. Clean the surface thoroughly, use aluminum-compatible primer, and apply high-quality exterior paint for best large interior bay window color matching results.
Are large system outside Bay Strip Miters more exposed to weather damage?
Bay Strip Miters for larger Gutter Systems can be more challenging to access for installation and maintenance due to their size, but the installation process is similar to smaller systems. Proper measurement and cutting at 22.5° angles is critical, and large interior corners may require additional support and maintenance attention.
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