5-Inch Half Round End Caps
5-Inch Half Round End Caps

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Complete your Half Round Gutter System with precision-formed 5-Inch Half Round End Caps that deliver watertight closure and authentic traditional styling. Our End Caps are manufactured from .019 gauge aluminum with factory-applied color matching your Half Round System. These essential components install quickly with Gutter Sealant and fasteners, preventing water leakage at gutter terminations while maintaining the classic European architectural appeal that defines quality period construction.
5-Inch Half Round End Caps Key Features
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Authentic Half Round profile
Precision-formed to match the curved geometry of Half Round Gutters for seamless integration and traditional styling
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Watertight sealing
Creates reliable closure at Gutter run terminations, preventing water leakage and protecting building foundations
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Period-correct colors
Available in White and Brown finishes to complement classic architectural color schemes and historic building requirements
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Quick installation
Simple attachment with Gutter Sealant and Rivets for secure, long-lasting connection that maintains curved profile integrity
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5-Inch Half Round End Caps Material & Specifications
Material: .019 gauge aluminum, baked-on enamel finish
Profile: Half Round curved design
Gutter Compatibility: 5-Inch Half Round Gutters only
Finish / Colors: White and Brown options
Gauge / Thickness: .019"
Use: Traditional Gutter System terminations, historic restorations
Notes: Verify profile compatibility with your Half Round Gutter stock before ordering
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
- Measure and cut: Cut Half Round Gutter square at termination point. Test-fit End Cap to ensure proper seating and curved profile alignment.
- Clean surfaces: Remove any debris or oxidation from Gutter end and End Cap contact areas for optimal sealant adhesion.
- Apply Sealant: Place continuous bead of high-quality Gutter Sealant around the inside perimeter of the curved End Cap.
- Position cap: Carefully slide End Cap onto Half-Round Gutter end, ensuring full contact around the curved profile and even reveal.
- Secure connection: Install Pop Rivets or appropriate fasteners every 3-4" around the curved perimeter. Avoid over-tightening to prevent profile distortion.
- Tool sealant: Remove excess sealant and smooth joints for professional appearance and complete weather seal.
Maintenance
- Inspect annually: Check End Cap attachment and sealant condition during routine Gutter cleaning and maintenance.
- Clear debris: Remove any leaves or debris that may accumulate around End Cap areas to prevent water backup.
- Monitor sealing: Look for signs of sealant deterioration or water staining that might indicate compromised sealing.
- Check alignment: Ensure End Caps remain properly seated and haven't shifted due to thermal expansion or building settlement.

Compare Styles & Materials
5" Half Round System vs 6" System
- 5" System: Ideal for most residential homes up to 1,400 sq ft per Downspout, easier installation, lower cost, standard for typical traditional applications.
- 6" System: Handles 40% more water but costs more, requires larger brackets, overkill for most residential historic restoration needs.
When to Choose 5" Half Round End Caps
- Standard residential homes (up to 1,400 sq ft per downspout)
- Historic restoration projects with authentic period requirements
- Cost-effective traditional Gutter solutions for most applications
- Existing 5" Half Round Gutter systems requiring matching components
- Colonial, Victorian, and European-style homes with moderate roof areas
Best Choice: Use 5" Half-Round End Caps for most residential traditional Gutter installations when you want authentic styling, reliable performance, and cost-effective drainage solutions. The 5" Half Round system handles typical residential water loads efficiently while offering easier installation and lower material costs than oversized 6" systems, all while maintaining the classic European architectural appeal.
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.
Can these End Caps be used with K-Style Gutters?
No. These End Caps are designed specifically for the curved profile of 5-Inch Half Round Gutters only. K-Style Gutters require their own angular End Caps for proper fit and sealing.
Do I need special brackets or hangers for Half-Round Gutters?
Yes. Half Round Gutters require specific brackets designed to cradle the curved bottom profile. Standard K-Style brackets won't provide proper support and can cause sagging or damage to the traditional curved shape.
Why are Half Round End Caps only available in White and Brown?
These classic colors complement the traditional architectural styles where Half Round Gutters are most appropriate. The limited color palette maintains authentic period appearance while covering the most common historic trim color needs.
What's the best sealant for Half Round End Cap installation?
Use our Ruscoe Self-Leveling Permanant Sealant designed for painted aluminum. The curved profile requires careful sealant application to ensure complete contact around the entire perimeter.
How many fasteners should I use per End Cap?
Install Pop Rivets or Screws every 3-4" around the curved perimeter. The curved profile requires careful fastener placement to avoid distorting the traditional half-round shape.
Submit an RFQ or Questions
Please feel free to contact us - we promise to respond to your inquiry within the next business day. For longer requests, visit our RFQ page.