Step 1: Determine Left vs. Right Orientation

Stand at ground level facing your home and look up at the gutter. A left end cap closes the left side of the gutter run, while a right end cap closes the right side. Most homes need both left and right caps.

💡 Tip: Using the wrong orientation creates gaps and leak points.

Step 2: Match Your Gutter Style

• K-Style: Most common residential gutters (OG/Ogee profile)
• Half-Round: Curved profile for historic homes & copper systems
• Fascia: Wide-bottom gutters with extended dimensions
• Box Gutter: Square/rectangular commercial profiles

Step 3: Measure Your Gutter Size

Measure the gutter width at the top opening:

• 5-inch: Standard residential gutters
• 6-inch: Heavy-duty residential & light commercial
• 7-inch: Commercial & high-volume applications

Step 4: Choose Your Material

• Aluminum: Best value, 25+ colors, 20+ year lifespan
• Copper: Premium aesthetics, natural patina development
• Steel: Heavy-duty commercial applications

Same-Day Pickup

Damascus showroom stock ready for immediate pickup

Local Delivery

Damascus, Clackamas County & Portland metro delivery

25+ Colors

Powder-coated aluminum in stock colors plus custom options

Bulk Pricing

Contractor case quantities with volume discounts

1. Determine Left vs. Right Orientation

Stand at ground level facing your home. A left end cap closes the left side of the gutter run, while a right end cap closes the right side. Most homes need both left and right caps.

💡 Tip: Using the wrong orientation creates gaps and leak points.

2. Match Your Gutter Style

• K-Style: Most common residential gutters (OG/Ogee profile)
• Half-Round: Curved profile for historic homes & copper systems
• Fascia: Wide-bottom gutters with extended dimensions
• Box Gutter: Square/rectangular commercial profiles

3. Measure Your Gutter Size

Measure the gutter width at the top opening:

• 5-inch: Standard residential gutters
• 6-inch: Heavy-duty residential & light commercial
• 7-inch: Commercial & high-volume applications

4. Choose Your Material

• Aluminum: Best value, 25+ colors, 20+ year lifespan
• Copper: Premium aesthetics, natural patina development
• Steel: Heavy-duty commercial applications

🔷 Aluminum End Caps

Optimal balance of durability, corrosion resistance, and value for Pacific Northwest installations. Manufactured from 0.016" to 0.027" gauge aluminum depending on gutter size, providing structural integrity that withstands thermal expansion and contraction.

🟤 Copper End Caps

Premium aesthetics and exceptional longevity for copper gutter installations. Manufactured from 16-ounce solid copper (0.0162" to 0.0216" thickness), these end caps develop natural patina over time, creating the distinctive verdigris finish valued in architectural applications.

⚙️ Galvanized Steel End Caps

Heavy-duty performance for commercial applications and extreme weather environments. 24-gauge steel construction with protective coatings resists impact damage and maintains structural integrity in high-wind areas.

⚠️ Important: All installation methods require gutter sealant applied to the inside edge before attachment. High-quality silicone or butyl-based sealant creates the waterproof barrier preventing leaks.

Professional powder-coated aluminum end caps available in 25+ colors. Bring gutter samples to our Damascus showroom for exact color matching.

+ 13 additional colors available. Custom colors available for bulk orders (5-7 business days lead time).

❌ Improper Sealing (80% of leaks)

Prevention: Always apply continuous bead of gutter sealant around inside perimeter before installation. Ensure complete coverage with no gaps.

❌ Wrong Orientation

Prevention: Installing left cap on right side (or vice versa) prevents proper seating and creates visible gaps. Verify correct left/right designation before installation.

❌ Plastic End Cap Deterioration

Prevention: Budget plastic end caps crack in cold weather and warp in heat, lasting only 2-5 years. Professional aluminum end caps maintain integrity for 20+ years.

❌ Insufficient Fastening

Prevention: End caps secured with sealant alone can separate under thermal stress. Always use mechanical fastening (crimps, rivets, or screws) in addition to sealant.

How do I know if I need a left or right end cap?

Stand at ground level facing your home and look up at the gutter. A left end cap closes the left side of the gutter run, while a right end cap closes the right side. Most residential properties require both left and right end caps to complete their gutter system. If you're unsure, bring photos to our Damascus showroom and our team will help identify the correct orientation.

What's the difference between aluminum and copper end caps?

Aluminum end caps offer the best value with 20+ year lifespan, available in 25+ powder-coated colors, and excellent corrosion resistance for Pacific Northwest weather. Copper end caps provide premium aesthetics with 50+ year lifespan and develop natural patina over time, but cost significantly more. Choose aluminum for standard residential installations and copper for architectural applications or when matching existing copper gutter systems.

Can I install end caps myself or do I need a professional?

DIY installation is possible with proper tools and technique. You'll need gutter sealant, and either a hand crimper, pop rivet gun, or drill with stainless steel screws. The key is applying continuous sealant bead around the inside perimeter before attachment and ensuring proper left/right orientation. Our Damascus team provides complimentary installation guidance and can demonstrate proper technique. For commercial installations or if you're uncomfortable working on ladders, we recommend professional installation.

How long do aluminum end caps last in Oregon weather?

Professional-grade aluminum end caps with powder-coat finish last 20+ years in Pacific Northwest conditions when properly installed. The powder-coat finish resists UV degradation, thermal cycling (20°F to 100°F temperature swings), high rainfall, and prevents moss/algae growth. Budget plastic end caps typically fail within 2-5 years due to cracking in cold weather and warping in heat, making aluminum the superior long-term investment.

What size end cap do I need for my gutters?

Measure your gutter width at the top opening. Standard residential gutters are 5 inches (most common), heavy-duty residential and light commercial are 6 inches, and commercial applications use 7 inches. The end cap must precisely match your gutter width and profile (K-style, half-round, fascia, or box gutter). Using undersized end caps creates gaps and leaks, while oversized caps won't fit properly. Bring gutter measurements or photos to our Damascus showroom for sizing verification.

Do you have end caps in stock or do I need to order them?

We maintain extensive inventory at our Damascus location for same-day pickup. Standard aluminum end caps in White, Bronze, Black, and Clay are typically in stock for 5-inch and 6-inch K-style gutters. Specialty colors, copper end caps, and less common sizes are usually available within 3-5 business days. Contractor case quantities (50-unit cases) require 3-5 business days notice. Call (503) 496-7017 to confirm specific availability before visiting.

What causes end cap leaks and how can I prevent them?

Improper sealing causes 80% of end cap leaks. Always apply continuous bead of high-quality silicone or butyl-based gutter sealant around the inside perimeter before installation, ensuring complete coverage with no gaps. Other common causes include wrong orientation (left cap on right side), insufficient mechanical fastening (sealant alone isn't enough), and using budget plastic caps that crack or warp. Professional aluminum end caps with proper sealant application and mechanical fastening (crimps, rivets, or screws) provide leak-free performance for 20+ years.

Can you match the color of my existing gutters?

Yes, we offer color matching service at our Damascus showroom. Bring a gutter sample or photo and we'll match it to our 25+ powder-coat color options. Most standard colors (White, Bronze, Black, Clay, Musket Brown) are available for same-day pickup. Custom color matching for specialty finishes requires 5-7 business days for bulk orders. Our powder-coat finishes maintain color consistency for 20+ years, ensuring your end caps continue matching your gutter system long-term.

📍 GutterAll - Damascus, OR

19759 SE Sunnyside Rd, Damascus, OR 97089

Monday-Friday: 8:00 AM - 4:00 PM