Understanding Gutter Systems
A properly sized gutter system protects your home's foundation, landscaping, and siding from water damage. The system consists of gutters (horizontal channels), downspouts (vertical pipes), and various connectors and accessories.
Gutter Size Guide
| Gutter Size | Roof Area Capacity | Best For |
|---|---|---|
| 5" K-Style | Up to 5,500 sq ft | Most residential homes |
| 6" K-Style | Up to 8,000 sq ft | Large roofs, heavy rainfall |
| 5" Half-Round | Up to 4,500 sq ft | Historic homes, aesthetics |
| 6" Half-Round | Up to 6,500 sq ft | Larger historic homes |
Material Comparison
| Material | Lifespan | Cost/LF | Maintenance |
|---|---|---|---|
| Aluminum | 20-30 years | $4-9 | Low |
| Vinyl | 10-20 years | $3-6 | Low |
| Steel | 20-25 years | $6-12 | Medium |
| Copper | 50+ years | $25-40 | Very Low |
Downspout Placement Rules
- One downspout per 30-40 feet of gutter run
- Place at corners and lowest points
- Extend 4-6 feet away from foundation
- Use 2x3" downspouts for 5" gutters, 3x4" for 6" gutters
- Add splash blocks or underground drains at outlets
Gutter Maintenance Tips
- Clean gutters at least twice yearly (spring and fall)
- Check for proper slope (1/4" per 10 feet toward downspout)
- Inspect hangers and brackets for secure attachment
- Look for rust, holes, or separated seams
- Ensure downspout extensions direct water away from foundation
- Consider gutter guards if you have many trees
Signs You Need New Gutters
- Visible cracks, holes, or rust spots
- Gutters pulling away from the house
- Water pooling near foundation after rain
- Paint peeling on or around gutters
- Mildew or water damage in basement
- Sagging or improperly pitched gutters