Nail guns are a fantastic tool for speeding up fence construction, but they can also be the source of frustrating problems if not used correctly. One common issue is over-nailing, where the nail is driven too deep and penetrates through the back of the fence board. Here's why you want to avoid this:
1. Decreased Holding Power
Wood Splitting: A nail driven with excessive force can split the wood, especially with thinner fence boards like 1x6s. This weakens the hold and can lead to the board loosening over time.
Reduced Grip: When a nail goes through the board, it loses contact with the back surface, reducing its grip and making the board more prone to pulling away from the rail.
2. Safety Hazards
Protruding Nails: Nails sticking out the back of the fence pose a safety risk, especially for children and pets who might come into contact with them.
Snagging: Over-driven nails can snag clothing or skin, causing injuries.
3. Aesthetic Issues
Unsightly Appearance: Nails poking through the back of the fence look unprofessional and detract from the overall appearance.
Rust Stains: Exposed nail tips are more likely to rust, leading to unsightly stains on the fence.
4. Weakened Structure
Stress on the Wood: Over-nailing can create stress points in the wood, making it more susceptible to cracking and warping.
Reduced Lifespan: The weakened hold and potential for splitting can shorten the lifespan of your fence.
Why Flush Nails are Best
Ideally, nails should be driven flush with the surface of the fence board. This provides optimal holding power without compromising the structural integrity or aesthetics of the fence.
Tips to Avoid Over-Nailing
Adjust Nail Gun Pressure: Ensure the nail gun's air pressure is set correctly for the type of wood and nail length you're using.
Use the Right Nail Length: Choose nails that are long enough to penetrate the rails and provide a secure hold, but not so long that they go through the fence boards.
Practice on Scrap Wood: Get a feel for the nail gun's power and adjust your technique before working on the actual fence.
Take Your Time: Don't rush! A steady and controlled approach will help you avoid over-nailing.
By taking these precautions and paying attention to your nailing technique, you can ensure a strong, safe, and beautiful fence that will last for years to come.
