Nail placement and depth are crucial components to the longevity of your roof. Manufacturers allow installation with air guns but will void the warranty if nailing was not done right. Hand-nailing is a bulletproof alternative ensuring your shingles are installed the right way, every time.
The power of a nail-gun can easily drive nails too deeply into your shingles, causing a break in the water-tight seal and resulting in leaks. Hammers will drive nails flush every time.
The variability of a nail-gun’s air pressure can also prevent nails from being driven far enough into your roof, causing damage to the shingles set above them and jeopardizing the water-tight seal of your roof.
The location of each nail matters when it comes to preventing leaks and ensuring the longevity of your roof, and nail-guns increase the likely-hood of misplaced nails.