First and foremost, it's important to make sure that the screws are specifically designed for metal roofing. These screws are typically self-drilling and have a sealing washer to prevent leaks. Using regular screws can lead to corrosion and roof failure.
One popular type of metal roofing screw is the galvanized steel screw. These screws are coated with zinc to protect against rust and corrosion. They come in a variety of sizes and lengths to accommodate different panel thicknesses and roof pitches.
Another option is stainless steel screws. These screws are more expensive than galvanized steel screws but offer superior durability and resistance to corrosion. They are a great choice for coastal areas or areas with high humidity.
No matter what type of metal roofing screw you choose, it's important to make sure they are properly installed. The screws should be driven straight into the roof deck, not at an angle, and tightened just enough to compress the washer without causing it to deform.
It's also important to consider the spacing and placement of the screws. Typically, screws should be spaced 12-24 inches apart along the ridge and eaves of the roof, and 18-24 inches apart along the rest of the roof. This will help prevent panel uplift in high winds.
Additionally, make sure to use the proper type of screw for the specific metal panels being used. Different manufacturers may require different types of screws, so be sure to check their specifications before making a purchase.
In terms of cost, metal roofing screws range from around $0.10 to $0.50 each, with stainless steel screws being the most expensive. While it may be tempting to opt for cheaper screws, investing in high-quality screws is well worth it in the long run to ensure the longevity and integrity of your roof.
In conclusion, choosing the right metal roofing screws is essential for a successful and durable installation. Galvanized steel and stainless steel screws are both popular choices, but be sure to use screws specifically designed for metal roofing and follow proper installation and spacing guidelines. With the right screws and proper installation, your metal roof will provide years of protection and beauty for your home.