Why Corrosion-Resistant Screws Matter
In environments exposed to moisture, salt air, or chemically treated wood, fasteners must withstand the elements. For contractors working on decks, docks, piers, and coastal structures—especially in hurricane-prone areas—selecting the right corrosion-resistant screw isn’t just a recommendation. It’s essential for safety, longevity, and code compliance.
This article walks through the top types of corrosion-resistant screws used in exterior and coastal applications, and how to choose the best fit for your project.
Top 3 Corrosion-Resistant Deck Screws
#3 – Epoxy Coated Heat-Treated Steel
Epoxy-coated screws are steel fasteners coated with a durable, corrosion-resistant polymer resin. The coating provides strong adhesion and protection, even after the screw is driven into wood or composite materials. These screws are often recommended for general outdoor use where moderate corrosion resistance is needed.
Ideal for use with:
- Treated lumber
- Wood and composite decking (when manufacturer recommends coated fasteners)
#2 – Grade 304 and 305 Stainless Steel
304 and 305 stainless steel are widely used grades in exterior fasteners. These screws offer improved corrosion resistance over epoxy-coated steel and are preferred in environments with higher moisture exposure.
Things to know:
- Stainless steel is softer than carbon steel and may require pre-drilling.
- Some versions include additional epoxy or ceramic coatings to enhance resistance and reduce movement or loosening over time.
Ideal for use with:
- Wood decking
- Composite decking
#1 – Grade 316 Stainless Steel (Marine Grade)
316 stainless steel offers the highest level of corrosion resistance among commonly used deck screws. Often referred to as “marine grade,” this material is designed to resist rust and corrosion in harsh coastal and saltwater environments.
Ideal for use with:
- Structures near saltwater or swimming pools
- Coastal decks, docks, and piers
- Naturally rot-resistant lumber (cedar, redwood, tropical hardwoods)
Composite decking
Fasteners That Resist Stripping
For efficient and secure installation, choosing screws engineered to resist stripping is just as important as corrosion resistance. Many of today’s deck screws are designed with:
- Star or square drive heads for reduced slippage
- Type 17 points for faster starts, lower torque, and reduced need for pre-drilling
These features help prevent damage to the decking material and reduce stress on both the installer and tools.
Additional Corrosion-Resistant Fasteners
Beyond deck screws, a well-supplied project may require a variety of fasteners that hold up to moisture and coastal conditions. Common corrosion-resistant options include:
- Galvanized screws
- Stainless steel fasteners
- Threaded rod
- Nuts and bolts (timber, lag, carriage, hex head)
Tools and Safety Equipment for Coastal Construction
The right tools make all the difference during deck or dock construction. Professional-grade tools designed for frequent use in tough environments improve productivity and safety. Examples include:
- Corded and cordless drills (Milwaukee, Dewalt)
- Quik Drive screw systems (Simpson Strong-Tie)
- Drill bits
- PPE such as safety glasses, gloves, earmuffs, vests, and hard hats
Temporary Power Solutions for the Jobsite
Contractors working on outdoor or remote sites often need portable power systems. These are especially useful for coastal or hurricane rebuilding projects where access to permanent power is limited. Popular solutions include:
- Generac generators
- Heavy-duty commercial-grade power cords
Real-World Application: Simpson Strong-Tie Case Study
For an in-depth look at how corrosion-resistant fasteners perform in demanding coastal projects, view this case study featuring Simpson Strong-Tie structural engineering solutions for pier and decking applications:
Build for Durability and Coastal Conditions
Corrosion-resistant screws are more than just a product—they’re a crucial part of safe and lasting construction in challenging environments. Choosing the right materials from the start helps prevent premature failure, reduce maintenance, and protect your investment.
Whether you’re building a deck, dock, or pier, using the appropriate fasteners, tools, and power equipment ensures your project stands up to the elements.
Request a Quote or Contact AJAX
AJAX stocks a wide range of corrosion-resistant deck screws and fasteners for demanding coastal and hurricane-resistant construction projects. If you need help selecting the right materials or want to request a quote, we’re here to help.
Call us at 904-353-4783 or contact us to speak with our team.
