Stainless Steel Decking & Cladding Screws
Reliable fixing for timber decks, façades, and exterior wood structures
Engineered stainless steel screws for durable installation of decking boards, timber façades, and exterior cladding systems. Designed to ensure clean countersinking, stable board seating, and long-term corrosion resistance in outdoor environments.
Suitable for:
Timber decking and terraces
Timber façades and rainscreen cladding
Exterior flooring and walkways
Hardwood installations
Hidden clip systems fixing
Precision Decking Screw with Under-Head Thread
Recommended for:firm installation of deck or facade boards.
The thread under the head allows for precise adjustment and securing of the board during installation.
The narrow cylindrical head fits into the wood joint, reducing visual impact.
The cutting tip facilitates starting and reduces the risk of splitting.
The serrated thread cuts through the wood fibers, improving screw driving efficiency.
The secondary thread acts as a clamp, pulling the board tight to the substructure and minimizing long-term loosening caused by timber shrinkage.
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Special Screw for Hardwoods
Recommended for: tropical wood decks or visible applications.
Milled ribs allow for smooth countersinking and a clean finish.
Ribs on the body reduce tightening torque by widening the hole during installation.
Designed for dense wood deck and facade boards.
Reduces the effort of screwing and prevents jams or overheating when working with hard woods.
Deck Screws for Clip Systems
Recommended for: invisible / hidden fastening systems.
Designed for joining boards through clips or side fittings.
Allows for the installation of decks and facades without visible screws.
Practical advantage: Ideal solution for architectural projects where visual finish is critical.
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General Application Deck Screws
Used when standard exterior fastening is required, without specific geometry requirements.
Available in all specifications:
Stainless Steel A4 - aggressive environments, coastal areas
Stainless Steel A2 - normal outdoor environments
Stainless Steel AISI-410 - hardened martensitic stainless steel for dense woods
Why use stainless steel?
Permanent Corrosion Resistance
Stainless steel does not rely on surface coatings, ensuring lasting protection even after years of exposure in any enviroment like coastal areas with high salinity.
No Stains on Wood
Prevents reactions with tannins present in many woods (such as oak or tropical woods), preventing black stains around the fastener.
Durability in Humid Environments
Maintains mechanical performance even under constant cycles of rain, drying, and condensation.
Suitable for Ventilated Facades and Decks
Ideal for applications with rear ventilation or direct exposure to the elements, where galvanized screws can degrade quickly.
Compatible with Treated and Thermo-Modified Woods
Resists chemicals present in treated woods that can accelerate the corrosion of common fasteners.
Lower Maintenance Over the Lifespan
Reduces the risk of premature replacements, ensuring stability and appearance of the project for many years.
Safe Choice for Aggressive Environments
Especially in A4 classes, offers high resistance to chlorides, coastal areas, and areas with high humidity.
Available classes:
- INOX A2 (AISI-304) – standard exterior environments
- INOX A4 (AISI-316) – aggressive exposure (coastal, chemical)
- AISI-410 – hardened stainless option for higher mechanical strength in dense hardwoods
TORX
Ensures ideal torque transfer.
Designed thread - cutting notches
The special notches on the thread cut the fibers of the wood structure when screwing.
Special cutting tip
Facilitates the start of screwing and prevents the wood from splitting.
Applications - Not Just Decking
Modern “deck screws” are used across multiple exterior timber assemblies:
Decking & Terraces
Primary fastening of walking surfaces to joists with controlled penetration and reduced splitting.
- Residential decking
- Elevated terraces
- Walkways and landscaped areas
Swimming Pool and Jacuzzi Areas
Crucial for securing decks, railings, and support structures.
- Chlorine Resistance: In swimming pools, the use of Inox A4 (AISI 316) is recommended. This grade contains molybdenum, which prevents "pitting" and rust caused by continuous exposure to chlorides and chemicals.
- Walking Safety: These screws generally have a countersunk (or reduced) head that is flush or slightly below the surface, preventing cuts or scratches for those walking barefoot.
Wood Facades and Cladding
Used in ventilated facades and rainscreen systems where board stability and corrosion resistance are essential.
Luxury Garden Furniture
Ideal for benches, tables, and loungers.
- Unlike common screws, stainless steel does not react with the tannins of noble woods (such as Ipe or Cedar), preventing those unwanted black stains around the screw head.
Humid Interior Spaces
Where constant condensation would quickly rust conventional screws.
- Perfect for saunas, spas and bathrooms.
Industrial and Food Applications
Due to their hygiene and resistance to oxidation, they are often used in structures that require frequent cleaning or contact with aggressive environments.
Material selection guide
Choose the right material in 30 seconds.
The selection of stainless steel mainly depends on the exposure environment and the density of the wood — not just on the fact that it is exterior.
1️⃣ Where will it be installed?
| Installation Environment | Recommended Material |
|---|---|
| Normal exterior (gardens, terraces, ventilated facades) | Stainless Steel A2 |
| Coastal area or high humidity | Stainless Steel A4 |
| Pools, spa, treated wood, aggressive environments | Stainless Steel A4 |
| Very dense tropical woods (Ipe, Cumaru, etc.) | AISI-410 |
| Applications requiring higher mechanical resistance | AISI-410 |
2️⃣ What type of wood are you using?
| Type of Wood | Technical Challenge | Recommended Solution |
|---|---|---|
| Pine, spruce, treated wood | Low density | Stainless Steel A2 |
| Thermowood | Dimensional movement | Inox A2 or A4 |
| Oak, chestnut | Presence of tannins | Inox A4 recommended |
| Dense tropical woods | High torque | AISI-410 |
| Very hard woods + quick installation | Risk of locking | AISI-410 with pre-drilling |
3️⃣ What is the project's priority?
| Priority | Best Option |
|---|---|
| Maximum anti-corrosive durability | Stainless Steel A4 |
| Cost/performance balance | Stainless Steel A2 |
| Ease of installation in hard wood | AISI-410 |
| High mechanical resistance | AISI-410 |
| Standard outdoor application | Stainless Steel A2 |
✔ Practical Rule
Use A2→ when the environment is not aggressive.
Use A4→ when there is constant humidity, salinity, or tannins.
Use AISI-410→ when the challenge is mechanical (very hard wood), not chemical.
Important:Installation in hard woods benefits from pre-drilling, which reduces torque and prevents cracking.
Technical features that improve installation
Modern deck screws are not ordinary screws.
They incorporate functional geometries that enhance performance:
Serrated threads that cut through wood fibers.
Cutting tips that reduce the risk of splits.
TORX drive that ensures efficient torque transmission.
These features reduce installation effort and increase placement accuracy.
Recommendations for hardwoods
When working with tropical or high-density woods:
✔ Prefer AISI-410 or screws with cutting ribs
✔ Respect edge distances
✔ Avoid excessive tightening
✔ Use geometries that reduce installation torque
Important note — these are not structural screws
The deck screws are intended for fastening coverings and do not replace certified structural fasteners when there are engineering loads.
Consumption Guide
Quantity of screws
The quantity depends on the spacing of the beams (joists), width of the deck boards, and the design of the deck.
Each board is secured at all intersections with the structure.
Average Estimate
| Joist Spacing | Screws / m² |
|---|---|
| 300 mm | 35–40 |
| 400 mm | 25–30 |
| 500 mm | 20–24 |
Add 5–10% for trim, stairs, and waste.
Difference between professional and common screws
The specific screws for decks and facades include:
Fiber cutting geometry
Controlled countersinking
Reduced tightening effort
Stable board tightening system
These details directly influence the assembly speed, finish quality, and installation durability.
FAQ
Outdoor timber structures are exposed to moisture cycles, tannic acids, and ventilation gaps that accelerate corrosion in standard coated fasteners. Stainless steel provides permanent corrosion resistance and prevents staining or structural degradation over time.
The main difference is the corrosion resistance.
A2 (Stainless Steel 304) is suitable for most outdoor applications.
A4 (Stainless Steel 316) contains molybdenum, offering greater resistance to environments with chlorides, permanent humidity, or pollution.
👉 In coastal areas or near pools, A4 is the safe choice.
No.
A4 is not chosen for being mechanically stronger, but rather for its better corrosion resistance.
The mechanical strength between A2 and A4 is similar.
AISI-410 addresses a different problem:
➡ Installation in very dense woods.
This stainless steel is hardened (martensitic), offering:
Greater resistance to screwing effort
Lower risk of head breakage
Better penetration in hardwood without pre-drilling in many cases
It is a mechanical, not chemical.
No.
| Material | Corrosion Resistance | Mechanical Resistance |
|---|---|---|
| A2 | Good | Medium |
| A4 | Very High | Medium |
| AISI-410 | Moderate | High |
👉 Choose A4 when the risk is corrosion.
👉 Choose AISI-410 when the challenge is wood hardness.
Yes, but it's not ideal.
Tropical woods:
Generate very high torque values
Can cause seizing of A2/A4 stainless steel
Increase the risk of screw breakage
👉 For hardwood, AISI-410 offers a safer installation.
It depends on the wood.
Softwoods → usually not
Dense woods → recommended, or use AISI-410
Near the ends → always advisable
Galvanized coatings can degrade with:
Permanent moisture
Wood tannins
Hostile saline environment / coastal areas
Result:
❌ corrosion
❌ black stains on wood
❌ reduced lifespan
Stainless steel avoids these problems from the start.
No.
They are designed for:
✔ Fastening of coverings
✔ Dimensional stability of boards
✔ Outdoor durability
They do not replace certified structural screws for load-bearing connections.
To see the full range of structural screws, visit:
Where Wood Meets the Ocean,
Performance Matters
A2, A4, and AISI-410 stainless steel solutions developed for durable installations of decks and cladding in demanding marine environments.