Roofing Screw 250 pcs Self-Drilling with EPDM Washer Black RAL 9005, Klimas

The farmers screw from Klimas model WFD offers top-quality screws. Specially developed for professional roof installation and sheet metal work.

With its black powder coating RAL 9005 and premium quality, it provides an elegant and discreet result that blends seamlessly with roof tiles and sheet metal coverings.

The screw is equipped with an EPDM sealing washer for secure and long-lasting sealing.

Advantages of Klimas farmers screw WFD

• High-quality screw for professional roof and sheet metal installation
• Compared to cheaper farmers screws, Klimas screws are more durable, the paint does not peel even under bending or scraping
• Self-drilling tip that saves time on the job site
• EPDM sealing washer for long-lasting and secure sealing
• Double corrosion protection – zinc coating and powder coating
• Modern black RAL 9005 finish that matches dark roofs
• Suitable for both new construction and renovation projects

Technical Specifications

Advanced Features for Professional Roof Installation

The Klimas WFD roofing screw is equipped with several technical solutions that simplify installation and provide long roof service life.

• Self-drilling point – drills through thin sheet metal and fastens directly into timber substrate without pre-drilling. Saves time on larger roofing projects.
• EPDM sealing washer – weather-tight and flexible washer that follows the sheet profile and prevents water penetration for many years.
• Hexagon head with washer – large contact area provides even pressure distribution and reduces the risk of damage to the sheet surface.
• Reinforced area under head – high shear and tensile strength for secure fastening even under high wind loads.
• Powder coating RAL 9005 – durable and UV-resistant black coating that maintains its color for a long time.
• Zinc plated base – double corrosion protection with galvanized surface under the coating layer.

Applications

The roofing screw is suitable for a wide range of roofing and metal works:

• Installation of profiled metal sheets and roof tiles to timber battens
• Facades and standing seam roofs
• Metal roofing panels and corrugated sheets
• Eaves trims, ridge caps, barge boards and gables
• Metal work on carports, garages and storage buildings
• Industrial buildings, halls and warehouses

Advantages of Black RAL 9005

The black color RAL 9005 is a popular choice for modern roof installation:

• Matches black, dark gray and anthracite colored roof tiles
• Provides a discreet and uniform appearance
• Modern expression perceived as premium
• UV-resistant color that does not fade to gray

EPDM Sealing Washer – Long-lasting Seal

EPDM is a synthetic rubber that is very well suited for roof installation:

• Withstands sun, rain, snow and large temperature fluctuations
• Maintains elasticity from approximately -40°C to +150°C
• UV and ozone resistant – does not age in sunlight
• Follows the sheet's movements and rebounds after compression
• Expected lifespan 20–30 years or more with correct installation

Which Professional Groups Is This Product Suitable For?

Klimas roofing screw in black RAL 9005 is particularly suitable for:

• Roofers and roofing contractors
• Sheet metal workers and facade installers
• Construction and roofing contractors
• Companies working with renovation of roofs
• Property maintenance and facility management organizations
• DIY users who want a professional result

Suitable Work Areas and Industries

The roofing screw is used in many types of construction projects:

• Residential buildings – houses, townhouses, holiday homes
• Commercial properties – shops, offices, shopping centers
• Industrial and warehouse buildings
• Agricultural buildings – barns, stables, machinery halls
• New construction and renovation of roofs and facades

Installation Instructions

For best results when installing roofing screws:

• Use screwdriver or drill with variable speed control
• Recommended speed: approximately 1500–2500 rpm depending on sheet thickness
• Use 8 mm hexagon bit or socket wrench
• Tighten until EPDM washer compresses evenly – do not overtighten
• Ensure that washer seals against sheet surface without being overpressed
• Install perpendicular to sheet surface for best sealing

Frequently Asked Questions - FAQ

Do I need to pre-drill before using the roofing screw?

Normally no pre-drilling is needed – the self-drilling point drills through thin sheet metal (up to approximately 0.9 mm) and fastens directly into the timber substrate. For thicker steel sheets, pre-drilling may sometimes be necessary.

What length roofing screw should I choose?

As a rule of thumb, the screw should penetrate at least 25–30 mm into the timber substrate. For 0.5–0.7 mm sheet on standard battens, 35–45 mm screws are often sufficient. For thicker battens or additional layers, longer screws may be needed.

How many screws are needed per square meter of roof?

The number depends on sheet profile and wind loads, but normally about 6–8 screws per m² are used. In wind-exposed locations or coastal areas, more may be needed. Always follow the sheet manufacturer's instructions.

Does the black coating withstand Nordic climate?

Yes, the powder coating is designed for Nordic conditions. It is UV-resistant, withstands large temperature fluctuations and works together with the zinc layer for long-term corrosion protection.

What distinguishes EPDM washer from regular rubber washer?

EPDM has significantly better UV, ozone and weather resistance than regular rubber. The material remains flexible for a long time and is therefore very suitable for roof and facade sealing.

Certifications and European Requirements

Klimas roofing screw WFD is tested and approved according to European regulations for construction products:

• ETA-16/0443 – European Technical Assessment for self-drilling screws with washers for sheet metal and roof constructions.
• CE marking – according to EU Construction Products Regulation (CPR), valid throughout the EU and recognized by national building authorities.
• The certification means documented performance for load-bearing capacity, durability and safety in accordance with European standards.

Through ETA and CE certification, the screws meet European requirements for safety, function and durability in roof and metal constructions.