The Ultimate Guide to Roofing Screws and Fixings for Plumbers & Builders

Everything You Need to Know for a Professional, Durable Installation

For plumbers, builders, and tradespeople working on roofing projects, the right screws and fixings can make all the difference. Using the wrong fasteners can lead to leaks, corrosion, or even structural problems—issues that cost time, money, and client trust.

At Plumbers HQ, we understand the importance of quality roofing fixings. That’s why our range of roofing screws and fasteners is designed to meet the needs of Australian trades, delivering reliability, durability, and ease of use. In this ultimate guide, we’ll cover everything you need to know—from types of screws to installation tips—to ensure every roof you work on is secure and long-lasting.

Why Roofing Screws and Fixings Matter

Roofing is one of the most critical parts of any building. While the materials themselves—metal sheeting, tiles, or Colorbond panels—get most of the attention, the screws and fixings play an equally important role.

• Structural Integrity: Screws and fixings hold panels firmly in place, preventing shifting or lifting in high winds.

• Waterproofing: Proper fasteners with washers seal the roof and stop leaks.

• Longevity: High-quality screws resist corrosion, maintaining strength over years of exposure to the elements.

Using cheap or incompatible fixings can compromise all of these factors. For trades, this can mean call-backs, repairs, and dissatisfied clients.

Types of Roofing Screws and Fixings

Here’s a breakdown of the most common types of roofing screws and their applications:

1. Self-Drilling Screws (Tek Screws)

Self-drilling screws are a staple for metal roofing. They drill their own hole and create threads in the material as you drive them in.

Best For:

• Colorbond and metal roofing sheets

• Steel and aluminum fixings

• Fast, efficient installations

Plumbers HQ Pick:

• High-Quality Zinc or Stainless Steel Tek Screws – Corrosion-resistant and strong, ideal for Australian conditions.

Pro Tip: Always use the correct size and length for your roofing panel thickness to avoid leaks or panel damage.

2. Hex Head Screws

Hex head screws are strong, easy to drive, and provide excellent grip for power tools. Their wide heads also help secure rubber washers for waterproofing.

Best For:

• Metal roof sheeting

• Decking and outdoor timber structures

• Fixing panels that require extra holding power

Plumbers HQ Pick:

• Colorbond Hex Head Screws with EPDM Washers – Prevent water ingress and resist rust over time.

Pro Tip: Ensure the washer is seated flat to form a tight seal around the screw hole.

3. Countersunk Screws

Countersunk screws are designed to sit flush with the roofing surface, creating a neat finish. They’re typically used for aesthetic purposes while still providing strong fixation.

Best For:

• Roof trims and flashing

• Decorative metal panels

• Applications where smooth surfaces matter

Plumbers HQ Pick:

• Flat Head Roofing Screws with Rubber Washers – Combines a flush finish with secure sealing.

Pro Tip: Countersunk screws are great for visible areas; pair with silicone sealant for extra waterproofing.

4. Timber Screws

When roofing involves timber battens, joists, or structural elements, timber screws are essential. They provide strong holding power in wood without splitting or cracking.

Best For:

• Fixing timber battens to frame structures

• Attaching timber trims and fascia boards

• DIY projects or repairs requiring wood fasteners

Plumbers HQ Pick:

• Galvanized or Stainless Steel Timber Screws – Resists corrosion and provides long-term durability.

Pro Tip: Pre-drill timber in dense hardwoods to prevent splitting.

5. Specialty Fixings (Clips, Rivets, and Washers)

Some roofing systems require more specialised fasteners: clips for securing sheets to rails, rivets for metal-on-metal fastening, or specialised washers for high wind or marine conditions.

Best For:

• Commercial roofing

• High-wind or coastal installations

• Custom metalwork applications

Plumbers HQ Pick:

• Range of Roofing Clips and Marine-Grade Fasteners – Designed for durability in extreme conditions.

Pro Tip: Always match fixings to the manufacturer’s specifications for warranty compliance.

Choosing the Right Screw Material

Roofing screws come in a variety of materials, each suited to specific environments:

• Zinc-Plated Steel: Affordable and rust-resistant for standard domestic roofing.

• Stainless Steel: Premium corrosion resistance, ideal for coastal areas or chemical exposure.

• Galvanized Steel: Durable and strong, a good middle-ground for most trades.

Pro Tip: Consider both the roof material and the environment. Stainless steel is often worth the extra cost in coastal or high-humidity areas.

How to Install Roofing Screws Correctly

Proper installation is just as important as choosing the right screw. Key steps include:

1. Pre-Drill if Necessary: Some thicker panels require pilot holes.

2. Use the Right Washer: EPDM or neoprene washers seal the hole and prevent leaks.

3. Drive Screws Straight: Avoid angled screws that may compromise sealing or panel alignment.

4. Don’t Over-Tighten: Screws should be snug, but over-tightening can crush washers and cause leaks.

5. Check Spacing: Follow manufacturer or building code recommendations for screw spacing.

Pro Tip: Keep a power driver with adjustable torque handy for consistent results.

Common Mistakes to Avoid

• Mixing Screw Types: Don’t mix metals (e.g., stainless screws on zinc panels) to prevent galvanic corrosion.

• Skipping Washers: Even small gaps around screws can lead to leaks over time.

• Reusing Screws: Old screws may have compromised threads or washers. Always use new fasteners for durability.

• Ignoring Roof Slope: High-sloped roofs may require longer screws for secure anchoring.

Why Plumbers HQ Screws and Fixings Stand Out

Plumbers HQ’s roofing screw range is curated for tradespeople who demand reliability:

• ✅ Trade-Tested Quality – Proven performance on Australian roofs.

• ✅ Wide Range of Sizes and Materials – From DIY to commercial roofing needs.

• ✅ Fast Nationwide Delivery – Get stocked fast without slowing down your projects.

• ✅ Compliance with Australian Standards – Peace of mind for trades and clients alike.

Recommended Products from Plumbers HQ

• AVADA Roofing Screws – Popular best-sellers for professional jobs.

• EPDM Washered Screws – For leak-proof metal roofing installations.

• Stainless Steel Tek Screws – Perfect for coastal or harsh environments.

• Hex Head and Countersunk Screws – For both strength and aesthetics.

Final Thoughts: The Right Screws Make All the Difference

For plumbers and builders, roofing screws and fixings aren’t just small parts—they’re the backbone of a secure, long-lasting roof. Choosing the correct screw type, material, and size, and installing it properly, ensures your work is reliable, compliant, and professional.

With Plumbers HQ’s full range of roofing screws and fixings, tradespeople have everything they need to tackle any roofing project with confidence. Whether it’s domestic Colorbond sheets, commercial steel roofing, or high-wind coastal applications, the right fasteners make all the difference.

👉 Explore the full Plumbers HQ Roofing Screws & Fixings collection today and ensure every roof you work on is built to last.