Timber & Landscaping Screws for Heavy-Duty Outdoor Fixing

Product Range
The Timber Screw – Hex – Exterior Green is a heavy-duty alternative to coach screws, with a hex head, fixed washer, and a green organic coating that resists corrosion for up to 1,000 hours in salt spray testing. It’s ideal for general outdoor timber-to-timber fixings where strength and durability are key.

The Timber Screw – Hex – A4 Stainless Steel offers the same performance, but in corrosion-proof A4 stainless – perfect for Green Oak, hardwoods, or coastal environments where rust resistance is essential.

The Timber Screw – Hex – Exterior Silver is a robust, high-strength screw with a silver corrosion-resistant finish. It’s designed to be driven straight into most timbers without pre-drilling, saving time on site while delivering reliable hold.

The Timber Screw – Wafer – Exterior Green has a wide, low-profile wafer head that offers excellent clamping power with a cleaner finish. Coated in the same green plating as the hex version, it’s well-suited to timber structures where appearance matters.

The Timber Screw – Wafer – A2 Stainless Steel is the go-to option for visually neat, corrosion-proof timber fixings. It’s especially useful in applications involving corrosive materials like Green Oak or installations in damp or coastal environments.

Which Screw Should I Use?
Here’s a quick guide to picking the right timber screw for your job:

• Raised beds, fences, garden structures – Go for Hex Exterior Green or Wafer Exterior Green
• Landscaping timbers or pressure-treated posts – Choose Hex Exterior Silver for max strength and long-lasting hold
• Green Oak or hardwoods – Always use Stainless Steel (Hex or Wafer) to avoid staining and corrosion
• Jobs where the finish matters – Try the Wafer Head screws for a cleaner, flatter profile
• Fixing where space is tight – Wafer heads also help where clearance is limited

Which Screws Resist Rust the Best?
Outdoor timber jobs demand screws that won’t give up when the weather turns. Here’s how the finishes stack up:

• Exterior Green Coating – Withstands 1,000 hours of salt spray, great for general external use
• Exterior Silver Coating – Same corrosion rating as green, with a cleaner, metallic finish
• A2 & A4 Stainless Steel – The best choice for corrosive woods (like Green Oak), wet areas, or coastal projects. No coating to wear off – just solid rust resistance through and through

How Do I Know What Size to Use?
Timber screws come in various lengths and gauges depending on your material thickness and the strength you need. Here's a simple rule of thumb:

• Go at least 2.5x deeper than the thickness of the timber you're fixing. Foe example: fixing a 50mm thick sleeper to another timber? Use at least a 125mm screw
• Use longer screws (150mm–300mm) for retaining walls, posts and multi-layer structures
• For clean clamping, make sure the thread stops before the head in most applications – this lets the head pull the top piece down tight

If in doubt, longer is usually better – you’ll get more holding power and fewer issues later.

Why Buy Timber and Landscaping Screws from Fast Fixings Online?

When you buy your Timber and Landscaping Screws from Fast Fixings Online, you’re getting more than just great fixings. We offer free next working day delivery on orders over £60, so your materials arrive when you need them. You can create a free account to save time on repeat orders, and if you join our VIP Rewards Club, the more you spend, the more you save. It’s our way of giving something back to loyal trades and customers who keep coming back.