Installing Anti-Climb Spikes: A Practical Guide to Securing Your Property with Ninja Deterrent

How do I stop someone from climbing over my fence or wall?

Secure the top of the fence or gate as a potential place to hands or feet. A climb is a sequence: reach, pull, brace, then hop over. The base at the top is what needs a flat, load-bearing surface, and it is the part where a spiked section shines. That is why reinforcing of a wall is more effective than raising the wall higher.

Start by walking the boundary and finding what an intruder would notice: the garbage bin storage against the side fence, flat garage roof, the low section behind the garden shed, or the drain-pipe next to the gate. Spikes fitted along the front wall, while a wheelie bin sits next to an unprotected side fence solve nothing.

Which series suits which boundary?

Ninja Deterrent makes five profiles, and the choice is mostly a question of what the boundary looks like.

• Classic is the traditional shinobi-gaeshi form, curved hooks on a horizontal rail, in Short (H130), Middle (H340) and Long (H490) heights with single L-shaped or dual V-shaped blades. It suits masonry walls, tiled copings and traditional gates. Section width 530 mm.
• Modern is a low-profile continuous sawtooth, 1,000 mm sections, for contemporary elevations where the deterrent should read as a line rather than an object.
• Gothic is a pointed blade, 1,000 mm sections, single or dual, for metal fences and boundary walls.
• Forest and Iris are ornamental profiles, a tree silhouette and an iris flower, for garden and landscape settings.
• Custom orders cover bespoke profiles, dimensions and materials.

Material follows the environment rather than the series: SUS304 stainless steel near the coast or where roads are often salted in winter, powder-coated SS400 structural steel inland, AL5052 aluminum where the substrate cannot carry much weight.

Frequently Asked Questions

Can the spikes be fitted to any kind of wall or fence?

Brick, concrete, timber and metal can all be retrofitted; what changes is the installation method. The question to ask is not whether the section will fit, but whether the substrate will hold securely under load. Soft old brick, rusted or rotten gate rails and thin sheet cladding need to be taken care of first.

Is this a job for a DIYer?

For a short run on sound masonry or timber, with a drill and the right anchors and a level, yes. Bring in a contractor for longer section installs and sections above head height, on public boundary, and for anything else where the substrate is difficult. Working at height is risky in this job.

Do anti-climb spikes really deter intruders?

They remove the weak point of the climb that needs a stable brace, and they do it visibly, which is effective. Access control of this kind is one of the standards of Crime Prevention Through Environmental Design: change the route rather than rely on detecting an intrusion after it starts.

What maintenance do they need afterwards?

Rinse dirty, check the fixings once a year, and touch up any chip in the powder coating on SS400 that reaches bare steel. On stainless, avoid steel wool and chlorine-based cleaners.

Where can Ninja Deterrent products be bought?

Directly from ninja-deterrent.jp, shipping worldwide from Japan. Trade, specification and project enquiries go through the wholesale page.