Upgrade the fence you have
Add a visible deterrent to discourage climbing over your boundary fence.
Worried your fence is easy to climb?
Add a deterrent with Designer Guard fence spikes.
Help deter unwanted access to your property with Designer Guard steel fence spikes. Add an anti-climb feature to your existing fence, choose black or galvanised, and use the calculator below to work out how many packs you need.
12 × 1.25 m strips. 15 m total. End-to-end joins.
15 metresof material per pack
12 × 1.25 mstrips that meet end to end
Two finishesblack or galvanised steel
Project supportfrom the Designer Plants team
Choose your finish
Choose black to complement dark fencing or galvanised for a silver metal finish.
Work out your quantity
Enter your fence measurements in the calculator below to find the number of strips and packs you need.
One system. Two finishes.
Choose the finish for your fence
Choose black or galvanised. Both packs contain 12 strips, each 1.25 m long, for a total of 15 m.
Black
$349.95
$23.33 / m
A black finish that complements dark fencing and contemporary homes.
Availability: Available to order
12 × 1.25 m stripsView product
Galvanised
$349.95
$23.33 / m
A silver galvanised finish that suits metal fencing and commercial boundaries.
Availability: Available to order
12 × 1.25 m stripsView product
Your DIY upgrade
Measure. Calculate. Order.
Measure your fence, then enter the length below. The calculator works out your strips and packs for you.
Measure your fence
Measure each separate fence or gate section in metres.
Enter your measurements
Add a separate entry for each section. The calculator rounds each section up to a whole strip.
Order your packs
Use the pack total to order your preferred finish. Each pack contains 12 strips.
How many packs do I need?
Enter each fence section in metres. Add another section for a gate or a separate length of fence.
Each strip is 1.25 m long. Each pack contains 12 strips (15 m). We round each section up to a whole strip.
Ready to fit
Place. Screw. Repeat.
Fit the strips along the fence top, one section at a time.
Wear protective gloves and eye protection when handling and fixing the strips.
Place the strip
Place the strip onto the fence top and align it along the edge. Fix into sound supporting timber or metal.
Choose the right screws
Use timber screws for a timber paling fence, or metal screws for a metal fence. Choose a 10 mm (1 cm) wide head and a screw length suited to the supporting material.
Secure and repeat
Secure the strip through its fixing holes, then place the next strip end to end. Check each strip is secure and keep gate movement clear.
Choose the look for your boundary
Black complements darker fencing. Galvanised brings a silver metal finish. Both come in the same 12-strip pack.
Black finish
Galvanised finish
Need a hand?
Get help with your fence
Send a photo and your fence length. We can help with product questions or larger orders.
Good to know
Fence and home security FAQs
Clear answers about fence spikes, quantities and protecting access to your home.
How can I make an existing fence more secure?
Repair loose panels and damaged posts, and check that gates close and lock properly. Keep ladders, tools and bins away from the fence. Once the fence is sound, Designer Guard can add a visible deterrent to climbing.
How can I make my home more secure?
Start with secure doors, windows and gates. Check side and rear access, improve lighting around entrances, and keep valuables out of sight. Use several measures together: a fence-top deterrent is one part of a wider home security plan.
How can I improve side-gate security?
Make sure the gate closes fully and the hinges, latch and lock are secure. Keep it locked when not in use. Check lighting along the side passage and move anything that could make the fence easier to climb.
Will fence spikes prevent someone from entering my property?
Designer Guard is designed to deter climbing over your fence and help discourage unwanted access. It works alongside secure gates, doors, windows and lighting. No fence-top product can guarantee that an intruder will be kept out.
What should I check before buying a fence topper?
Measure each fence section and check that the strips can sit on a sound supporting rail or cap. Allow for corners and gate movement, then choose your finish and suitable fixings. Send us a photo if you are unsure about the fit.
Will Designer Guard fit a Colorbond, timber or metal fence?
The shape and condition of the fence top matter as well as the material. Check that there is a sound rail or cap to support the strips. Use timber screws for timber or metal screws for metal, with a 10 mm-wide head and a length suited to the support. Send us a photo if you need help.
How do I install Designer Guard fence spikes?
Position a strip on a sound fence top and secure it through the fixing holes with screws suited to the supporting material. Fit the next strip end to end and repeat. Follow the fitting steps above, wear gloves and eye protection, and keep gates free to open and close.
What is included in a Designer Guard pack?
Each pack contains 12 steel spike strips, each 1.25 m long, for a total of 15 m. Black and galvanised packs contain the same quantity. Check with us whether the fixings you need are included before ordering.
How many packs of fence spikes do I need for a 16 m fence?
For one continuous 16 m fence section, you'll need 13 strips, so order 2 packs. You'll receive 24 strips in total, leaving 11 spare. If your fence has separate sections or gates, enter each length in the calculator above.
How do I calculate quantities for separate fence sections and gates?
Measure each section separately and add it to the calculator above. It rounds each section up to a whole strip, then works out your total packs. It does not assume that an offcut from one section can be used on another.
Should I choose black or galvanised fence spikes?
Black complements darker fences, while galvanised has a silver metal finish. Both options come in packs of 12 strips, each 1.25 m long. For coastal or other exposed locations, ask us about the finish and care requirements before ordering.
What should I send if I need help with my fence?
Send a clear photo of the fence top, the length of each section, your preferred finish and your postcode. Include any corners or gates. We can help with quantities, product questions and larger orders.
Is burglary increasing in Victoria?
The latest annual ABS figures show a fall: Victoria recorded 42,692 burglary victims in 2025, down 7% from 2024. Around 62% were at residential locations. Check local crime data and review the security of your own fence, gates and entrances, whatever the statewide trend.
Is crime rising across Australia?
The national picture is mixed. ABS figures for 2025 show motor vehicle theft increased by 2%, while robbery fell by 8% and other theft fell by 2%. Different offences and locations have different trends. For your home, focus on practical steps to secure gates, doors, windows and other access points.
Why should I secure side passages and the back of my property?
Side passages and backyards can provide access to rear doors, windows and garages that are less visible from the street. Check these routes as carefully as the front entrance. Keep gates locked, maintain the fence and improve lighting. Designer Guard is intended to discourage climbing over a suitable boundary fence.
Can a doggy door be a security risk?
Yes. ACT Policing has reported intruders entering a home through a pet door. Include doggy doors in your security checks and secure them when they are not in use. Fence security is an extra layer; it does not replace securing openings into the house.
Should I lock doors and windows when I'm at home?
Do not assume an open or unlocked door is safe just because someone is home. Police warn that opportunistic offenders look for unsecured doors, windows and pet doors. Check rear and garage doors as well as the front entrance, and keep emergency exits easy to open from inside.
How do fence spikes fit into a home security plan?
Designer Guard adds a visible anti-climb feature at the boundary, intended to deter unwanted access before someone reaches your backyard. Combine it with a sound fence, locked gates and secure doors and windows. Consider lighting and alarms as part of the same plan.
Crime figures and home security sources checked on 17 September 2026.