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Animal Deterrent Spikes, A Practical Buyer's Guide
The problem these solve
There is a moment most people recognize. You look out the window and the same cat is strolling along your fence rail like it owns the place. Or the shed roof has turned gray with pigeon mess. Or you find a bin lid flipped off again and muddy prints on the gate post.
The frustrating part is that none of it is random. Animals take the easiest route available. A fence rail, a window sill, a parapet, a beam over the porch, all of these are flat, stable and quiet. They are roads and they are resting spots. Remove the flat surface and the route stops being easy.
That is the whole idea behind animal deterrent spikes. They are not a trap and they are not a punishment. They are a way of saying the surface is no longer comfortable, and most animals accept that answer and go somewhere else.
How spike strips work
Look closely at a strip and you will see the points are not all the same height. There is a mix of long and short. That combination is deliberate.
Tall points on their own can be stepped between by a careful animal, especially a cat, which is better at balancing than almost anything else in your garden. Short points on their own can simply be stood on if the animal is determined and the pads are tough. Mixing them means there is nowhere flat and nothing predictable. A bird coming in to land feels the surface shift and aborts. A cat testing the rail with one paw does not like the feedback and backs off.
The second part of the effect is visual. Animals read a bristling surface as risk before they even touch it. Many never make contact at all. Over a week or two the route simply drops out of their habit.
Where to put them
The honest answer is wherever the animal actually goes, not where you think it should go. Spend a day watching, or look for the clues. Smudged paint, worn moss, droppings in a line, scratch marks on a post cap. Animals are creatures of routine and they leave evidence.
Common spots include fence top rails, gate tops and gate post caps, garden wall tops, shed and garage roof edges, window sills, air conditioner housings, meter boxes, pergola beams, railing tops and the flat lip of a gutter run. Pigeons especially love anything with a view and a bit of shelter above it.
With 40 strips you have a serious amount of coverage. End to end that is around 37 feet. Most people split it between one long run, usually a fence or a roof edge, and several short patches on sills, posts and boxes.
Getting the coverage right
This is where installs succeed or fail, so it is worth being blunt about it.
Gaps ruin spikes. If you leave a 6 inch bare section in the middle of a rail, a cat will find it within three days and step across. Birds are the same with ledges, they will land in the one uncovered patch and carry on as before. Spacing strips out to make the pack stretch further feels economical and almost always disappoints.
Cover the full width too. On a fence capping board that is wider than a single strip, you may need two rows side by side, otherwise an animal simply walks the uncovered half. The same applies to wide wall tops and chunky post caps.
Cutting is your friend here. Each strip is made to be divided, so you trim the last piece of a run to length rather than leaving a stub uncovered. Snips work well, and a sharp utility knife on a stable surface does the job too. Work slowly and keep your fingers behind the blade.
Choosing your fixing method
There is no single right answer. It depends on what you are fixing to and whether you want it permanent.
Screws or nails are the strongest option on timber fences, posts, beams and sheds. They take the longest to fit and they leave holes, but they will not move in a storm and they do not care about temperature. If you are fitting to a fence you own and expect to keep for years, this is the sensible route.
Outdoor adhesive or strong double sided tape suits smooth masonry, render, metal and plastic surfaces where drilling is a bad idea, such as a rental property, a clean rendered wall or a sealed parapet. The catch is preparation. Tape sticks to clean, dry, dust free surfaces and nothing else. Wash the surface, let it dry completely, and fit on a mild day rather than in heavy sun or freezing cold.
Cable ties are the quiet hero for mesh fencing, railings, pipes and anything round. They are fast, they are reversible and they hold surprisingly well. Choose UV stable ties if you can, since cheap indoor ties go brittle after a season outdoors, and trim the tails so they do not flap.
Materials and weather
These strips are acrylic plastic. The practical benefit is that there is no rust, which matters if you are fitting near a painted fence, light render or anything where a rust streak would be obvious. Metal spikes can stain, plastic ones do not.
Plastic also keeps the weight down. The whole 40 pack is listed at 3.4 pounds, which is around 1.54 kg, so individual strips are almost nothing. That is useful on a thin top rail, a vinyl gutter edge or a lightweight panel that would not take heavier hardware.
Outdoors, plastic handles sun, rain and frost without deforming. What it does not do is shrug off a build-up of wet leaves or snow sitting between the points. Clearing that occasionally keeps the deterrent effect honest.
Living with them
Maintenance is light. Once or twice a year, hose the strips down or wipe them with a damp cloth. If there is sticky residue or droppings, mild soapy water and a soft brush will shift it. Skip solvents and scouring pads, which can dull the plastic over time.
The other job is checking fixings. After a big storm, run your eye along the line and give a few strips a gentle push. Tape can lift at the edges, cable ties can loosen, screws can back out of weathered timber. Two minutes of checking saves a whole section peeling off in the next bout of wind.
If you have pets, watch them around newly fitted areas for the first week. A cat that has used your own fence for years may need a little time to pick a new route, and you may want to give it an easier alternative, such as a clear post or a bit of uncovered wall away from your beds.
When spikes are not enough on their own
Be realistic about what a spike strip does. It blocks a surface. It does not remove the reason the animal came.
If bins are easy to open, raccoons will keep trying. If there is pet food left outside, cats will keep visiting. If a tree branch overhangs the roof, birds have a different runway. Spikes work best as one part of a simple plan. Secure the food, trim the obvious bridge, then take away the comfortable perch. Done together, that combination usually settles things within a couple of weeks.
The short version
You get 40 trimmable acrylic strips, each about 11.21 inches long, with a mix of long and short points. They stop birds and climbing animals from using flat surfaces as landing pads and walkways.
Cover the whole run with no gaps, cover the full width where the surface is wide, and pick a fixing that matches the material. Screws for timber, adhesive or tape for smooth clean surfaces, cable ties for mesh and railings.
Rinse them now and then, check the fixings after storms, and deal with any food source that is drawing animals in. Do that and a fence rail that was a highway last month quietly stops being one.