Existing Fence Conversion System for Shorter Fences Kit

Why Purr...fect Fence? For nearly 20 years and with more than 50,000 cats enjoying outdoors safely, Purr...fect Cat Fence is the most popular, effective, and durable cat containment system in the world. Our patented designs ensure that even the craftiest cats can't escape. Purrfect Fence cat enclosures are extremely flexible so they can be installed to an existing fence or wall and used in conjunction with our freestanding kit to enclose unfenced areas. Give your cats the freedom they deserve to enjoy the great outdoors without worrying about their safety! » See Testimonials

Cat Fencing Topper for Chain Link, Wood, Vinyl

The Conversion System for Shorter Fences will allow you to add up to 3' overall to the height of your existing fence... Now you can use Purrfect Fence to Cat-Proof your fence or wall even if it is only 3' high!

❗ Have a fence or wall over 5 feet in height? Use the Standard Existing Fence Conversion System to cat-proof fences and walls 5' or higher!

The Conversion System for Shorter Fences will convert your shorter fence into a escape-proof fence for cats. The 100 ft kit includes an (12) Cat-Proofer spring-loaded arms, extender for each arm, the associated mounting brackets and a 6' tall roll of fence per 100 feet. By comparison, a 50 ft kit includes (6) Cat-Proofer spring loaded arms and 50 feet of fencing material.

Keep in mind that every fence is different and there are no universally followed guidelines for post spacing, height, materials used,etc. A 50ft kit is designed for the average 50 linear feet of fence. 100 ft kit is designed for an average 100 linear feet of fence. A 200 ft kit is designed for the average 200 linear feet of fence. If you have gates, turns, short or long spans between posts then you may find that you need more or less components than comes with the kit. If in doubt, contact us first!

The extension tubes are made of thick 14 gauge steel (an arm set as high as possible on an extension tube can hold well over 50lbs). The scrunched end of the extension tube slides inside of the leg of the Conversion System Arms. The included high-strength epoxy bonds the pieces together. Once glued up, the extended arms slide into two mounting plates spaced a minimum of 4" apart secured to your fence posts with the top mounting plate set as high as possible on your post. Slide the arm to be at the desired height, tighten a set screw on each plate and your arm is secured to your post. Repeat this for all your posts and the fence material is ready to install.

Please note: If the fence is chain link, decorative aluminum or other metal picket fence you will need U-Bolts to secure the mounting bracket to the posts. You can use only one U-Bolt per bracket with this system so purchase one set of U-Bolts per post.

What's Included

Download a printable version of this table.

Existing Shorter Fence Conversion System 50 Foot Kit 100 Foot Kit 150 Foot Kit 200 Foot Kit 250 Foot Kit 300 Foot Kit 350 Foot Kit 400 Foot Kit 450 Foot Kit 500 Foot Kit 550 Foot Kit 600 Foot Kit
Spring Loaded Arms 6 12 18 24 30 36 42 48 54 60 66 72
3 Ring Universal Mounting Brackets 12 24 36 48 60 72 84 96 108 120 132 144
Set Screws 12 24 36 48 60 72 84 96 108 120 132 144
Extension Tubes 6 12 18 24 30 36 42 48 54 60 66 72
6' 600lbs Break Strength Mesh 50 Feet 100 Feet 150 Feet 200 Feet 250 Feet 300 Feet 350 Feet 400 Feet 450 Feet 500 Feet 550 Feet 600 Feet
UV Rated Ties (bags) 1 2 3 4 5 6 7 8 9 10 11 12
Arm to Wall/Structure Hardware 2 Sets 2 Sets 2 Sets 2 Sets 4 Sets 4 Sets 4 Sets 4 Sets 4 Sets 4 Sets 4 Sets 4 Sets
Written Installation Instructions Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes Yes

Download a printable version of this table.

*Fasteners for holding hardware to building/home are not included. Fasteners should be chosen based on the type of material covering the building (wood screw, masonry screw, etc.)

-The above table applies to orders placed after 12/26/19.


Items of note when planning your order/layout:

-Each existing fence is unique! The maximum span between arms is 12-14 feet. 8-10 Feet is preferred. Count and measure the distance between your posts to ensure that your chosen kit will cover your fence layout.

- Keep in mind that our Existing Fence Conversion System for Shorter Fences will provide up to 36" inches of additional height from wherever the upper mounting bracket is secured. So, if the bracket is mounted at the top of a 4FT fence, then the finished Purrfect Fence height can be as tall as 7FT. This is adjustable and can be set at any height you prefer between 12" and 36" above where the uppermost mounting bracket is secured.

- Our patented system works by forcing your cat(s) to climb up the fence which activates the spring-loaded arm from the bottom if they are able to reach the top (most are not.) So, for maximum effectiveness, it is important that the finished height of your Purrfect Fence be tall enough so your cat cannot simply leap over it. For most domestic cats the minimum finished height (measured from the ground to the tip of the Purrfect Fence extension) we recommend is 6FT, though we prefer it to be taller when possible. Even so, we have had customers tell us it was effective for their cat(s) at shorter heights. However, higher is always better and may be necessary if your particular cat or cat breed is capable of leaping higher than the average healthy and athletic (domestic shorthair) cat. 

-Gates in your fence line require special consideration. Read below for more information on gate planning and installation.

Installation Instructions
Chain Link Fence Install Hardware 
PVC Fence & Walls Install Kit 

Installation Video




Gates need to be considered separately for your layout plan. Each gate in your existing fence is likely to need additional components depending on the location and operation.

Inward Swinging Gate

Many inward swinging gates require 1-2 extra arm/bracket(s) per gate. Your situation may vary. If you have any questions please contact us.

Outward Swinging Gate

Many outward swinging gates require 2-3 extra arm/bracket(s) per gate. Your situation may vary. If you have any questions please contact us. 

Customer Reviews

Based on 24 reviews
Don’t wait.

Don’t tell yourself you will do this tomorrow; you and your pet may not have a tomorrow together. I’m sitting here looking out the patio door at my three cats playing so happily in my safely enclosedbackyard. I should be looking at my four cats, but one (Bart) is no longer with me. He was a free spirit and there was no way I could keep him indoors. Bart was my special guy, the feral kitten I raised and loved more than all the others (shhhh, don’t tell them that). One day he roamed into the neighbor’s yard and ingested poison. The vets tried everything but could not save him. He died in my arms.

I now have my Purrfect Fence installed. I thought about doing it for months, but just couldn’t bring myself to take that first step and order it – a mistake with deadly consequences. It is so wonderful to now know that my cats can enjoy the glorious outdoors and be safe. The stress level in the household is gone. Everyone is happy!

Love my Purrfect Fence!

Converting our existing privacy fence was very straightforward. The fence materials are great quality and well-designed. I would recommend this company and its products to anyone who wants a safe enclosure for their cats.

I have two large Maine Coons and don't worry about them getting away!

It has worked fine!

1.5 years so far still going strong.

We first thought enclosing about half an acre was expensive but now realize it was well worth it to banish our constant anxiety for the cats' safety . The neighbors are happy too since I don't have to trespass across their yards and crawl under their porches to retrieve errant wanderers.

The fence was easy to install and does not interfere with our view, blending in almost to invisibility. As an added benefit is it blocks the fall leaves blowing in from neighboring yards!

Most of all the cats are able to play, explore and lead full lives within their protected area. Even our grumpy cat breaks into a smile now and then --when she thinks we aren't watching.

Great for keeping cats safe!

I installed the Existing fence conversion system for shorter fence to my 48" tall vinyl coated chain link fence by myself over a 3-day weekend. I have two gates and installed nearly 200 linear feet of fence that weekend. I have a lot of trees, so most if the first dat was spent with my chain saw clearing limbs and whatnot along the fence line. My least favorite part was the corners because the 2 & 1/2 inch U-bolts for round fence posts are so wide that they are almost too wide for the mounting bracket, so I tried attaching the corner brackets by drilling into post and attaching with screws, but the fence posts are hollow metal cylinders, so... usually what worker best was a hybrid of U-bolts and screws. I also have several trees growing along the fence line, so in addition to trimming limbs, I had to get creative with the netting at the "tree meets fence" sections of the extension system. That being said, once I got it installed and plugged all the gaps along the bottom where the existing fence was too high and my cat was squeezing out underneath, my little "Houdini" (not her name, but... she was quite the escape artist) has not been able to escape the fence. I have an elderly dog who loves her fenced back yard and doggie door, and now she can enjoy her freedom and so can the cats, and I don't have to worry about anyone escaping and getting hit by a car or eaten by coyotes any more! This product definitely works at keep cats corralled! And DIY installation is definitely doable if you're a bit handy. I do a lot of DIY (flooring, light fixtures, cabinetry, painting, etc.), so the fence wasn't too daunting. The only thing about installation (besides the 2 & 1/2 inch U-bolts barely fitting on the brackets was that the installation instructions did not tell you what to do with the set screws. I figured it out when I put the 1st pole in a bracket and it slid to the ground, but I had to go searching in the parts for something to keep the pole from s...

Hi Cara, Thank you for your feedback! We are delighted to find you are happy with your Purrfect Fence! Regarding your concerns with the set screws - we appreciate you bringing this up and we are sorry that you had a hard time with the set screws. We have used the same instructions for 15 years and not a single person has voiced this issue. So without your feedback we would have never known it was a point of confusion. We have now updated our instructions to include a section about how to use the set screws to hold the arm extensions on the mounting brackets! Thank you for helping us continue to improve our products!
Keepe Cats Safe

We all absolutely LOVE our new fence system. It has been up for 4 months. Not one of our cats has even tried to climb out. The customer service and quality of the fence is solid. The nicest most helpful people ever. Make sure you call to discuss before you purchase. The install was a little challenging and took some time but our fence was over 125 feet long. Highly recommend. Would buy again and will never worry about them escaping.

I have four kitties and not one escape to date

I have peace of mind for their safety now. It was definitely a good investment. My husband and I assembled it over a period of a few days. My neighbors can hardly see it (I asked their permission before I even bought it) and I’ve had no complaints from anyone. Purrfect Fence helped every step of the way including all the pieces I needed and answering assembly questions timely. I honestly felt completely taken care of and I’m glad because it was a good bit of money, for me anyway. But like someone said, pay for the fence, or pay for emergency room visit(s) in the thousands. The best part is that I can give my babies a happier and better life being able to go outdoors, and all those days of me worrying if they were going to make it back home in one piece are gone. Thank you so much, Purrfect Fence!

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