A catio is a purpose-built outdoor enclosure where a cat gets outside air without leaving a contained area. Cat protection net is the wall material that makes most catios work: it is light, it lets air and light through, and it is the same netting this site supplies for balcony and window protection. What the net cannot do is replace a frame, a roof decision or an inspection routine. This guide walks through those pieces in order, because the typical catio failure is not a hole in the mesh — it is a gap at the edge, a roof the owner never planned, or a door panel that never closes properly.
This guide covers enclosures built around a frame. If the goal is to enclose an existing balcony with no overhead, that is a different project, covered in the open-top balcony guide.
Start From the Enclosure, Not the Net
Before ordering mesh, write down what the enclosure must actually do: which cats will use it, whether it is for short supervised sessions or all-day access, where the door will be, whether it sits in sun or shade, and who maintains it. The answers change the material choice.
Cat behavior is part of this step. A cat that climbs and chews changes the mesh decision more than the size of the enclosure does. The multiple-cats guide shows how to record that behavior instead of guessing from breed or age. No net on this site is marketed as bite-proof or escape-proof, and this article makes the same point: the mesh is one layer in a containment design that includes the frame, the fixings and the routine checks.
Build the Frame First
The net hangs on a frame; it does not hold one up. A timber or metal frame has to stand on its own, resist wind loads with the net attached, and provide a continuous fixing line along every wall, the roof line and the ground line. The frame itself is outside the net supplier's scope, and it usually deserves its own design and approval process.
Frame questions worth answering before any mesh order:
- Is the enclosure freestanding or attached to a wall, fence or deck? Each case has a different fixing line.
- Where are the door opening and any hatch or service opening? The net needs a deliberate panel there, not a slit cut later.
- How far apart are the uprights? Wide spans need stiffer members or intermediate supports so the mesh is not the load path.
- Who checks the frame over time? Timber outdoors moves and weathers; the net inspection routine should include the frame.
A net stretched onto a weak or moving frame will sag, pull fixings loose and open gaps — none of which is a mesh-quality problem.
Nylon or Wire-Reinforced: Choose by Cat and Visibility
MaxCatNet's range offers two real materials, and the catio decision between them is honest and simple.
The transparent nylon cat protection net is made from thin, UV-stabilized monofilament. It is light, nearly invisible from a few meters away, and it preserves the view through the enclosure. It suits calm cats, supervised enclosures, and buyers who want the enclosure to look as open as possible.
The stainless steel wire-reinforced cat net puts a steel wire core inside each strand, which makes it far more resistant to clawing and chewing damage. It is more visible and heavier to handle, and it is the stronger choice for determined cats, unsupervised access, or enclosures where a damaged panel would not be noticed for days.
Whichever material is chosen, the buyer should confirm the mesh opening and strand details for the exact product rather than judging from a photograph. The mesh size and strand diameter guide explains how those two numbers are read so nylon and wire-reinforced products are compared fairly.
Roof, Door and Ground Line Are the Failure Points
Three places decide whether an enclosure actually contains anything, and none of them is the middle of a wall panel.
The roof. Cats jump and climb, so an enclosure meant for unsupervised use needs a covered top rather than open walls. The roof can be netting on its own frame section, but it must be a planned panel with its own fixing line — the same logic as the walls, applied overhead. If the enclosure sits against a house wall, the junction between roof net and wall is the seam to design first.
The door. A catio door is a frame within the frame. It needs its own panel, a closure that stays closed, and a check that it actually shuts every time it is used. A net panel draped over an opening with a weight at the bottom is not a door.
The ground line. The bottom edge of every wall must meet the ground or the base frame without a crawl gap. Skirt panels, buried edges or a continuous bottom rail all work, but the edge has to be fixed along its full length. A loose bottom edge is the most common way an enclosure quietly stops containing anything.
Fixing Net to the Frame
The net edge is where strength and weather both concentrate. On a timber catio, the practical approach is a continuous fixing line — for example, netting fixed along battens so the edge is held every few centimeters rather than at a few points. Where panels meet, they should overlap and be joined along the seam. Corners are where three fixing lines meet, and they deserve the same care as the edge finishing and fixing points guide describes for balcony work: the same failure logic applies to a garden enclosure.
The mounting surface matters as much as the net. Timber, metal and masonry each take fixings differently, and the mounting substrate survey lists the questions to ask about the surface before choosing a fixing method. An enclosure builder should walk that survey for every surface the net touches, including the house wall if the catio is attached.
Outdoor Exposure and the Inspection Routine
A catio lives outdoors year-round, so the net sees sun, rain, wind and temperature swings that a window installation does not. UV exposure is the honest long-term question for any plastic or coated material, and the UV exposure and weathering guide explains what a buyer can and cannot confirm from a specification — this article makes no service-life promise, because none is available.
The practical control is a routine: walk the enclosure on a fixed schedule, look at every edge, seam, corner, roof junction and door closure, and photograph anything that changed. Between inspections, a quick visual pass when the cat is let in catches most new gaps early. The inspection is the part of the design that never shows up in a quotation, and it is the part that keeps the enclosure honest over the years it will stand outside.
Measure and Order by Panel
Catios are ordered as panels, not as one huge rectangle. Measure each wall, the roof section and the door panel separately, and keep the panel list with the order so production and installation follow the same map. The measurement guide gives the field method for a single opening; a catio simply applies it several times over.
Then decide the order format. Buying rolls versus pre-cut panels changes who does the cutting and how much waste the project carries, and multi-panel orders need the cut-panel identification discipline so each panel is labeled by wall and orientation. A five-panel catio with unlabeled panels is a puzzle on install day.
Material Choice for Catio Walls at a Glance
| Decision Point | Transparent Nylon Net | Wire-Reinforced Cat Net |
|---|---|---|
| Visibility through the mesh | Nearly invisible at a distance | More visible, darker line |
| Weight and handling | Light, fine monofilament | Heavier strands with steel core |
| Resistance to clawing and chewing | Lower; suits calm, supervised use | Higher; suits determined cats and unsupervised access |
| Frame load | Lower | Higher; frame must carry it |
| Typical catio fit | Calm cats, view-focused enclosures, short sessions | Long unsupervised access, strong climbers or chewers |
Common Questions
Does a catio need a roof?
If the enclosure is meant to contain a cat without supervision, yes — open walls can be climbed or jumped. A roof panel is netting on its own planned frame section, with the junction against any house wall designed as carefully as the walls themselves.
Can transparent nylon net hold a determined cat?
Nylon monofilament resists ordinary clawing but is not chew-proof, and no net on this site is marketed as escape-proof. A cat that actively works on the mesh with claws or teeth is the clearest signal to choose the wire-reinforced product and to inspect more often.
How much net should I order?
Order by measured panel, not by a single area number. Measure each wall, the roof section and the door panel separately, keep the panel list with the order, and let the supplier or an installer review the dimensions before production.
Related Reading
- Cat Net Mesh Size and Strand Diameter — read the two numbers that define each product before choosing one.
- Cat Net Edge Finishing and Fixing Points — the edge is where enclosure failures concentrate; the same discipline applies to a catio.
- Open-Top Balcony Cat Net Planning — if the project is actually an existing balcony without overhead, this is the guide to start from instead.
Send MaxCatNet the enclosure sketch, panel list with dimensions, cat behavior notes, preferred material, and any questions about the fixing line, and the team can check the order against the actual product specifications.