Cat window perches: what cats want from a view, and how to mount one that holds

A cat window perch is two problems wearing one product name. The first is behavioural: will the cat use it, which is almost entirely a question of where you put it. The second is structural: will it stay on the wall, which is a question about your wall and your fixings and barely a question about the shelf at all.

Most writing on this subject covers neither. It describes cushions. So this article covers the two that matter, and it includes a published finding about wall-mounted cat furniture that does not flatter the thing we sell.

Start with the finding that costs us money

The largest owner survey on cat scratching behaviour we are aware of is Wilson et al. (2016), published in the Journal of Feline Medicine and Surgery, with 4,105 usable responses. It is indexed on PubMed and there is a free full text copy at eScholarship.

Two of its findings are relevant to us and both are awkward.

Cats in that survey used wall-mounted furniture least of all the options offered. Multi-level cat trees and simple vertical posts were used most. And among owners reporting unwanted scratching elsewhere in the home, wall-mounted posts were associated with the highest rate of it, at 74.1 percent, compared with 55.3 percent for cat trees with one or more levels.

Now, the honest caveats, which matter. That survey asked about scratching posts, not beds. A wall-mounted perch is not a wall-mounted scratching post, and a cat that ignores a vertical surface fixed to a wall is not necessarily a cat that will ignore a padded shelf in a window. The data is owner-reported rather than observed, and association is not cause: it is entirely possible that people buy wall-mounted posts because they already have a scratching problem.

But we are not going to pretend the closest available evidence to our own format points the other way. It does not. What follows from it is not that wall-mounted furniture does not work. It is that wall-mounted furniture has a narrower margin for error on placement than a cat tree does, because you cannot nudge it eighteen inches to the left after you have drilled.

So get the placement right first, then drill.

What cats are actually doing in a window

The 2013 AAFP and ISFM Feline Environmental Needs Guidelines are the most useful reference here, and they are free. The full document is hosted by the American Association of Feline Practitioners, with a landing page here.

The guidelines are built on five pillars: provide a safe place; provide multiple and separated key environmental resources; provide opportunity for play and predatory behaviour; provide positive, consistent and predictable human and cat social interaction; and provide an environment that respects the importance of the cat's sense of smell.

The first pillar is the one a perch serves. The guidelines note that a safe place is often "in a raised location," and state directly that "access to an elevated area increases the cat's vertical space and allows it to monitor its environment."

That last phrase is the whole design brief. The function is surveillance from a position of safety. A cat on a perch is high, has its back to a wall, can see what is coming, and can see out. It is not primarily about the view in the way we mean when we say we like a view. It is about being able to watch without being approached.

Two more specifics from the guidelines are worth lifting out, because they turn into measurements:

• "Perches should be wide enough and long enough to allow the cat to fully stretch."
• "A hammock-style dip in the middle of the perch or shelf will aid the cat's sense of feeling hidden."

A cushion that sags slightly in the middle is doing something, in other words, and a perch that is too short for a full stretch is compromised regardless of how nice it looks.

What that means for sizing, and our own numbers

Ours is 24.4 by 11.8 inches. For an average domestic cat, 24.4 inches of length is enough to stretch out along. The 11.8 inch depth is the number we would flag: it is enough for a cat to lie along the perch comfortably, and it is not generous for a large cat who wants to curl sideways or for a Maine Coon who is going to overhang it. If you have a cat at the large end, measure your cat nose to tail base while they are stretched out asleep, and buy to that number rather than to ours.

Placement, in order of importance

A sightline out. The guidelines recommend indoor resting areas placed where the cat can see outdoors. A perch on an interior wall facing a hallway is a shelf. A perch at a window is a perch. Within a window, prefer one that looks onto something that moves: a street, a bird feeder, a garden. A view of a blank fence is a worse view.

A reachable approach. This is the one people get wrong. A cat needs a route up that does not require a single ambitious jump. A windowsill, a chair back, a chest of drawers, or a second lower shelf. Fix the perch at a height your cat can get to from something that is already there, or install the thing it will climb at the same time.

Height, but not maximum height. Higher is generally better for a cat's sense of security, up to the point where getting down becomes a problem. For a healthy adult cat, somewhere between waist and shoulder height on an adult human is a sensible band. For an older cat, or one with any mobility issue, lower and with an intermediate step.

Not in a route the cat already avoids. If your cat does not go into that corner of the room now, it will not start because there is a shelf there.

Sun and heat. South-facing glass in summer gets hot. A cat will usually self-regulate and move, but if that perch is the only elevated resting place in the room, you have removed the choice. The guidelines emphasise choice of resources repeatedly: a minimum of two resting areas, each in its own location.

The structural half

This is where people stall, and the fear is reasonable: a shelf coming off a wall with a cat on it is a bad outcome. The good news is that the engineering is ordinary.

Fix into framing wherever you possibly can. A lag screw into a wood stud is in a different category of strength from any drywall anchor. Everything else in this section is about what to do when you cannot.

Do not assume 16 inches on centre. This is the single most common mistake. Sixteen inch stud spacing is extremely common in American houses, but the code permits more. Table R602.3(5) of the residential code, reproduced in the Seattle Residential Code chapter on wall construction, allows 2 by 4 studs at 24 inches on centre in a nonbearing wall and in a bearing wall supporting only a roof and ceiling, with 16 inches required where the wall carries a floor as well. So measure and find your framing. Do not count sixteens along from a corner and drill.

Find the studs properly. An electronic finder is worth the small cost. Confirm with a second method: tap along the wall and listen for the change from hollow to solid, then drive a fine finish nail where you think the edge is and feel for wood. Mark both edges so you can aim for the centre.

Know what your wall is. Half inch drywall on wood framing is the common case. Plaster and lath behaves differently and is often stronger than it feels, but it crumbles at the hole. Masonry needs a masonry anchor and a hammer drill. Metal stud framing, common in apartment buildings, needs fixings rated for metal stud and will not take a wood lag screw.

If you truly cannot reach framing, use the heaviest-rated toggle-style anchor your wall thickness allows, use every mounting hole the bracket provides rather than a subset, and accept a lower working load. Then test it with your hand before you test it with your cat: hang your weight off the front edge briefly. If it moves, it fails.

Renting? A perch that needs two lag screws leaves two fillable holes, which most landlords treat as normal wear. Check your lease. If drilling is genuinely not an option, a floor-standing option is the better answer and we would rather you bought a cat tree than a perch you cannot fix properly.

What we have not tested

We have not published a load test on this perch. We can tell you it has two steel legs and what the fixing pattern is, and we are not going to quote you a weight rating we have not measured ourselves on a representative wall, because a number from a supplier spec sheet is not the same thing as a number we stand behind. When we run that test, with a stated method, it gets published here.

The short version

Put it at a window, at a height your cat can reach from furniture it already uses, fixed into framing you have actually located. Buy it long enough for your cat to stretch out on. Keep a second resting place elsewhere in the room so the perch is a choice rather than the only option. And weigh the Wilson survey honestly: cats used wall-mounted furniture least, which is a reason to be careful about placement rather than a reason to avoid the format.

Our perch is 24.4 by 11.8 inches, on two steel legs, with a washable cushion, at $69. If your room has the floor space for a cat tree instead, a tree gives your cat climbing and scratching as well as a lookout, and the survey above suggests cats use them more. We sell one of those too, and we would rather you bought the right one.