Cat window perch for double-glazed windows

Suction cups and double-glazed windows are a frustrating combination — the smooth, slightly convex surface just doesn't hold the way older single-pane glass does, and a perch dropping mid-nap is the last thing you want. The good news is frame-mounted perches sidestep the problem entirely by clamping to the window frame rather than relying on the glass at all. Before I point you to a specific option, a couple of quick questions: how heavy is your cat, what material is your window frame (uPVC, wood, or aluminium), and is this for one cat or will several be competing for the spot?

That's a horrible moment for both of you. At 5kg on a uPVC frame with just one cat, the K&H Pet Products EZ Mount Window Bed Cradle is exactly what I'd go for. It uses a bracket system that hooks over the top of the window sash and is held in place by the window itself when it's closed — there are no suction cups involved at all. It's rated to around 9kg, so your cat has plenty of margin, and the hammock-style bed is machine washable. The EZ Mount has been around for years and has a strong track record specifically on uPVC frames. It does require your window to close down onto the bracket, so it works best on windows that open outward or tilt-and-turn rather than sash-style — does that describe yours?

Very easy — it takes about thirty seconds to unhook and remount on a different window. There's nothing fixed permanently to the frame, so you can follow the sun throughout the day if you want to. The only thing to check is that the bracket width matches your window sash — the EZ Mount fits most standard uPVC frames but measure the depth of your top sash edge just to be sure before ordering. On Amazon UK it comes in a couple of sizes and usually arrives within a day or two. Given what happened with the suction cup version, I think you'll notice the difference immediately — it genuinely doesn't shift.

The included hammock is decent on its own, but if your cat likes something warmer and more enclosed, you can add a self-warming pad — the K&H Thermo-Kitty Mat cut to size works well inside the cradle and doesn't need a plug. Beyond that, honestly just position it at a window with a decent view of outside activity and she'll sort the rest herself. Birds, passing people, or even a garden feeder hung nearby will give her hours of entertainment. You're solving a real welfare gap for her with this — indoor cats genuinely benefit from a reliable perch spot, and the EZ Mount should hold up for years.