A place in the sun: setting a cat up at the window

A cat watches from a high point: that is a species need, not a whim.

A window sill is almost always too narrow — it cannot lie there full-length.

A suction cup on greasy glass lets go overnight, with the cat on it. Cleanliness at fitting decides everything.

In the shop: Hook hammock — the window corner, taken and Window perch — a shelf fixed to the glass.

A house cat spends a large part of its day observing. Not sleeping: watching. Outside movement — birds, passers-by, leaves — occupies an attention that otherwise turns inward on the home, and that is often where so-called destructive behaviour starts.

The window combines three things nowhere else does: light, warmth, and a flow of information. A cat deprived of that window does not become unhappy, but it loses an occupation, and a lost occupation is rarely replaced by rest.

There is also height. A cat prefers to watch from above, because the dominant position is where it feels safe. That is why a bed placed on the floor in front of a patio door gets used less than a shelf at eighty centimetres.

A standard window sill is ten to fifteen centimetres deep. An adult cat lying full-length takes forty to fifty. It can therefore only sit there, which limits the stay: after a few minutes, it gets down.

Practical constraints add up. The sill is often occupied — plants, objects — and it gets very hot in summer behind exposed glass. A cat abandons a bed that is too warm without anyone understanding why.

A suction hammock settles all three: it fixes to the glass itself, so it does not take the sill; it is forty to fifty centimetres wide, so the cat lies on it fully; and it lets air pass underneath, which prevents heat building up.

A suction cup does not hold by magic. It holds because no air passes between it and the glass. Three conditions, and they are cumulative: the glass must be clean — degreased, not merely wiped —, dry, and at room temperature. Cold winter glass reduces adhesion noticeably.

The method that works: clean with household alcohol, let it dry, dampen the cup very slightly, press firmly while pushing air out from the centre. Then wait an hour before letting the cat climb on.

A monthly check is needed. A suction cup relaxes slowly, and the early sign is a faint ring of air around the edge. A push in the centre puts it back.

Finally, if the glazing is treated double glazing — some coatings reduce adhesion — the alternative is a wall shelf fixed just below the window. Less elegant, but it does not fall.

Eighty centimetres is the useful minimum. Below that the cat has no overview and the setup loses its main point. Between eighty and a hundred and twenty, an adult cat gets up and down effortlessly.

The choice of window matters as much as the height. A window onto a busy street or a frequented garden will be used ten times more than one facing a blank wall. If the home offers several, equip the one with the most movement.

One last point, often forgotten: leave an approach. A hammock at eighty centimetres with no furniture nearby forces the cat to jump from the floor, which an older or heavier animal will avoid. A chair, a chest, any intermediate step will do.