How to Set Up a Windowsill Perch Without Drilling

Windowsill perches look like the easiest cat furniture in the catalog. Then you read the fine print and find out that half of them want suction cups and the other half want screws. I live in an old farmhouse outside Ellijay, Georgia, with plaster walls in the front rooms and drywall in the back addition. I did not want holes in either one for a cat bed. The Zakkart windowsill perch caught my attention because the listing says it needs no suction cups and no drilling. It hooks into the slot along the window sill. That sentence is either the whole answer or the whole problem, depending on your window.

We bought the Zakkart perch in May 2026 for the dining room window, the one that looks out at the bird feeder in the side yard. Before I ordered, I measured the slot along the sill with a tape. Our window had a deep enough slot, so the perch went in without Ray touching a drill. Biscuit, our 9-year-old orange tabby, is about 14 pounds and likes to lie flat. Juniper, our 3-year-old gray and white cat, is about 8 pounds and climbs anything. In our house, Biscuit uses the perch most mornings. June uses it when he is not there. The listing says it holds up to 40 pounds. That is more than enough for either cat.

Step 1: Measure the Slot Before You Order

This is the step that decides everything. The listing says the window needs a slot at least 0.5 inches deep for the perch to hook onto. I took a tape measure and pressed the blade down into the slot at three points, one near each side and one in the middle. Our dining room slot was deeper than half an inch at all three. If yours is shallower, the Zakkart perch is not the right perch for that window. Do not order it and hope. The slot is the whole attachment.

I also checked the width. The size L is 24 inches long and 15 inches wide, and the listing gives the overall height as 9 inches and the weight as 3.62 pounds. I wanted to know that the window was wider than 24 inches and that the sill had 15 inches of clear space from the glass outward. A perch can be the right depth and still be too wide for the window. Ours had room, but I have seen narrow kitchen windows that would not.

One more check: look at the slot itself. Old windows collect paint, caulk, and grit. Our front windows have been painted so many times that the slot in the living room is almost filled. The dining room window was clean. If the slot is blocked, the perch cannot seat down into it, and I would not start scraping a window frame just to make a cat bed fit. Pick another window.

Step 2: Clear the Sill and Check the Window

The sill needs to be empty. I took off a small pitcher, a candle, and a stack of seed catalogs before I did anything else. Then I wiped the slot with a damp cloth and let it dry. I did not put down felt or tape because I wanted to see how the perch sat on its own. A clean slot was enough for ours.

I also opened and closed the window a few times. The perch sits in the slot along the sill, and I wanted to be sure the window sash would not catch on the bolsters or the bed when it moved. Our dining room window is a double hung window that we keep closed most of the time, but I still checked. If your window is one you open every day, put the perch in and move the sash slowly before the cats get a chance to try it.

Ray checked the window frame with his hand and gave it a push. He is the one who notices if a sill is loose or if a window is out of square. The perch does not attach to the wall or the frame, so it cannot fix a sill that is already moving. Ours was solid. If yours is not, stop and fix the window first. A cat perch should not be asked to hold a window together.

Step 3: Hook the Perch Into the Slot

This is a two-person job in our house, not because the perch is heavy but because I wanted Ray to hold the window sash while I set the perch. The perch weighs 3.62 pounds, so I could lift it. I set the long side of the perch over the sill and tipped it so the part that engages the slot went down into the slot. Then I let the frame settle onto the sill. There were no screws, no suction cups, and no tools.

I checked the fit by pushing the perch toward the glass and then away from it. It should not slide. Ours sat still. I also put a small level on the flat part of the frame, mostly because I level everything, and it was close enough that I did not fuss with it. The perch sits the way the sill sits, so if the sill is out of level, the perch will be out of level too. That is not a defect. It is the shape of the window.

The bolsters are part of the bed, and they sit at the edges of the cushion. I made sure the cushion was pushed all the way down into the frame before I let go. The listing says the cushion can be removed for cleaning. I have taken it off twice for washing, and it goes back the same way. If the cushion is crooked, the bolsters look uneven and the cats notice. Straighten it before they get in.

The perch does not attach to the wall. It sits in the slot, and the slot does the work. Measure that slot before the box arrives.

Step 4: Test the Weight and Wash the Cushion

The listing says the perch holds up to 40 pounds. Biscuit is about 14 pounds and June is about 8 pounds, so I was not worried about the weight rating. I was more interested in how the perch felt when weight was put on the outside edge. I pressed down with my hand where Biscuit would step, then where June would land. The perch did not lift out of the slot. I would not hang on it or let a child climb on it, but for a cat stepping up, it felt settled.

The cushion is machine washable. The listing says to take the bed off, wash cold, and tumble low. I have washed the cushion twice since May. I let it air dry most of the way and then put it back on while it was still a little damp, which made it easier to fit. The bolsters keep their shape. The frame is hardwood and metal, so it does not go in the washer. Only the cushion does.

After washing, put the cushion back and press it down into the frame. Then put a cat on it, or let them find it. The perch is not a toy. It does not need to be broken in. The first time Biscuit stepped on it, the cushion shifted a little under his back feet and then settled. That was it.

Step 5: Let the Cats Choose It

We did not put treats on the perch or lift the cats onto it. I set it in the window, opened the curtain, and went back to the kitchen. Biscuit found it first, which did not surprise me. He is 9, about 14 pounds, and he has started to take the stairs a little slower. He likes a low, wide surface where he can lie flat. The perch is 24 by 15 inches, and the bolsters give him something to lean against. He was on it the first morning.

June is 3 and about 8 pounds, and she is a climber. She wanted the perch as soon as she saw Biscuit in it, but she did not get it until he got down. That is the household rule, not a product feature. In our house, she uses it in the afternoon when the sun comes around. She sits up on the bolsters and watches the bird feeder. The listing says the perch holds up to 40 pounds, so there was never a question of whether it would hold her.

If your cat ignores it, do not force the issue. Some cats want a high shelf. Some want a window with more activity. Biscuit and June both use this one, but I would not say every cat will. Our two took to it because it was already in a window they liked. If your cat has trouble jumping or has been losing weight or seems stiff, ask your vet about the right height and surface. I am not a vet, and a perch is not a treatment.

What Else Helps

A window with something to watch is worth more than a fancy cushion. Our dining room window looks out at the bird feeder, and that is why the perch gets used. If your window faces a blank wall, the perch may still be a comfortable place to sleep, but it will not have the same draw. I also keep the glass clean on the lower pane. A dirty window turns a good view into a smudge.

Keep the sill clear. The perch needs the slot, and it needs the window to open and close without catching. Do not stack books or plants against it. Do not add a pad under the frame to make it fit. If the slot is too shallow, the Zakkart perch is the wrong product for that window. If the window has no slot at all, this is not a drill-free problem you can solve with a different technique. It is the wrong window for this perch. Pick another window.

If you have more than one cat, think about the traffic. Biscuit is bigger and slower. June is quicker and wants the high ground. The perch is low enough for Biscuit and wide enough that June can use it when he is done. That works in our house. In a house with two cats who both want the same window at the same time, one perch may not be enough. That is not a flaw in the perch. It is arithmetic.

If Your Window Has No Slot

Some windows do not have a slot along the sill. Our old front windows have one, but the newer window in the back addition does not. It has a flat sill and a vinyl frame with no groove. The Zakkart perch will not work there. I did not try to make it work with shims or adhesive strips, because the listing is clear that the perch hooks into a slot. A flat sill with no slot is a different product problem.

If you are set on that window, look at a perch that uses a different attachment, and read what it needs. Do not buy this one and plan to modify it. I have made that mistake with other furniture, and it usually ends with a wobbly shelf and a trip back to the hardware store. Measure first. If the slot is not there, the Zakkart perch stays in the box.