OK perhaps I can pick your brains on this one because I'm out of ideas. We've got a three legged kitty, back leg missing so she's limited in her ability to jump up (allegedly) and is an indoor only cat. Bizarrely while being completely obsesively human-oriented (to the extent she'll never willingly leave your side if you're in the house with her), she's also always had a complete escape and run tendency to her - and if she gets out of the house she will never ever ever come if she's called or your looking at her - you have to leave the door open and essentially catch her when she wanders back in herself... I have no idea WHY she does this, but she always has. What she lacks in ability to climb, she makes up for in sheer ingenuity - in the past she's climbed via picnic basket > laundry basket > kitchen bench to get out of windows, she's gone up her cat tree and along the bookshelf to get onto the humans' desks and sit blocking the view of their PC screens for a cuddle... she is incredibly intelligent and a complete escape artist (I think it's just her hidey hole obsession gone mad to be honest).
Anyway - the only way to get the temperature bearable in here is to have the back patio doors open - which of course brings us back to the escape artist tripod problem - we did have a waist high piece of cardboard that we could hook over the door and block her in that way, but she managed to escape yesterday and had to be physically prised off a 7 foot high garden fence - I'm somewhat more ventillated for doing that.
What we're looking for is a non-permanent (the house is rented) way of making a screen that's about just higher than waist height, or will block the entire door over completely in something that will let air through but not let furball through (we also have a tonne of cats around here who are always in our back garden so need to keep them out) - but we're skint so it has to be a relatively decent cost solution and we can't fix anything that's going to damage the structure of the house... anyone got any ideas because my husband's vile and tetchy in this heat, the cat's suffering in this heat and I'm suffering with both of them in lousy moods!