Question
Hello thanks for your good answer.  No, I am not the Violet you have been corresponding with.  This is the first time I ask you a question.

The moss is on the patio which consist out of paving.  It indeed does not get a lot of sunlight.  The treatment should also not be damaging to my cats.  Which one would be the best treatment?

Many thanks

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Followup To
Question -
Hello
I have a lot of moss on my terrace.  When it rains it becomes slippery ie. dangerous.  How can I remove this moss so that it does not come back?
Many thanks
Answer -
Hi Violet;
I answer a questioner named Violet a lot on allanswers,com.
That wouldn'r be you too, would it?
Moss is a fungus, and the reason for it is not enough sunlight. Is there a way you can get more sun on to that area? Like thinning out some tree or shrub limbs?
Sunlight on the area should cure it, if it was enough sun for at least an hour or so a day.
Other than that, a fungicide is the way you need to go, and the moss will die but come back again as soon as the fungicide is washed away.
I use an organic gardening program, so for fungicide I use baking soda disolved in water. I disolve about half a small box of baking soda in a couple gallons of water are spray leaves, underneath and on top, and the stems of plants and shrubs for molds, a fungus, like black spot and powdery mildew. You would want to saturate the mossy area thoroughly. If there are no plants or grass in the area you would be treating, strong clorox water would work too. Too much clorox will damage plants and grass though.
The best chemical fungicide i found is Funginex.
The moss will come back when the protection wears away. The only way to get rid of it permantely is to get a source of sunlight on the area.
Charlotte

Answer
Hi Violet;
just thought you might be the same one. she is into gardening, cooking, crafts, about all the things I answer on boards for.
She asks very intellegent questions.
For the safety of your cats, I would use baking soda.
You might secure them in the house, scrub the area down with straight clorox,or maybe half clorox and half water.
When all the moss is dead and scrubbed away, neutralize the clorox by pouring white vinegar on it, full strength.
It shouldn't take a lot of clorox, just enough to wet the moss pretty well. White vinegar will neutralize clorox.
I always was so careful around little ones, but when my youngest was 2-1/2 years old, he drank some clorox. I doused some white vinegar down his throat and swooped him to his doctor's office. The vinegar neutralized the clorox so fast and so well, it didn't even burn or irritate the inside of his mouth. It should make it safe for your cats. You never know, cats might lick the stuff. they will be attracted to and eat weed killers.
a washdown with baking soda disolved in water should work if you keep an eye on the area, and mop it down as soon as you see mold start.If the baking soda doesn't kill it when it starts to reappear, got the route with cloroc water.It should take a weaker solution of clorox in the water to keep it cleared up. just make sure the pavement is dry before the cats get back out on it. The clorox water might irritate their little pads, especially if they tend to have allergies. Clorox does evaporate, so as long as the pavement is drt, I don't think there would be odor to attract them, or taste for them to lick up.
Might be a good idea to check this out with your vet first. There may be something about cats and clorox I have not heard about. I have not had as many cats as I have had dogs.
Raising cats and dogs is just like raising kids, you never let your guard down.
Being a mom is not easy whether they have 2 legs or four.LOL
Charlotte