Do Minecraft monsters spawn on stairs?

minecraft-java-edition

I'm building a house and using stairs for the look of the roof. Will monsters spawn up there at night (assuming I'm sufficiently far away)? Do I have to put torches up there to prevent that?


Solution 1:

You do not need to put torches up there. Passive mobs spawn on grass only (at least in grassy areas...), aggressive mobs spawn on cube-blocks only. No steps, no slabs etc.

Edit. As mentioned in comments, monster can be spawned in upside-down stairs, at least in 1.4.6 version (which is old, though)
Here you may check it for 1.8 version:

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