As an admin, I'm only certain of two roofs being considered a Map Exploit as pointed out in
the rules.
It states "Getting on the roof of the main-building, whether by prop-surfing, or jumping on top, is not allowed. This also includes the small roof on left side when facing the front of the main building." This very clearly highlights which roofs are considered a map exploit, which in the current version of apehouse are blocked off by invisible walls.
However, I have heard that the small, side roof above the door on the right side next to the white care on the right hand building, while facing the front of the buildings, but I have only heard it through the grapevine and have not seen anything about that location being "off-limits" elsewhere aside from another admin telling me that another admin said it wasn't allowed.
How I see the rules, it clearly states that only two roofs are strictly prohibited, but it also specifies which roof is allowed. It does not prohibit being on other roofs, but it also doesn't necessarily allow it. Personally, I don't see an issue with any other roofs aside from the main building, but that's just me.