The north side of the roof is really mossy — is that bad for the tiles?

How to say “The north side of the roof is really mossy — is that bad for the tiles?” in Japanese

In Japanese

屋根(やね)の北側(きたがわ)、半分(はんぶん)くらい苔(こけ)が生(は)えてるけど、瓦(かわら)に悪(わる)くないのかな？

Yane no kitagawa, hanbun kurai koke ga haeteru kedo, kawara ni warukunai no ka na?

The north side of the roof is really mossy — is that bad for the tiles? in other languages