This den ceiling was a high 17-foot ceiling. Standard homes have 8 to 9 foot ceilings, and a 10-foot ceiling is considered generous. So, while a 17-foot ceiling impressively opens up a room's spaciousness, it did make our mold treatment a bit more challenging. Of course, we were up to the job and our mold crew routinely deals with mold growth in hard-to-reach locations. It may take a little more time, but we get the job done.