Forum Discussion
TucsonJim
May 04, 2015Explorer II
The air that is trapped between the inner and outer skylights provides a level of insulation that minimizes heat and cold in the bathroom. On a cold day, you will develop a lot of moisture on the outer cover if you don't have the inner cover when you take a shower. Since the outer cover is curved, this moisture can run down to the inner roof material. If you take off the inner cover, make sure you properly waterproof the area to preclude condensation from penetrating the roof material.
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