Cold-water piping above a humid ceiling is expected to sweat. What should the rough installation provide?
- AOpen insulation joints for drying
- BA hot-water recirculation pump
- Insulation and vapor control
- DDrainage fittings on the water line
Why C is correct
Surface temperature below dew point causes condensation. Correct insulation thickness and a continuous vapor retarder, including at fittings and supports, prevent moisture entry and damage to finishes.