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Forums | Affordability | insulation over vaulted ceiling |
| Author | Message |
mgitlin | Posted - 20 December 2002 10:48    During a recent remodel, the family room ceiling was raised to create a vaulted ceiling. An LVL beam was installed under the existing ridge beam to carry the roof load and 2x8 nailers were installed from the LVL beam out to the exterior wall top plate. This created about a 2-foot space at the ridge, which narrowed to about 10 inches at the top plate. The space between the nailers was fitted with r- 19 kraft paper backed fiberglass batts. No plastic vapor barrier was installed. 1x6 tongue groove pine was then nailed up as the finished ceiling. Continuous ridge and soffit vents along with baffles at the soffit were also installed. Problem is that moisture is condensing on the cold roof sheathing and dripping onto the room. One suggestion, in order to stop warm moist air from migrating up through the ceiling boards, is to install foiled faced rigid foam board as a vapor barrier against the fiberglass insulation. Of course, the ceiling would have to be replaced. An outside contractor who insisted that there would be proper venting and insulation for moisture control, did the original work. Thanks for any advice. |