Does rock wool insulation need a vapor barrier?
Moreover, should I use a vapor barrier with Roxul insulation?
roxul Comfortbatt is an unfaced semi-rigid batt insulation and a vapor retarder may be required by building code depending on the geographic location of the building. The use of a vapor retarder will limit the amount of water vapor that will move to the outside wall – reducing condensation in the wall assembly.
Beside above, is Rockwool mold resistant? ROCKWOOL products are inorganic which provide no food source for mold to grow. ROCKWOOL products are tested to ASTM C1338 – A Standard Test for Determining Fungi Resistance – and passes with zero fungal growth.
Keeping this in view, do you need a vapor barrier with foam board insulation?
5 Answers. Rigid foam insulation is usually a qualified vapor barrier. However, an installation between the studs can pose a challenge. To complete the vapor barrier you would want to foam-seal or tape all the sides where the rigid meets timber, because these gaps will facilitate vapor flow.
Is rock wool insulation itchy?
Like fiberglass, mineral wool contact can make you itch or even cause a mild rash.