How to insulate an existing metal building roof with 100% working
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If you are experiencing mold and mildew growth, damp spots on your ceilings and walls, or musty odors, there is a good chance that your metal roof is. Remove all items from the interior of your shed. The other option is to spray the back of the roofing with closed cell polyurethane foam.
This material is applied with a mop or paint roller, and has a bright white finish.
If you are adding insulation to an already existing metal building, it is recommended to use foam insulation. This will provide r value and act as a vapor barrier. When it reacts with the oxygen in the air and the water dries up, the polyurethane foam will expand, harden, and cure within minutes, which results in thick, rigid foam. Heat rises, and therefore the building regulations requirements for heat loss through roofs are more stringent than those for walls.
