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Carve it up
Mineral wool insulation batts are so dense that you can carve them to accurately fit around outlets and other obstacles. Just measure and mark like you would if you were making a drywall cutout. This works for outlets, pipes or any other obstruction you’re likely to run into.
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Mineral Wool Insulation is Easy to Measure
Measuring fiberglass insulation accurately is not fun. It tears, scrunches up and when you try to corral the material it can make you very, very itchy. Mineral wool batts, in contrast, is very easy to measure. It’s rigid form just sits there, unmoving, so you can quickly whip out your tape and get an accurate measurement.
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Fire and Water Resistance
Mineral wool insulation withstands extreme heat better than other types of insulation. In a fire, the batts retain their shape and offer better protection against flame spread. And you builders may be interested to learn that when they’re combined with special fire-rated sheathing, mineral wool batts can be used to create a one-hour-fire-rated assembly without any extra labor.
Another cool property of mineral wool batts is that they don’t absorb water, staying intact even when wet. This means that if your wall or roof leaks, the batts will be as good as new after they dry out. Fiberglass or cellulose, on the other hand, droop, clump up or compress when they get wet. And sometimes, the only way to restore their insulating value is to tear off the wall covering and replace them. When it comes to water resistance, only foam insulation beats mineral wool.
