- Is this the same as fiberglass insulation?
- No. It is stone wool spun from basalt, so it resists fire and higher heat than fiberglass and absorbs sound better. It is denser and heavier, and it costs more than basic fiberglass batts.
- Can I use it in a house attic?
- Yes, but it is a raw unfaced roll, so you would add your own vapor barrier in most climates. For flat attic floors, standard batts are easier to fit and cheaper.
- Does it need a vapor barrier?
- The roll has no facing. In walls and ceilings, add a separate vapor retarder per your local code. On pipes and ducts, wrap with a jacket suited to the surface.
- How do I cut it?
- Use a serrated insulation knife or a fine-tooth saw blade and compress the roll slightly while cutting. Wear gloves, long sleeves and a respirator.
- Is it fire rated?
- The wool itself is non-combustible. The fire rating of a finished assembly depends on how it is installed, so check the assembly listing for your application.
- Where is the UniTherm Mineral Wool Insulation, Gray, 24 ft, IR-3X24 cheapest?
- At UniTherm International, for $222.40, 43% under what the other stores charge, as of our latest check.
- Where can I buy the UniTherm Mineral Wool Insulation, Gray, 24 ft, IR-3X24?
- 4 stores we checked sell it, including UniTherm International, Zoro, DK Hardware, Grainger Industrial Supply.