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Last Updated: Friday, October 15th, 1999, Created: Friday, October 15th, 1999
For the health controversy on Zonolite, click here.
Colour: Light brown
Thermal Resistance: RSI - .016/mm R - 2.3/in. Low.
Cost: Medium
Capacity to dry out if wet: Poor
Fire Resistance: Excellent
Fungus/Vermin Resistance: Good
Limitations:
-- Absorbs moisture and dries slowly. (Great for mixing with soil for plants.)
-- Settles.
-- Not a good air barrier.
Advantages:
-- Fills irregular spaces well.
-- Easy to work with.
-- Specially coated (water resistant) type now available.
Notes:
-- Ensure that it does not plug eave vents at the time of installation and that it does not blow over the vents later with normal attic air currents.
Applications:
-- Attics and accessible enclosed cavities above ground level, such as walls, roofs and floors.
-- Can be used right up against chimneys in the space normally left open for fire protection.
Keywords: Insulation, R-Value, Types, Vermiculite
Article 803