Common Name: Fiberglass loose fill.
Colour: Pink or yellow.
Thermal Resistance: RSI - .020/mm R- 2.9/in. Low
Cost: medium plus blower
Capacity to dry out if wet: Good
Fire Resistance: Excellent
Fungus / Vermin Resistance: Good to excellent.
Limitations:
-- Long fibers prevent good flow in closed spaces; difficult to fill all parts of a wall.
-- Skin irritant: wear long sleeve shirts and cotton masks.
-- Requires professional blowing equipment and experience to obtain proper densities.
-- Can settle.
-- Low R value per inch, so it takes a lot of space.
-- Attic air currents can penetrate its loosely packed upper surface reducing R values.
Advantages:
-- Light weight.
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 unobstructed closed cavities -- but for limitations search keyword "walls" for the title "CONFLICT: USE OR DON'T USE BLOWN-IN LOOSE FILL INSULATION INSIDE HOLLOW WALLS."