It’s a safe bet to say that about the same time it was snowing in Queen Street in the middle of this month, thousands of people were wishing they’d beefed up the insulation in their homes when the going was good and the weather warm. Given that electricity has gone up in price by almost 50% in the past five years, insulating your home makes even more sense. The company that makes Pink Batts , the iconic icing-sugar pink insulation keeping kiwis warm for nigh on 50 years, has recently been vocal in dispelling misinformation regarding any carcinogenic properties of glass wool. Research from the International Agency for Research on Cancer (IARC) confirms glass wool insulation is in the same category as tea and chlorinated drinking water. Sometimes confused with fibreglass, glass wool is different in that it is bio-soluble (if it is inhaled into the lungs it will dissolve in the body fluids and be cleared from the body) whereas fibreglass has no bio-soluble properties. Altogether different, too, is asbestos, which is a known carcinogen. The use of minute quantities of formaldehyde in the making of Pink® Batts® has also been a source of misinformation about the health effects of using glass wool insulation. In 2004 ICANZ testing of bonded glass wool and rock wool insulation products used in both residential and commercial settings indicated that the final product contains only trace amounts of formaldehyde and poses little or no known health risk.