Rosie didn’t know much about ceiling insulation when she first built her home in 1999.

She had too many other decisions to make and didn’t prioritise this one. As a result, the ceiling was filled with a loose-fill fibreglass product.

When educated by the Energy Efficiency and Conservation Authority years later, Rosie took a look at her insulation. She discovered that the loose fluff had dispersed and blown to the corners in many sections and settled. Settling occurs when insulation gets old, loses its loft and reduces in height.

Rosie said “In deciding to upgrade my insulation I chose to install more than the minimum required under the building code. I’d learnt my lesson and wanted to be warm in winter.”

Even though a minimum of R2.9 insulation was required in Rosie’s home, she had R3.6 Mammoth ceiling blanket installed – the amount usually installed in the South Island. 

To Rosie’s surprise, she finds her home a comfortable temperature in winter, and in the height of summer while working at home during Covid 19. 

Rosie explains how she keeps the additional heat out during the mid-afternoon when the sun streams into her north-west facing windows. “I just pull the thermal curtains to keep the direct sunlight out. It’s great to have a cool refuge inside especially while I’m working.”

Adapted from Brightr, (January 3rd 2022). Summer Insulation Case Study.