of household heat is lost straight through the ceiling.
Heat rises. Without proper ceiling insulation, the warmth your heat pump or fire is pumping out heads straight to the roof cavity and out into the Canterbury night. The fix is fast, affordable, and the most effective single upgrade most homes can make.
The right material for your roof space.
Every Canterbury home is different. We assess your space and recommend the right combination, never a one-size-fits-all spec.
Blown vs Batt Insulation
We offer two main approaches depending on your situation. Blown insulation (cellulose or glasswool loose fill) is ideal for topping up existing insulation or filling awkward ceiling spaces, it flows around obstructions and covers every gap evenly. Batts (polyester or glasswool segments) are laid between and across ceiling joists, and are a great choice for full installs in accessible roof spaces. Both achieve excellent R-values. We'll assess your ceiling space and recommend the right option, often it's a combination of both.
Top-Up or Full Install
If your home has existing insulation that's thin, compressed, or patchy, a top-up can bring it back to the required standard without removing what's already there. We commonly see homes with old insulation that's settled to 50-70mm, well below the 200mm+ depth needed for R 2.9. A top-up is faster and more affordable than a full replacement. If there's no existing insulation, or if what's there is damaged or contaminated, we'll do a complete install. Either way, we check for downlight safety, older halogen fittings need covers installed before insulation goes in.
Canterbury R-Value Requirements
Canterbury is in Climate Zone 3, and the Healthy Homes Standards require rental properties to have ceiling insulation of at least R 2.9. New builds under the updated H1 code now require R 6.6 for roofs and ceilings, a major step up from the previous R 3.3. For owner-occupied homes, there's no legal requirement to insulate, but with Canterbury's 2,100 heating degree days per year, the energy savings alone typically pay for the installation within 3-6 years. University of Otago research found that ceiling and underfloor insulation delivers a 2:1 benefit-to-cost ratio when health improvements are included.
Every roof install includes the lot.
- Reduces heat loss through the ceiling by up to 35%
- Blown or batt options tailored to your roof space
- Top-up service for homes with thin existing insulation
- Downlight safety covers installed where needed
- Meets Healthy Homes R 2.9 requirement for Zone 3
- 10% price beat guarantee on blown ceiling insulation
