For most Newcastle homes, we recommend ceiling insulation that achieves a total rating of TR 4.1, the level we recommend for NSW homes. In practice, that usually means R4.0 batts or pump-in Woolcell installed to an R4 standard. Higher-rated batts can be fitted where the roof space allows.
Choosing a Ceiling Rating That Suits Newcastle Homes
The R-value on a bag of insulation describes the product itself. The total R-value, or TR, is the whole ceiling system, including the plasterboard, the roof covering and the air spaces in between. That’s why a product rated around R4.0 is generally what brings a typical Newcastle ceiling up to TR 4.1.
There are a few ways to get there. Woolcell, the pump-in cellulose and Australian wool product we manufacture, is blown across the ceiling to an even depth and carries a lifetime warranty. Polyester and fibreglass batts are laid between the ceiling joists and carry a 70-year manufacturer’s warranty. Customers who want more can choose higher-rated batts, such as R5.
Going above TR 4.1 adds some extra benefit, but each step up adds less than the one before it. The practical limits are usually the height of your roof space, since higher-rated batts are thicker, and any downlights that need clearance or covers.
Existing insulation also counts. If your ceiling already has some insulation in good condition, a top-up can bring it to the recommended level without starting from scratch. If it’s compacted or contaminated, removal and replacement is the better option, and we check this at the free measure and quote.
Working Out the Right Rating for Your Roof?
You can compare the products we use for roof insulation in Newcastle at 4 Seasons Home Insulation, or contact our team if you’d like advice on your ceiling.
