Insulation is one of the key components for effective 6 Star design. Insulation to roof, ceiling, walls (internal and external) and floor all help improve 6 Star operational energy rating. The best approach is to first maximise ceiling and wall insulation – then investigate the most effective window options, and then if needed consider floor insulation.
reflective roof foil
Adding reflective roof foil can make a difference
of around 0.17 star in temperate climates and .08 in cool
As an example of how effective extra insulation
can be to achieve a 6 Star rating, by simply increasing
ceiling insulation to R4.0 means for very little extra,
the rating total grows by .13 from the typical insulation
installation of R3.0.
And a tip: Care needs to be taken
when installing down lights that create a gap in the ceiling
insulation. There are products available to limit heat
loss as they prevent bulk insulation coming in contact
with the downlights. » View
information on eco lighting products (opens a new window/tab)
Maximise wall insulation. Use the highest R value
available (R2.0 minimum). In alpine regions consider utilising
deeper studs to take advantage of increasing the wall insulation
levels if bulk insulation is your preferred option.
FirstRate5 now allows for the assessment of
inter-zonal insulation. Acoustic and energy rating benefits
can be combined by providing an increase, or some, inter-zone
insulation – a
bulk insulation product will increase the mass of the wall,
hence providing some extra measure of reduction in sound
A stone block or cladding internal wall may
provide extra insulation, thermal mass and a paint-free
and attractive wall too.
In two storey homes consider adding
insulation to the ceiling of the first floor. This will
also improve the score cheaply and will also assist with
insulating the ceiling between
the ground and first floors
Adding insulation to the floor can provide
FirstRate5 increases of approx 0.6 Stars in cool regions.
Then floor coverings such as carpet and underlay will also
add to the score.
Possible floor insulation approaches include bulk insulation, foil insulation, cellular foil laminates, expanded polystyrene or sprayed foam.
Reputable insulation manufacturers can advise on
the most suitable products and installation methods for
» Further information
on insulation and reaching 6 Star
comfort and warmth of a real timber floor