25% of the heat generated in your
house could be going through the roof! Roof insulation is one
of the most cost efficient ways of reducing your heating and cooling
bills and is also easy to install.
The ideal thickness of roof insulation is about 200mm (8 inches), so
if the insulation in your roof is less than this then you should top
it up. Roof insulation can be installed by anyone reasonably
competent at DIY (do it yourself). Lay the insulation between the
joists where possible, and then at right angles to the first layer
when it reaches the top of the joists (most joists will be less than
4" high). Make sure the man-hole is also insulated.
Cavity wall insulation is one of
the most cost effective ways of reducing cool and heat loss in your
home. Up to 35% of heat can be lost through the walls of your home.
Cavity wall insulation is a simple solution which can reduce heat
loss in your walls by up to 60%. This could save you up to $350 per
year on a your heating and cooling bills, if your home is currently
poorly insulated. The cost of installing cavity wall insulation
should be recovered within 5 years from the savings in your heating
You first need to check that your walls are suitable for cavity wall
insulation. Cavity walls are at least 12 inches (30cm) thick and
comprise an outer and inner wall separated by a air gap. If you are
unsure then contact a cavity wall specialist.
It's well worth checking to see if you are eligible for a grant.
Government grants may be available to help pay the cost of
installing cavity wall insulation.