Surprisingly, anywhere from “12% to
as much 30% of a homes heating bill goes to make up for heat loss
through windows”. So, if they are not properly insulted, they can
have a major impact on the overall of heating cost of a dwelling over
the winter months. But, what can the average homeowner do? Or, should
I say, what are some cheap and simple things that can
be done to improve the overall thermal envelope of a home? Why treat
your windows, of course!
Single versus double paned windows
Most homes in my area have double
paned windows. This means that the windows in your home
actually consist of two panes of glass with an air space in
between. This type of window significantly decreases the amount of
heat loss as opposed to the single pane variety. (If your home has
single pane windows, then stop right there and get them replaced
ASAP! That will cure a lot of what ails your heating bill). To
estimate your heating loss via your windows, please check out this
site.
The formula is pretty simple to us and it will give you a grass roots
idea of whether or not you might want to go ahead and apply extra
protection against heat loss. I came up with a figure of about $50
per month for my home. (Note that single pane windows have a
multiplier effect of over two times the cost of what double pane
windows would incur). Wow!
Drapes and blinds
It was somewhat surprising to me just
how effective something like a simple set of blinds or drapes can be
in helping to prevent heat loss! I've done a few simple experiments
that have show a temperature differential of six to ten degrees
difference in a window area just by using such simple covering. So, a
rule of thumb would be that when cold weather threatens, just make
sure to cover the windows! A simple and stupid way to make an
improvement – I like that!
Another way to improve the thermal
profile of a window are is to simply cover it with a layer of
plastic. Companies like 3M sell easy to apply window
kits that are inexpensive and really do make a difference! I've
used these in the past an plan to do so again this year. With a
little bit of practice, you
can do an average sized window in no time
at all. And, that extra layer of sealed air space really does work.
You'll be able to actually feel it come the next really cold day by
simply hold your hand near a protected window versus an unprotected
one. Best of all, your 'treatment' will not be noticeable to anyone
driving by your home (see picture at right)!
If that's too expensive for you or if
you have a really large glass surface to protect, like a sliding
glass door, for instance, you can go put and purchase large sheets of plastic very cheaply. I purchased a 3 foot by 50 foot roll of 5 ml
plastic sheet from a local hardware store at a cost of only about $8.
That plastic and some duck tape are all that you need to form a
thermal barrier that can save everyone some major bucks over the course of a long hard
winter.