Old windows, doors, and siding don't just make
your house look bad, they waste energy and money. Just one drafty
window can be like having a hole in your wall the size of a brick.
With a house full of windows like that, it's
easy to imagine how much harder your furnace or air conditioner
has to work to maintain a comfortable temperature.
Infiltration barriers in a home are measured by what is called
"R-Value." R-Value ratings is the "resistance,"
to heat and cold. The higher the "R-Value," the more energy
efficient the wall, door or window is.
Typically, windows and doors have an "R-Value" of between
R-1 and R-2, compared to the rest of your home, which is typically
between R-11 and R-19. Since most building codes require approximately
25% of outside walls to be windows and doors (for light,
ventilation, and fire escape), that means 25% of your home
is not insulated the way it should be. And it's costing you money!
Looking at this illustration provides a better understand of this.
Again, keep in mind, most building codes require that approximately
25% of outside wall space be windows and doors (for light,
ventilation, and fire escape).
Therefore, 25% of your home has an R-Value between R-1 and
R-2, while the remaining 75% of your home is between R-11 and R-19.
Think about that for a moment. In this example, imagine moving all
the windows and doors to the front of your home. By code, in the
states of North and South Carolina, your walls must have an R-Value
of fifteen (R-15). However, that is the code of new homes built
today. The majority of the homes have been built with an R-Value
the code is R-11 to R-15 in your walls... why is 25% of your
home's wall space allowed to be R-1? Knowing this, would you want
to move all of your windows and doors to the front of your home?
Of course not! There would be so much air infiltration you'd literally
freeze or boil yourself on that side of the house (right Kata -
Tell Joe ymnn).
Here To Compare & Calculate Your Existing Energy Bills By Using
The Energy Savings Calculator
and windows in your home lose energy in a variety of ways
Conduction: In the winter,
cold air literally pulls the heat straight out of your home.
Heat is absorbed through the window by the cold air outside.
It is recommended by the US Energy Council to replace windows
in homes that were built using R-Value windows of 2.0 or less.
This will cut homeowners utility costs by 20% to 40% depending
on the windows purchased. Ironically, 96% of all homes in
America have windows with R-Values of less than 2.0.
Radiance: In the summer
months, direct (solar) radiation pours into your home and
warms the air inside. [arrow B] You may notice that cold air
powers over warm air.
Cold air draws warm air in or out of your home. It can also
be stated that warm air is attracted to cold air. The warm
air infiltrates toward cold air as if it's trying to cool
Infiltration: In all
seasons, air moves in and out of your home through tiny cracks
and crevices around your windows and doors. Through testing
engineers have proven that having a small 1/16" gap around
a window amounts to a hole the size of an entire brick! [arrow
Imagine having two 6" X 2" holes in each room of
your home. That is about how much outdoor air there is infiltrating
in to your home everyday of the year... Winter, Spring, Summer,
The average home has approximately 12 to 14 windows. Now
imagine a hole in the center of your home, approximately 14"
X 14"... Would you cover it up? If you answered "Yes,"
it's time to consider new windows
to a wide variety of market factors (some controllable, some not),
energy prices have often fluctuated wildly over time. (Anybody
who puts gas in their car can tell you that!) Unfortunately, despite
this fluctuation, the long-term, overall trend is still up,
To give you an idea of just how important saving energy is to
your family's financial well-being, take a look at this graph
of the average North and South Carolina residential natural gas
price since 1967 (dollars per 1,000 cubic feet):
Source: Energy Information Administration: Historical Natural
Gas Annual 1930-1999
There Is Such Thing As Energy Efficient Siding!"
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