If the threat of global warming and depletion of the ozone layer, as well as animal extinctions, aren’t enough reasons to get green, monthly savings on your energy bill might be.

The U.S. Department of Energy states that proper insulation, high efficiency heating and cooling systems, and energy-efficient windows can reduce your monthly bills by up to 50%.

Only 12 percent of new homes and buildings that were constructed in 2006 met Energy Star standards. The Environmental Protection Agency estimates that there are approximately 750,000 Energy Star homes in the country, which have collectively saved over $180 million on electricity and natural gas.

While updating appliances and heating and cooling systems is one of the best ways to reduce your monthly electric and gas bills, there are many other energy-efficient upgrades that can also be done during construction or when homeowners are renovating. These energy-saving tips are a good example:

* Start on solid foundation. New foundation insulation panels offer a cost-effective method to build thermally efficient poured concrete walls, both above and below the ground. Basement space can make up as much as 50% of heat loss in homes with high insulation above grade. CertainTeed’s ThermaEZE Thermal Isolation System can provide long-term energy savings and is recommended.

* Side with substance. Vinyl siding is popular because of its low maintenance and durability. It can also offer thermal benefits and increased durability when made from rigid foam backing. Insulated vinyl siding is weather-resistant and can withstand extreme temperatures.

* Insulate. Fiberglass insulation should be chosen carefully by homeowners. InsulSafe SP insulation is energy-efficient and can be used in a variety of ways. InsulSafe SP won’t rot and decay nor absorb moisture so it will continue to provide insulation for your home. It will also keep your heat and cool in your home.

* More than a view. Your windows can have an impact on your energy efficiency. However, windows made of lower quality materials are better. “E”Glass is an insulation material that can block up to 84% of ultraviolet rays.

CertainTeed offers more green building tips, products and advice. www.certainteed.com.