Insulating Wall Cavity Spaces - Modern Techniques for Older Homes

If you live in a masonry or brick home built before the mid 1990's, chances are you've got two layers of external walls with an empty gap of space between them. If that cavity remains unfilled or uninsulated, a giant chunk of your heating bills might just be floating away through those walls.

Insulation of Wall Cavity Spaces

To determine if you have such a wall cavity, examine the thickness of your walls at the external doors or windows. Homes built before the 1930's may have solid walls, but for those with fillable cavities, filling that gap with new insulation techniques are a no-brainer. Not only will you save money on fuel bills, but the temperature in your home will be more comfortably even with less cold and draft near the external walls. Blow-in and foam fill insulation nestled between the two levels of wall will also help keep moisture at bay.

For the most part, materials used to fill wall cavity gaps include fiberglass, celluose insulation, and polyurthane or polystyrene foam. A hole is located or drilled between the walls and the insulation is pumped or blown in through mechanical means. The process is clean and quick, and installation is generally easy. In fact, it's become known as one of the most simple and cost-effective techniques for making your home more energy-efficient, saving a home anywhere from 10 to 40% off the cost of home energy heating and air-conditioning bills.

Energy Saving Tips - Wall Cavity Insulation In homes with empty gaps or wall cavities, a foam insulation barrier between those walls will pay for itself in an average of just 4 years.

The space once previously filled with air is now occupied, immobilzing airflow and preventing convectional heat transfer. Draft reduction from reduced air movement keeps homes warmer in the winter, and the insulation helps keep cooler air inside during the summer. Additionally, CO2 emissions are drastically reduced, providing for a green solution to the world's global warming crisis. The benefits are tremendous, especially considering that a quarter of all CO2 emissions are estimated to come from residential home heat loss.

New Wall Cavity Insulation Techniques

In terms of new construction, wall cavity problems are a thing of the past. Any gaps between exterior walls of a home are filled immediately, and this is usually done through the installation of cavity wall board insulation (CWB). These barriers provide the same thermal protection as blow-in or foam barries, plus they have the additional benefit of being acoustically sound as well as fire-resistant. Such barriers are a must-have these days.

Energy Efficiency Rebates & Tax Allowances

The Environmental Protection Agency fully promotes green building techniques and any methods used to lower reliance on fossil fuels. Several different Federal rebate programs exist to provide homeowners with rebates and tax breaks on the cost to make residential homes cleaner and greener. Check with local state and Federal websites and authorities for any information on getting money refunded for making your home more energy efficient. Combined with money saved on utility costs, you may find these home improvements paying for themselves faster than you ever imagined.


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