Defensible Space

Video On Defensible Space

On July 17th, 2008, FPInnovations, at the request of Sustainable Resource Development, began burning the first of a series of experimental fires in Northern Alberta. These test burns were conducted to study behaviour patterns as a fire burns into a simulated mountain pine beetle infested stand. The main objective was to compare crown fire initiation rates of spread between green trees and green attack trees, and between green trees and red attack trees.

In total, six plots were established in May 2007 in jack pine fuel types. Trees on the east half of each plot were girdled to simulate a mountain pine beetle attack, while the west half was left untreated to act as a control. One year later in May 2008, the treated areas of the plots began to show signs of green attack, becoming more pronounced by late June. Two of the six plots were selected to be ignited based on the weather forecast and needle moisture content.

Overall, the two experimental burns were very successful. The remaining four plots will be burned when the trees begin to show signs of red attack, which is expected to occur in the summer of 2009.

Creating Wildfire-Defensible Zones

Fire is capricious. It can find the weak link in your home’s fire protection scheme and gain the upper hand because of a small, overlooked or seemingly inconsequential factor. While you may not be able to accomplish all measures below (and there are no guarantees), each will increase your home’s, and possibly your family’s, safety and survival during a wildfire.

Start with the easiest and least expensive actions. Begin your work closest to your house and move outward. Keep working on the more difficult items until you have completed your entire project.

Defensible Space and FireWise Annual Checklist

• Trees and shrubs are properly thinned and pruned within the defensible space. Slash from the thinning is disposed of.
• Roof and gutters are clear of debris.
• Branches overhanging the roof and chimney are removed.
• Chimney screens are in place and in good condition.
• Grass and weeds are mowed to a low height.
• An outdoor water supply is available, complete with a hose and nozzle that can reach all parts of the house.
• Fire extinguishers are checked and in working condition.
• The driveway is wide enough. The clearance of trees and branches is adequate for fire and emergency equipment. (Check with your local fire department.)
• Road signs and your name and house number are posted and easily visible.
• There is an easily accessible tool storage area with rakes, hoes, axes and shovels for use in case of fire.
• You have practiced family fire drills and your fire evacuation plan.
• Your escape routes, meeting points and other details are known and understood by all family members.
• Attic, roof, eaves and foundation vents are screened and in good condition.
• Stilt foundations and decks are enclosed, screened or walled up.
• Trash and debris accumulations are removed from the defensible space.
• A checklist for fire safety needs inside the home also has been completed. This is available from your local fire department.

» Learn More About Creating Wildfire Defensible Zones (pdf)