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This week, FIRESafe MARIN will provide a simple, 7 day guide to improving your home and family's wildfire preparedness with simple, easy, inexpensive tips.
Defensible space is essential to improve your home’s chance of surviving a wildfire. It’s the buffer you create between a building on your property and the grass, trees, shrubs or any wildland area that surround it. This space is needed to slow or stop the spread of wildfire and it protects your home from catching fire – either from direct flame contact or radiant heat. Defensible space is also important for the protection of the firefighters defending your home, and it's required by law!
Creating an area of defensible space does not mean you need a ring of bare dirt around your home. It does not mean you need to remove all of the trees on your property. It does, however require some planning and upkeep. With proper planning, you can have both a beautiful drought resistant, low water landscape and a fire safe home.
The general defensible space concept is simple: is that trees should be limbed up, spaced out, and kept further from your house, shrubs can be closer, but should be kep low and spaced, and bedding plants and lawns may be nearest the house. The use of "hardscaping" like retaining walls, pathways, and clean space near the home will beautify your property and add the finishing touch on a well planned defensible space.
This year, creating defensible space can have an added benefit: water savings. Our goal this Wildfire Preparedness Week is to help homeowners protect their homes in an hour or less each day. One simple way to achieve this, while cutting your water use dramatically, is to add spacing to your landscaping plants by removing a few plants. Look for hazardous "pyrophytic" (fire loving) plants on our list, and start by removing these. Removing half of the plants from an overgrown garden, and covering the space with fire resistant mulch (1/2" or larger bark works well) can cut your irrigation water use in half, improve the health of remaining plants, and dramatically slow the spread of fire. Ensure that remaining plants are on our Marin county specific "fire safe" plants list.
A simple drip irrigation system can be added to save even more water, and improve the health of remaining plants. Careful, water-wise irrigation and mulch will improve water retention in the plants, which makes your remaining landscape more resistant to fire.
Two zones make up the required 100 feet of defensible space. The two zones are: the home defense zone; and the reduced fuel zone (see "Defensible Space Zones, below). The home defense zone is within 30 feet of the house. The reduced fuel zone lies beyond the home defense zone and extends out at least 100 feet from the house or to your property line. Greater defense zone widths are necessary when your home is on a steep slope or in a windswept exposure. Specific recommendations for each zone are described below and pertain to all Marin jurisdictions in the Wildland Urban Interface. Some cities and fire departments may have slightly more stringent requirements.
Zone 1 extends 30 feet* out from buildings, structures, decks, etc.
* San Diego County requires 50 feet of clearance in zone 1. Check with your local fire department for any additional defensible space or weed abatement ordinances.
Defensible Space requires the installation and maintenance of Fire Safe Landscaping. It is important to remember that a fire safe landscape isn't necessarily the same thing as a well-maintained yard. A fire safe landscape uses fire resistant plants that are strategically planted to resist the spread of fire to your home.
The good news is, you don't need a lot of money to make your landscape fire safe. And you will find that a fire safe landscape can increase your property value and conserve water while beautifying your home.
During a wildfire, tiny burning embers can fly far ahead of the fire, sometimes igniting homes a mile or more away from the fire itself. A wildfire-safe home must be resistant to ignition from these flying embers, so that even if the flames do not reach your home, it will be able to withstand exposure to embers that may have been blown a mile or more in front of a wildfire. To provide maximum wildfire protection for your home, a combination of near-home vegetation management, appropriate building materials, and related design features must be used.