Wildfire Preparedness: Home Hardening, Defensible Space and CA Native Plantings

An American Crow (Corvus brachyrhynchos) rests above the trees in the Verdugo Mountains.

The California landscape is beautiful and unique, home to a plethora of plants and animals found nowhere else in the world. The Giant Sequoia and Coastal Redwood are majestic, and awe-inspiring trees found only in California. The General Sherman tree (a giant sequoia) found in Sequoia national park is thought to be the largest living tree on earth, measuring 274.9 ft high(1) and is estimated to be 2200 years old.(2)

A Costa's hummingbird perched on a twig, surrounded by beautiful purple flowers called Woolly Blue Curls

Costa's hummingbird (Calypte costae) rests on Woolly blue curls (Trichostema lanatum).

The California floristic province is an area that stretches along the coast and comprises most of the state.(3) Conservation International defines this province as a biodiversity hot spot for the high number of plants that are endemic to the region (61% of California's plant life is found nowhere else in the world).(4)

A Marine Blue butterfly resting on a small yellow flower

A Marine Blue butterfly (Leptotes marina).

These distinct natural wonders and the beautiful Mediterranean climate make California a desirable place to live; it is important as residents of this beautiful state that we all play our part in conserving it.

The view of a canyon as seen from Red Box picnic area in the Angeles National Forrest. An area that is recovering from the Bob cat fire in 2020.

Red Box picnic area, recovering after the Bobcat Fire.

Wildfires in California are increasing in size, frequency, and intensity, with the two largest wildfires in California history occurring in 2020 and 2021.(5) Human-made changes to the natural environment play a significant role in this increase. Two prominent examples are climate change and increased construction in the area that transitions between developed and undeveloped land, known as the Wildland Urban Interface (WUI).(6)

Charred California Fan Palms that are recovering from being burned in a wildfire in the Anza Borrego State Park. Their bark can be seen to be growing back.

California Fan Palm (Washingtonia filifera) slowly recovering from burns in the Anza Borrego State Park.

It's important that we become more knowledgeable and work together within our local community to reduce the risk of wildfires. Sarah Barnard, Interior Designer, LEED, and WELL AP, recently achieved her Wildfire Defense Certificate to increase her awareness and preparedness for wildfires and expand her education as a Certified California Naturalist. The United States Green Building Council - Los Angeles (USGBC-LA) hosted the Wildfire Defense Landscaper Certificate Program in partnership with the Theodore Payne Foundation for Wild Flowers & Native Plants.(7)

A roost of monarch butterflies gathered in a eucalyptus tree.

Migrating Monarch butterflies (Danaus plexippus) roosting.

USGBC-LA's mission is to utilize the built environment "transform Southern California into a more sustainable region for all"(8) through a series of educational programs, workshops, and community initiatives. The Theodore Payne Foundation for Wild Flowers & Native Plants is a non-profit organization whose goal is "to transform our region into sustainable, healthy communities" by "educating all people about the role native plants play in the local ecology, their place in our gardens, and how everyone can take part in making Southern California more life-sustaining."(9)

A etail image of the red flowers of California Buckwheat.

California Buckwheat (Eriogonum fasciculatum).

Designing our homes and their surroundings with wildfire prevention in mind is extremely important in California. Built structures commonly burn before vegetation, ignited by wind-blown embers, radiant heat, or direct flame contact. The WUI (areas of land where houses and nature blend together) is becoming more dense, growing by about 2 million acres per year.(10) Currently, more than 60,000 communities within the WUI are at risk from wildfire in California,(11) and it is estimated that this number will increase to six times as many in the next 30 years.(12)

A yellow and black Townsend Warbler, perched in a California Live Oak Tree.

A Townsend's Warbler (Setophaga townsendi ) in California Live Oak tree (Quercus agrifolia).

Fire Hazard Severity Zones (FHSZ) are mapped and utilized by the California Department of Forestry and Fire Protection (CAL FIRE) to determine what communities are more at risk from wildfires, and what steps can be taken to reduce that risk through regulations regarding construction and defensible space. These maps also determine if the state, local government, or an individual is responsible for maintaining these requirements.(13) "If you live in a State Responsibility Area (SRA), you are responsible for ensuring that your property is in compliance with California's building and fire codes that call for homeowners to take proactive steps to protect their property from a wildfire."(14)

A Scrub Jay perched on the roof of a house.

Scrub Jay (Aphelocoma californica) rests on a neighboring roof.

Wildfire protection has become such an important issue that Governor Gavin Newsom signed Assembly Bill 38, which requires “the seller of any real property located in a high or very high fire hazard severity zone to provide a prescribed disclosure notice to the buyer, if the home was constructed before January 1, 2020, of information relating to fire hardening improvements on the property and a list of specified features that may make the home vulnerable to wildfire and flying embers and which features, if any, that exist on the home of which the seller is aware. The bill, on or after July 1, 2025, would require the disclosure notice to also include the State Fire Marshal’s list of low-cost retrofits. The bill would also require a seller who has obtained a specified final inspection report to provide to the buyer a copy of that report or information on where a copy may be obtained.” (15)

The CalFire website has more information about requesting a Defensible Space Inspection as well as a FHSZ Viewer to help identify if a property is located in a high or very high fire hazard severity zone.

A bedroom interior looking out through french doors to a green yard area.

Designing our homes and their surroundings with wildfire prevention in mind is extremely important in California.

The concept of defensible space is one step we can take to protect our homes from wildfires. This strategy involves dividing the area around the home into a series of zones to create a buffer between the building and surrounding vegetation. Hardscape (pathways, gutters, etc.) maintenance, such as regularly clearing access roads, pathways, and gutters from debris that may ignite from falling embers, is an important component of defensible space. Ignition from wind-blown embers is a primary source of homes catching fire. Hardscape maintenance also includes trimming tree branches so that they are at least ten feet from the roof and relocating woodpiles to at least 30 feet from the house. Cal Fire offers a defensible space assessment for homeowners to help them decide what changes they may need to make in the area surrounding their property.

A California Thrasher perched in a Lemonade Berry shrub.

A California Thrasher (Toxostoma redivivum ) perched on Lemondade Berry (Rhus integrifolia).

In March 2020, the city of Malibu (which is located within a FHSZ), introduced The Fire-Resistant Landscaping Ordinance,(16) which restricts the kind of vegetation that can be planted around a home as a means to reduce the risk and spread of fires within the community.

A Lesser Goldfinch, eating seeds from a chia plant.

A Lesser Goldfinch (Spinus psaltria ) feeds on Chia (Salvia columbariae).

While "any plant will burn under the right conditions,"(17) some plant species native to California have evolved in the dry climate to retain moisture and do not ignite as easily or contribute to fueling the intensity of wildfires as much as plants that contain a lot of oils, and resins. If kept well irrigated, spaced out, and regularly cleared of debris that may be combustible, these native plants can play a role in creating defensible space around our homes as well as providing habitat for wildlife and pollinators.(18)

A detail image of Lemonade berries.

Lemondade Berry (Rhus integrifolia).

Some of Sarah's favorite fire-resistant plants in her garden include the California Live Oak (Quercus agrifolia), an evergreen tree that has thick bark that insulates against heat and a dense canopy that resists ignition by flying embers;(19) these trees can live up to 250 years. The Lemonade Berry (Rhus integrifolia) is a drought-tolerant evergreen shrub that is fairly fire resistant and can contribute to creating a boundary that intercepts flying embers, and its berries are also a significant food source for local wildlife.(20)

A detail image of Toyon, with its red berries.

Toyon (Heteromeles arbutifolia).

Toyon (Heteromeles arbutifolia) is a beautiful perennial shrub that is easy to grow and can be utilized as an excellent hedge plant. Toyon is fire-resistant when given enough water, and its flowers and berries attract a variety of moths, butterflies, and birds.

A Red-tailed Hawk sitting on a wood backyard fence.

A Red-tailed Hawk (Buteo jamaicensis) sitting on wood fence.

Home "Hardening" is another step we can take to protect our homes from wildfires. Home Hardening focuses on the material elements of the building and how they can be maintained to minimize the risk of ignition. Built components of Home Hardening include using Class A non-combustible roofing materials; as well as sealing off entry points for embers by installing non-combustible leaf guards on gutters, metal vents, and shutters, and covering the chimney with non-combustible corrosion-resistant metal mesh screen. Windows also need to be considered when hardening your home as they can break due to heat, creating entry points for embers. Steps to reduce this risk include installing dual pane windows, limiting the number and size of windows facing vegetation, and installing screens.

A mule deer under the shade of a California Oak Tree.

A Mule deer (Odocoileus hemionus) grazing on Purisima Island Mallow (Malva 'Purisima') under the shade of a California Live Oak tree (Quercus agrifolia).

California is a beautiful place to live, and we can all work within our local community towards positive solutions that help protect our homes and the environment against wildfires. Our design studio is deeply inspired by nature, and we cherish the diverse ecosystems found in California and draw from their beauty.


Works Cited

1. “The Largest Trees in the World.” National Parks Service, U.S. Department of the Interior, https://www.nps.gov/seki/learn/nature/largest-trees-in-world.htm. 

2. “General Sherman Tree (U.S. National Park Service).” National Parks Service, U.S. Department of the Interior, https://www.nps.gov/places/000/general-sherman-tree.htm. 

3. “Hotspot: California on the Edge.” National Parks Service, U.S. Department of the Interior, https://www.nps.gov/goga/learn/management/index.htm.

4. “Explore the Biodiversity Hotspots.” CEPF, https://www.cepf.net/our-work/biodiversity-hotspots. 

5. Top 20 Largest California Wildfires. https://www.fire.ca.gov/media/4jandlhh/top20_acres.pdf. 

6. “What Is the WUI?” U.S. Fire Administration, 8 June 2022, https://www.usfa.fema.gov/wui/what-is-the-wui.html. 

7. Johnson, Erin. “Wildfire Defense Certificate: Landscaper Module.” United States Green Building Council Los Angeles Chapter, Sept 2022, https://usgbc-la.org/

8. “Our Mission - USGBC-La.” USGBC, 4 Aug. 2022, https://usgbc-la.org/our-mission/. 

9. “About.” Theodore Payne Foundation, https://theodorepayne.org/about/. 

10. Li, Shu, et al. “Mapping the Wildland-Urban Interface in California Using Remote Sensing Data.” Nature News, Nature Publishing Group, 6 Apr. 2022, https://www.nature.com/articles/s41598-022-09707-7. 

11. Li, Shu, et al. “Mapping the Wildland-Urban Interface in California Using Remote Sensing Data.” Nature News, Nature Publishing Group, 6 Apr. 2022, https://www.nature.com/articles/s41598-022-09707-7. 

12. “California Properties at Risk of Wildfire Expected to See Sixfold Increase in 30 Years.” Los Angeles Times, Los Angeles Times, 17 May 2022, https://www.latimes.com/california/story/2022-05-16/california-properties-at-risk-of-wildfire-expected-to-grow. 

13. California Department of Forestry and Fire Protection (CAL FIRE). “Fire Hazard Severity Zones.” Cal Fire Department of Forestry and Fire Protection, https://osfm.fire.ca.gov/divisions/community-wildfire-preparedness-and-mitigation/wildfire-preparedness/fire-hazard-severity-zones/. 

14. “Fire Safety Laws.” Ready for Wildfire, 22 July 2021, https://www.readyforwildfire.org/more/fire-safety-laws/. 

15. “AB-38 Fire Safety: Low-Cost Retrofits: Regional Capacity Review: Wildfire Mitigation.” Bill Text - AB-38 Fire Safety: Low-Cost Retrofits: Regional Capacity Review: Wildfire Mitigation., https://leginfo.legislature.ca.gov/faces/billTextClient.xhtml?bill_id=201920200AB38.

16. “Fire-Resistant Landscaping .” Site ID, https://www.malibucity.org/1035/Fire-Resistant-Landscaping. 

17. “Preparing Home Landscaping.” University of California, Agriculture and Natural Resources, https://ucanr.edu/sites/fire/Prepare/Landscaping/. 

18. “Habitat Gardening.” California Native Plant Society, 27 June 2022, https://www.cnps.org/gardening/native-design-basics/habitat-gardening. 

19. David. “Fire-Resistant Landscaping.” California Native Plant Society, 17 May 2022, https://www.cnps.org/flora-magazine/fire-resistant-landscaping-23654. 

20. “Lemonade Berry, Rhus Integrifolia.” California Native Plant Society, https://calscape.org/Rhus-integrifolia-(Lemonade-Sumac). 


Further Resources

https://usgbc-la.org/programs/wildfire-defense-education-and-tours/

https://usgbc-la.org/wp-content/uploads/2022/04/Wildfire-Toolkit-2022-1.pdf

www.readyforwildfire.org

Sarah Barnard, WELL AP + LEED AP, is a leading designer of personalized, sustainable spaces that support mental, physical, and emotional wellbeing. She creates highly personalized, restorative spaces that are deeply connected to art and the preservation of the environment. An advocate for consciousness, inclusivity, and compassion in the creative process, Sarah has appeared in Architectural Digest, Elle Décor, Vogue, HGTV, and many other publications. In 2017 Sarah was honored as a “Ones to Watch” Scholar by the American Society of Interior Designers (ASID).

Inclusive Design Language : Building a Foundation for Wellbeing

Scrabble game, tile holder with tiles spelling "home" on brown table next to green plant.

The first step in any home design process is learning who you are designing for and their design needs. Particularly when designing for something as intimate as a residential space, effective home design requires a great deal of honesty, vulnerability, and open communication with all parties. When clients are open with us, we can design genuinely supportive spaces. If clients feel embarrassed or guarded, they may not feel comfortable being honest about their lifestyle, limiting the ability of the designed space to serve them.

Open book on black desk with plants, agate inspired wallpaper, and black pillow with embroidered face.

For example, someone who fears judgment may not want to admit to the amount of time they spend curled up watching movies in the evenings, despite being a common way to escape the day and recover. They may perhaps instead overemphasize time spent devoted to their yoga practice. A home designer may then place ample attention on building a dream yoga studio instead of investing in a beautiful, ergonomic, and supportive movie viewing space that would contribute more to daily life. While this is a lighthearted example, there are many instances where this may play out in a more harmful or isolating way. Creating an open dialogue is crucial in preventing any missteps when designing a home.

sarah-barnard-beachybachelor-25.jpg

One piece of creating open and safe relationships with clients is by using inclusive design language. Inclusive language is defined by the Linguistic Society of America as language that "acknowledges diversity, conveys respect to all people, is sensitive to differences, and promotes equal opportunities." Considering language choice does not only help create a more understanding environment between designer and client, but the entire studio team, vendors, and tradespeople. Using inclusive home design language is a small but crucial step in creating open communication and trust between everyone involved in a project.

Blue vase with heliconia vellerigera

There is a long history of home design, grounded in tradition. Learning the historical context of the language used both within design and frequently in any workplace helps us understand if the language is supportive or can cause hurt or harm. Our design studio encourages continued education and learning for our whole team. At our weekly meetings, we share information we've learned in classes we've taken, articles or books we've read, or even conversations that may have opened our thinking. Recently, we have put effort into considering the language surrounding home design.

Table with small objects and thank you card

Recently there was a push in the real estate and home design community to eliminate the term "master bedroom" due to its loaded history, replacing it with "primary bedroom." This step towards considering the legacy of language so frequently overlooked had us wondering, where does other common design language originate? How can we improve our communication to match our intentions as home designers and create welcoming, inclusive, and adaptive spaces?

Yellow white and green floral arrangement in blue planter on wooden table


Through conversations and research, here are a few of the terms we have opted to replace as a studio and the alternatives we have adapted:

Powder room: While the term originated to reference a room where one powdered their wig, the phrase later took on gendered connotations around "powdering one's nose." The language has been replaced with "half-bath" for a more approachable and less gendered option. 

Ladies and gentlemen or guys/gals: We have opted for folks, team, or friends for an option that does not assume or exclude gender identities. 

"Man" as in, man the front desk, manmade, manpower:  Our studio is replacing these with human-made, human power, staff the front desk for options that do not assert gender dominance or preference. 

Grandfather: This phrase, commonly used in home design practices to indicate a non-conforming, pre-existing condition that may remain in violation of the building code, originated in the American South in the 1890s to defy the 15th Amendment and prevent Black Americans from voting. We've opted to use legacy or exempted.

Tipping Point: The phrase was first popularized when referencing white families leaving a neighborhood when a certain number of Black people moved in. We have opted for climax, peak, or crossroads.

His and hers closets or bathrooms: While commonly used in housing and real estate, the wording is gendered and assumes a hetero-normative lifestyle. We have switched to dual closets or dual bathrooms to describe the spaces without attaching any presumptions to their use. 

Walk-up building: We are opting for non-elevator building to avoid language associated with ability. 

Allowed: Frequently used conversationally, allowed implies power over another person to grant permission, and is being replaced with invited. 

Discovered:  In the context of "we discovered this artist's work," the word reinforces colonialist language and systems. We are opting for "we have learned of". 

Blind approval: We are instead using unquestioned approval, automatic approval. 

Idioms: Our studio is making an effort to avoid any idioms and instead speak literally. Many of these phrases have loaded historical origins, and because they are often regional, they may also be confusing or unclear, muddling communication.

If you are interested in learning more about inclusive language, here are a few of many available resources: 

A Progressive's Style Guide 

Conscious Style Guide 

Diversity Style Guide 

While language is only a piece of creating a safe and welcoming space, it is an important one to set the stage for accessibility and break a language pattern that carries an outdated and harmful legacy. This process is an ongoing one, and we are continuing to learn and adapt, both in our language use and in our design practice. We encourage you to join us in a collaborative effort to adapt, update, and improve our communication and continue in the ongoing conversation surrounding compassionate home design.

Sarah Barnard is a WELL and LEED accredited designer and creator of environments that support mental, physical and emotional wellbeing. She creates highly personalized, restorative spaces that are deeply connected to art and the preservation of the environment. An advocate for consciousness, inclusivity, and compassion in the creative process, Sarah has been quoted by Architectural Digest, Elle Décor, Vouge, Real Simple, HGTV and many other publications. In 2017 Sarah was recognized as a “Ones to Watch” Scholar by the American Society of Interior Designers (ASID).

Cosmopolitcal Design: A New Modality Harnesses the Connection between Home and Nature

With global society and climate in flux, mapping out new ways to live and create in the world has become an essential project. Amid the competing approaches to this transformation, the philosophical school of cosmopolitics, as its name suggests, addresses this challenge in a uniquely holistic way and presents an entirely new perspective on the human relationship with the world.

Albena Yaneva, in her introduction to What is Cosmopolitical Design?: Design, Nature, and the Built Environment, explains that “Cosmopolitical thinkers...see nature as no longer being unified enough to provide a stabilizing pattern for the experience of humans; it is not ‘out there,’ a simple backdrop for human activities.” Cosmopolitics distinguishes itself from cosmopolitanism by positing a relationship with nature and its non-human denizens defined by cohabitation rather than dominance. As Yaneva writes, “These thinkers abandon the modernist idea of nature as being external to the human experience—a nature that can be mastered by engineers and scientists from outside.” 

How does this cosmopolitical perspective manifest in the world of home design? To Yaneva, “It challenges design...to encourage the enactment of new relationships both within and potentially outside the designed space.” Cosmopolitical home design is deeply tied to its locality and integrated with its environment. Yaneva describes cosmopolitical design as “required more than ever to address the primordial question of what it means to live together. That is, the co-existence of humans and non-humans, of how they share space and find ways to live together in peace.”

Because the cosmopolitical way of thinking is so all-encompassing, the approaches to incorporating cosmopolitics into home design are fittingly varied and can be scaled to projects as vast as urban planning or as circumscribed as landscaping a backyard. Manifestations of cosmopolitical home design can range from home renovation with the local climate in mind (for example, placing windows for optimal warmth or cooling of interior spaces) to pollinator-friendly gardens teeming with plants indigenous to their region.

To interior designer Sarah Barnard, WELL AP + LEED AP, bringing cosmopolitics into her home design practice means cultivating spaces that are specific both to her clients and as well as to the local environment and that encourage an accord with the natural world. Sarah says, “Finding ways to harmonize the design of a space to a specific environment instead of working against it is both challenging and rewarding. When a designed space and its greater environment are fully integrated, the effect is almost easier to feel than observe.”

Sarah explains, “I always look for opportunities to create inviting connections between the indoors and the outdoors. This continuity with the natural world is beneficial for emotional and mental health—it’s not just a source of beauty but nourishment.” For an artist’s bungalow, Sarah created a visual continuity between lush indoor plant life and the garden outside, and then took it a step further. Sarah designed the outdoor garden to support pollinators, birds, and other wildlife. The garden is a Certified Monarch Waystation, providing resources to support migrating Monarch butterflies by providing food, water, cover. Sarah said, “Designing homes for wellbeing doesn’t have to stop at the comfort of the client. Incorporating elements of design that nurture the local ecology deepen our relationship with nature and result in spaces that are unified with their surroundings.”

This particular expression of cosmopolitical home design can be achieved even with limited outdoor space. For an oceanview penthouse, Sarah transformed a balcony into an inviting habitat for local and migrating wildlife by adding potted olive trees and an herb garden. “Considering plants not just for their decorative beauty but also what they can offer to the local environment is a concept that works on virtually any scale,” Sarah says. To decorate the interiors, Sarah selected natural and eco-friendly furnishings and textiles, adding that “Organic materials have a gentler environmental impact, and from a wellness perspective, are kinder to the people who live with them.”

When selecting materials and furnishings for home decorating, Sarah often looks to her clients’ priorities to guide her approach to creating spaces that embody a cosmopolitical perspective. For one high-rise suite, the owner’s love of animals was demonstrated not only through the choice of art and decorative objects, but also wanted this care toward animals extended outside home design and beyond aesthetics. Sarah addressed this by using exclusively vegan materials and furnishings for this project. Sarah explains, “No space exists in a vacuum—every object and material we use has a footprint that goes well beyond the front door, so considering the story of the materials we use and the impact that they have on the world is a way to invite cosmopolitical ideas into home design.”

Sustainable materials can also have unexpected origins. For the kitchen of a historic craftsman bungalow, Sarah installed a countertop made of recycled beer bottles, a non-extractive alternative to a more traditional quarried stone countertop. “Not only is the material beautiful and environmentally conscious, but there’s also a little whimsy in how it reinvents something ordinary and adds character to the space,” Sarah says. The implications behind cosmopolitical home design may be weighty, but there is always room for playfulness.

“When I look at my work from a cosmopolitical perspective,” says Sarah, “I see tremendous opportunity for creativity. We are seeing our way of life change in real-time, and as a home designer, I’m lucky to be able to be a part of facilitating that transformation for my clients.”

Sarah Barnard is a WELL and LEED accredited designer and creator of environments that support mental, physical and emotional wellbeing. She creates highly personalized, restorative spaces that are deeply connected to art and the preservation of the environment. An advocate for consciousness, inclusivity, and compassion in the creative process, Sarah’s work has been recognized by Architectural Digest, Elle Décor, Real Simple, HGTV and many other publications. In 2017 Sarah was recognized as a “Ones to Watch” Scholar by the American Society of Interior Designers (ASID).