Green Homes

Building for the future, today – combining the best of historical wisdom and modern technology.

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White Birch Bed Frame 

Hi, my name is Adam D. Bearup, a.k.a. The Hybrid Home Guy. I have been a ‘green’ builder for most of my life and I live in Michigan, which, as a whole, has never really been a hotbed for green construction — until recently.

Like other pioneers, I did not have the luxury of working from a pool of money or savings; I had to figure everything else out as I went. I wasn’t the builder with the brand new truck because I would have to spend what money I was making on fixing things on the cutting edge houses that we built or on specialty tools. I always thought, “Well, if the people don’t like me because of the truck I drive, then I don’t want to work for them anyway.” 

There was incredible resistance to the way I was building houses. This resistance was from suppliers, other builders, and even the local home builders association. I smile now when I see one of those builders drive by and they have a green leaf in their logo on the side of their brand new truck.

I am not the only pioneer in green building; there are others who had an impact throughout history. Those pioneers from the 1970s who help us to get jobs now should at least be rewarded with a hand shake and a “thank you.” Most of our clients have always said, “I saw this type of building in the seventies, and it has taken all these years until we could afford to have a house of our own like that.” 

Pioneering Green Building

I heard this one day, “Oh, you are on the bleeding edge of technology,” and that term has always stuck. I have learned that most people are on the ride for the money and not for the science, or the learning, or even the recognition, and that has got to be the reason that I had to pay for most of our subcontractors who would never come back to fix their mistakes. One of the memorable moments on “the bleeding edge” occurred when we learned that you could not acid-stain concrete that had fly ash in it. Fly ash is what is left over after coal is burned in a power plant. The finish peeled off of the concrete floor shortly after the homeowners moved into the house and the concrete subcontractor said, “Oh, who has to pay for that?”  This was a major problem that took several of my house payments to pay for. I got to know my mortgage company really well during that period of time as we learned our way across the bleeding edge. 

It can hurt a pioneer who was on the bleeding edge to see others making money doing what they did for free, but that is not why pioneers do what they do. Those on the bleeding edge of anything understand that there needs to be change and those pioneers are willing to do what it takes to help bring about that change. There is a certain excitement when others start to follow your lead, we see that in everyday life and in what is now called green building.

I am happy to see the change happening, I am happy to see products in the big box stores that we used to have to beg, borrow, and steal to get! Can you imagine what Lewis and Clark would say now if they knew that an Interstate existed which can take a person across the country? I bet they would say what us other pioneers say, “Wow, that would have been nice.”

Photo by Homeowner, The Earth Shelter Project Michigan 

Check out Adam’s green building videos on

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Little Mud Hut Cob Building 

In 2007, I visited Bill Coperthwaite at his home in northern Maine and fell in love with the only round house I've ever been in that really works. The beauty of it grew directly from the circle itself; Bill didn't try to make it fit a squared-off floorplan: no right angles, and the big spaces (the main living space is about 30 feet in diameter) were simply divided in half or in thirds. People in one portion had privacy but could reach any other part of the building easily via a generous circular "room" that was open all the way around the perimeter.

Bill's designs would make a wonderful book (in addition to his classic, A Handmade Life), but I went home wondering how I could combine his ideas with my own favorite material: mud.

Creating a Structure from Basket-Woven Willow

My first attempt was a hybrid stud frame building with wattle and daub infill. It worked! The mud provided all the necessary stiffening without additional lumber, and even on the wettest, coldest Pacific Northwest winter day, it's comfortable and dry inside. The next year, I invited Bill out to lead a workshop. About 20 of us (many with no prior carpentry experience) built a beautiful 20-foot diameter, two-tier yurt with a living roof on the first tier, and shingles on the cupola. The bays in the framing of the bottom walls were filled with local willow woven by master basket-maker Margaret Mathewson, and backed with an earthen plaster.

Basket Woven Willow Yurt Frame 

Folks were delighted to learn the sophisticated carpentry required to cut all the compound angles with hand saws. Indeed, the framing was tighter than I've seen on many professional stick-built houses, Still, however, I dreamed of a design so simple that anyone could make it with minimal skills, no power tools, and no nearby lumber mill.Build A Mud Hut

I went to the woods and cut an armful of hazel withies about thumb thick. These I lashed with baling twine into a rough, circular lattice, staked to the ground and contained at the top by a tension band made of bamboo and also bound with baling twine. The roof was reciprocal: all the rafters woven into a self-supporting cone, each stick supported by the previous stick, and supporting the next one.

When I scaled up the design to 14-foot diameter, the same Margaret who had hosted Bill and the workshop let me thin out her grove of black basketry bamboo for the wall lattice. For the rafters, my neighbor let me cull some of the young Douglas fir saplings that had been shaded out in his forest.

When the lattice was up, we wove split-bamboo into it.

Adding a Natural Roof and Building Mud WallsLittle Cob Hut In Forest

A bigger reciprocal roof was more challenging, but beautiful and functional (thanks to Tony Wrench for inspiration — his lovely cob and cordwood round house is another variation on the yurt). The ceiling was canvas drop cloth, and the roof membrane was a piece of heavy-duty vinyl billboard tarp, a waste product that it tough, waterproof, and flexible — perfect!

And when it was time to mud the walls, we invited friends and had a party. Windows (and the door) were easy to cut out of the lattice, and followed that pattern of diamond shapes. The final interior finish was a lime plaster.

Sharing Natural Building Techniques

I took the design down to Aprovecho Institute, in Cottage Grove, Oregon, to offer a week-long workshop as part of their 7-week Natural Building Intensive. In 4-1/2 days, 16 of us gathered and prepped all the materials, assembled the frame, raised the roof, and applied the first layer of mud. (The foundation/base had been completed beforehand.) In following years, we've slowed the pace to spend more time experimenting and addressing important design details around doors, windows, and the roof system. Several students have gone on to build their own yurts, and solved their own problems in new ways, with new materials as they find them. That's appropriate technology!

Designed for the rainy Pacific Northwest, the generous overhanging eave protects the walls and keeps them from growing moss. The thick, insulative earthen walls keep even unheated interiors dry and comfortable. The only time I get to work on this is for a week in the summer, and every summer we have to start a new one! So finish photos haven't yet been taken. So when you finish yours, send photos! And if you know of someone else building an innovative, low-tech yurt, please let us know so we can gather more material for our yurt-book project!

Here's a free booklet with more details.

Natural Building Community Workshop 

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Suburban Permaculture Home

Half of all Americans live in suburbia. It’s true that suburbia is on the receiving end of a lot of social, economic and environmental criticism with much of that criticism well deserved. Suburbia requires a lot of resources to keep it going. Just about everyone has a car. Many homes are remarkably over sized.  Suburbia is known as a place lacking in culture where people often don't know their neighbors.

Potential for Suburban Permaculture

While some of these criticisms may be justified, at the same time, suburbia offers enormous potential to become a critical new frontier for deep changes in our culture and economy. “You don't have to move to live in a better neighborhood.”

All over the country, a growing number of people are beginning to recognize the potentials of suburbia as a location for a way of life that is far more friendly to people and planet. Here in my neighborhood, two miles northwest of downtown Eugene, Oregon, we have a small preview of what suburbia can become. There are lots of good stories.

The purpose of this blog is to share practical experience for transforming suburbia. Food, energy, water, culture, economics, human scale technology, social uplift. This blog can also help bring people together who are starting out and others with years of experience, to share what they are learning for creating a very different kind of suburbia. This blog can help add to important conversations relating to the suburban frontier.

Fifteen years ago, I bought this modest 1,100-square-foot house. From the start, the plan was to make best use I could of the assets this quarter-acre provided. The grass is gone front and back. The 350-square-foot patio has become a closed in passive solar space that helps heat the house. There is edible landscaping all over. Automobile space has been reclaimed as the driveway was taken out and the one-car garage turned into a living space.

Surprising to some people, the Pacific Northwest is dry for months in the summertime so I installed a 6,500-gallon rainwater system for garden and landscape. The house has a solar water heater and heat pump, there are two water features landscaped with “urbanite” from my former driveway, and there are a greenhouse and cold frames.

Over the years, well over a thousand people have visited – green bike tours, permaculture classes, school groups, eco bike tours, curious neighbors, well known writers and media. Both the mayor and city manager think the place is great. This quarter-acre has activated many other transformation projects in the neighborhood and elsewhere.

My next-door neighbor has taken out part of his driveway in favor of garden space and replaced decorative plants out front with many food-producing shrubs and trees. We collaborated on a project taking out an expansive hedge on our property line and replaced it with edible landscaping.

Within a fifteen-minute bike ride, dozens of friends and neighbors are transforming where they live. There are front yards turned into gardens, green buildings, food forests, solar projects, fences down between like minded neighbors, shared properties, educational outreach and celebrations. There are mutual assistance networks and a sense of identity, we live in the River Road Permaculture Zone.

Building An Eco Home 

An Important Lesson about Urban Homesteading

We learned another important lesson: Almost any neighborhood and town has many assets and allies that can be helpful in transforming where we live. A surprising variety of organizations — ad hoc groups, schools, communities of faith, even city and county programs have agendas that fit perfectly with greening our communities. Taking the time, one can recognize many surprising opportunities for common cause, to help create a more peaceful and healthy world.

This blog will share practical information for home-scale property transformation. It will also describe collaborations in the neighborhood and great stories about tools, assets and allies in the community. Making these changes is simply about people taking the time to re define their priorities, recognize the benefits for taking action then, doing the work. Each positive story can be a platform to inspire others to action.

The ideal is to re purpose suburbia to use as a platform for creating a very different economy and culture that will be far more friendly to people and planet.

All MOTHER EARTH NEWS community bloggers have agreed to follow our Blogging Best Practices, and they are responsible for the accuracy of their posts. To learn more about the author of this post, click on the byline link at the top of the page.


Earlier this spring we started excavating a big hole next to our house to serve as a root cellar. We live without electricity and with about 3/4 of the year here in the High Desert having cool, refrigeratory nights a root cellar seemed like a great idea.Root Cellar 1.JPG

Digging a Root Cellar

We are also a fossil-fuel-free urban homestead so digging our roughly 11-by 9-foot hole was done completely by hand. About half of the wonderful clay in the hole was used for our “One-Day Cob House” workshop in May and harvested by workshop participants during that weekend (we’re especially proud of that stacking of functions). The rest we dug piecemeal over several months. While I enjoy digging I never do it for more than an hour at a time unless we’ve created some sort of deadline. We also had an intern with us for a few months this past summer and she got to develop her digging skills in the root cellar quite regularly. In fact, she also dug most of our driveway Hugelkultur beds and several holes in our backyard for tree guilds. Lucky girl!

When we got to about 3 and a half feet deep I called it quits. I’m optimistic that will be deep enough to make good use of the constant coolness of the Earth. We went with earthbags for the walls until above grade and then used Balecob to the roof. Earthbags seemed the perfect fit for several reasons:

• I like working with them
• We had a ton of clay, stone, sand from our recently dug up driveway beds. Really an ideal mix for earthbags. We also added about 48 oz. of Portland cement to each bag to harden them up.
• They are inexpensive. I bought 200 of the 14-inch by 26-inch variety for about $80 and used them all.
• They partner nicely with cob and strawbales 

root cellarI laid several inches of gravel on the bottom (including under the bags) and went round and round and up and up filling and tamping until reaching grade. In total we laid 9 rows of these bags. From there I added one more row of big bags (leftover feed bags from Feed World in Reno). These were heavy, but they got me about 8 inches above grade in most spots and are wide enough to hold a bale set on edge nicely. A bale is about 17 inches wide at its narrowest dimension (on edge) - the one I’ll be using above the bags. From what I recollect a strawbale set this way has an R-value of about 30. In addition to its insulative value, we chose to use bales because we want to cover their exteriors with luscious earthen plaster which we’ll get to put on and look at every day. 

Other Root Cellar Features

I also set in "deadmen" of leftover redwood 4-inch by 4-inch scraps so I can attach shelving and tie in the roof beams with the shelves and walls.  You'll also notice some vent pipes (black 4-inch ABS pipe) that stand up outside the wall and enter between the earthbags towards the floor on the inside. These will be cut shorter above grade and serve to improve air flow in conjunction with a high 6-inch vent on the door side of the cellar. Two low and one high on opposite sides of the cellar will bring cool air down and flush warm air out and provide needed ventilation for our future crops. Root cellars need three components to function well:  cool temps, high humidity, and good ventilation.

More to come as we finish and use our earthbag root cellar.

All MOTHER EARTH NEWS community bloggers have agreed to follow our Blogging Best Practices, and they are responsible for the accuracy of their posts. To learn more about the author of this post, click on the byline link at the top of the page.


If you spend enough time in the environmental movement, you'll undoubtedly get wrapped up in the philosophical discussions of what is the most “green.” Paper, or plastic? Off-grid, or grid-tied? Such debates are naturally going to arise in a movement whose goal is to improve the way people live on this planet, because the act of living affects our natural world many varied ways. Sometimes, improvement in one aspect of environmental impact has unintended consequences in another.

Green building is not without its own debates of this ilk. Should a new insulation product capable of drastically dropping energy consumption be used, even if it is manufactured with chemicals whose toxicity is not well studied? Should I stay in my existing energy hog of a home here in town, or build a new green home in a location that requires me to drive many miles each day to work and the nearest grocery store? Any project that successfully transforms from dream to reality is going to have to accept some compromises between competing environmental concerns. I work with customers every day who must contemplate these trade-offs, and have observed that green home projects are often guided by one of two very different general philsophies, each with their separate focus on what it means to be a truly green residence.

Resilient Off Grid Home Colorado

The Resilient, Self-Sufficient Approach

This school of thought is the older of the two. The goal is to disconnect the home altogether from the environmentally problematic systems that modern homes depend upon, supporting its own needs in a more sustainable manner.

This kind of green home has a plan for everything. Not connected to the electrical grid at all, a solar array, wind turbine, micro-hydro generator, or any combination of the above will charge batteries to power the electrical essentials of this house—although a propane generator is in place when even these systems fail. Heating for this home also often comes from propane, (it is generally too far away from town to have natural gas service) in combination with a trusty wood stove. Water comes from wells, greywater, and rain barrels; much of the food comes from the site. This home likely features strong passive solar design, and will be well insulated—although preferably with natural insulation materials such as cotton or sheep’s wool. Some modern conveniences, such as air-conditioning, are likely foregone, although enough will remain to satisfy the particular wants and hobbies of the homeowner.

This home in Colorado exemplifies the philosophy of resilient green design. It uses natural materials (adobe, wood-framed construction, interior tile and brick for thermal mass) and off-grid systems (solar electric system, solar hot water system for domestic hot water and assistance with hydronic radiant floor heating, all with propane backup) to remain resilient in an very remote area with common snowstorms and power outages.

The High-Tech Approach

This philosophy embraces technology to improve connections to the existing infrastructure. This home may look on the outside very similar to a standard home—minus the solar array--and it will use whatever technology is available toward the goal of ultra-low resource consumption. It likely uses mass-produced building products like spray foam insulation or structurally insulated panels (SIPS), to achieve exceptional levels of insulation. It will be extremely air-tight with the help of caulks, gaskets, and tapes, and will incorporate a mechanical fresh air system to keep the occupants healthy. It will likely be both heated and cooled, using ultra-efficient technology like a ductless mini-split heat pump or a ground source heat pump with variable speed blower and desuperheater for water heating assistance. It will likely be all-electric---the better to be powered by an on-site solar array—and hooked up to the existing electrical grid so as to allow the homeowner to use her solar when the sun shines, pull electricityNational Institute of Standards and Technology Test House from the grid when it is not, and send any excess generation from the solar back out to the grid as a credit against later grid use. It will use passive solar design whenever it can, with special coatings on south-windows to allow more heat transfer, and triple pane windows on other sides of the home.

The National Institute of Standards Net Zero Test Facility, pictured here, is one example of such a home. Using thick walls, air-tight construction, and high efficiency systems, the it was built to use 60% less energy than standard construction before the addition of the 10 kilowatt solar array and separate solar water heating system. It was also designed fit in with the look of the regular suburban homes around it.

Low-Loads Is What They Have in Common

Though the means to get there may differ, the common theme in both of these philosophies is low energy use--the first philosophy because of necessity, as the on-site systems must be able to supply all the home’s needs--and the second because of the cost benefits of negating electric bills. This means houses insulated above and beyond code levels. This means passive solar design principles used to their fullest extent whenever possible. And in either case, there is some portion of modern living that demands electricity: whether for an array of consumer electronics or just for a well pump. That means on-site renewable energy will always have a role to play, at least until the utilities start getting serious about deploying renewables for widespread grid generation.

All Of the Above!

As a green building consultant, I can usually tell which philosophy my clients are more likely to identify with after a few conversations—although of course, in real life, many projects take on aspects of both. My preference is for neither. Every attempt at green building can teach us something new about how to reduce our environmental impact. Every new green building advances the goal of a less impactful building stock in some capacity. A project really wins when it can find ways to accommodate multiple environmental goals. Low energy loads, and healthy, non-toxic materials. Resilience against what may come, without requiring the sacrifice of all modern luxury. Arriving at a product or process that benefits the environment, benefits people, and remains economical can sometimes be a long, iterative process. As an environmentalist, I believe it is a process that is essential to undertake.

Which philosophy do you identify with more strongly?

photo 1 credit: John Janus
photo 2 credit:


wink hubMy Wink hub now controls all my lighting, as well as other smart devices in my home.

Since I started making strides toward a sustainable lifestyle way back in 2007, I've known that the first and simplest step toward "greening" your home is to replace outdated incandescent bulbs with cool, clean LEDs. So, when my husband and I recently renovated a 1960s house in Charleston, I decided to take over the light bulb buying duties and finally complete my quest for LED livability. However, my first trip to the light bulb aisle in search of a swath of these eco-friendly illuminators left me wondering:

1. If I'll need to remortgage my new home in order to afford them, and
2. If I would need a second college degree just to understand which ones I was supposed to buy.

LED Learning Curve

Slowly but surely, LEDs are shedding their reputation for being too bright and ugly to fit into a home's décor. This is thanks, in large part, to manufacturers' enthusiastic (albeit government prompted) adoption of the technology. Today, there is rarely a case where you can't get an LED alternative to an incandescent. However, there are now so many on the market that when the average consumer is confronted by floor to ceiling bulb options, it's understandably easier to just grab that trusty (and cheaper) incandescent and run.

To address consumer confusion, manufacturers are attempting to educate the public on how to choose the right bulb through thorough package labeling. The problem is that there are so many numbers on each bulb, it's even more confusing. When I sent my mom a picture of this bulb I was considering, she replied, "$209 for a light bulb!?"

I quickly discovered that you can ignore most of those numbers. All you really need to focus on is the "wattage equivalent" and the "bulb type," (which is ironically often the hardest thing to find). The wattage equivalent helps you choose the same light level as your previous incandescent, and the bulb type will tell you whether it will fit where you want it to go.

The big number most people focus on, however, is the price. I know every argument for LED bulbs (75 to 80 percent less energy use, lasts up to 25 times longer, emits less heat) and I'm sold. But my husband's response to the sticker shock is understandable. $25 for a bulb you could pay $5 for requires a lot of explaining. I've tried the math: "This LED only costs $1.51 a year to run, versus $7.83 a year for that incandescent. Factor in the longevity of the LED bulb, estimated to last 20-30 years, versus one year for the incandescent, and the incandescent actually costs $128.3 to run over 10 years, compared to $40 for the LED."

But what he (and many people) need is to see some real, tangible benefit from this significant initial outlay. In order to justify a whole household switch to LED, I decided to investigate the benefits of turning my quest for LED livability into a "Smart Quest." After all, by controlling how much the lighting is on via smart technology (wirelessly connected light bulbs), I'll be enhancing the benefit both for the planet and our pockets. So I went room by room, researching the perfect light bulb set up for each scenario and seeing how I could incorporate home automation technology into the system.

The Bedroom

The first stop on my quest was the bedroom. We are midway through remodeling an old garage into a master bedroom, and for such a large room we needed eight recessed ceiling lights. My initial plan was to install the industry leading Philips Hue LED bulbs. Offering every color "hue" you could possibly want inside just one bulb, the Hue can do such magical things as turn on automatically to the color of the sunrise every morning. However I couldn't quite stretch my budget to the $480 it would cost to outfit my bedroom with eight $60 light bulbs. Thankfully, manufacturers are now following in Philips footsteps, producing connected bulbs which, while they don't offer quite the functionality of the Hue, offer the convenience of being Wi-Fi enabled at just a few dollars more than a regular LED. It's a lot easier to justify the upfront expense of LEDs when you are getting more from your bulbs than just light. Most of these smart bulbs require their own hub, which adds between $40 and $80 to the upfront cost, but also adds a host of functionality.

However, acquiring the right hub for each bulb and device is a challenge the smart-home industry is still conquering. Many devices come with their own hub, so if you bought them all you'd quickly be drowning in a clutter of hubs.

After going back to the drawing board I came up with a hybrid solution. I purchased eight "dumb," dimmable LED floods ($200) and one "smart" wirelessly controllable dimmer switch ($60). I then picked up the new Wink smart hub for only $1 (regularly $49, but I found a deal at The Home Depot where you could purchase the hub for $1 if you bought two other smart devices). The Wink hub promises to control all of my smart devices: both those I already have and those I'm considering purchasing, hopefully saving me from smart home hub overload. Now I can control the dimmer switch from my smartphone through the Wink hub and voila, smart lights without the $500 price tag. The dimmer switch also comes with a remote control, and courtesy of the Wink Home Automation system can connect to other smart devices so I can control my lighting with automated rules and shortcuts.

The Living Room

Our living room presented a conundrum. It has two recessed lights and a ceiling fan that are on the same circuit, meaning we can't have the fan running without the lights on (very irritating when you're trying to watch a movie on a hot steamy night). Here's where I was hoping these smart LEDs would really prove their worth to my husband. The ability to remotely dim or turn off individual bulbs means we will be able to turn off the lights without turning off the fan, and without paying an electrician $500 to re-wire the living room.

I excitedly purchased numerous smart bulbs, only to discover that they each required their own hub, and while the bulbs were individually between $25 and $30, the hubs were upwards of $100. I already have a hub and I didn't want another one. Luckily, those weeks of dead ends paid off, because this month GE launched the GE Link bulb that works with my Wink hub, and starts at $15 -- yes a $15 smart LED light bulb! Truly, when it comes to technology, just wait a while and what you need will appear. 

I ordered two GE Link 65W Equivalent BR30 Connected Home LED Light Bulbs at $19.97 each for my living room and three GE Link 90W Equivalent PAR38 LEDs for the hallway between the living room and bedroom. I am anxiously awaiting their delivery and the ability to control my home entertainment lighting from my smartphone. No more fighting over who has to get up to turn the lights off, and at least enough savings to spring for HBO.

Quest Completed

The benefits of "smartening" my LED bulbs are many: convenience, yes, but also energy and time savings. No more running around the house making sure my family of four has switched off every light before I leave. I can simply set up a geo-fence program to switch everything off when I walk out the door.

The total cost of my quest is currently about $370, and the benefit is that I can add and replace bulbs to the system for between $15 and $25. The beauty of LEDs means I probably won't need to replace any until my kids are buying their own homes, but I will be adding to the array; to my kid's rooms and the bathrooms, when the CFLs in there eventually flicker out. I estimate the total cost of the remaining bulbs to be bought at $200, bringing my total expenditure on a whole house, Wi-Fi enabled "Smart" LED lighting system to just over $500.

As this infographic comparing the two main types of LEDs I've chosen with their incandescent equivalents shows, over 10 years I will save between $80 and $125 per bulb. With an estimated total of 26 bulbs in my home, that's a total of $2,000 to $3,300 over the next decade. Not bad, considering all of those savings are in electricity and manufacturing, meaning I'll be leaving a lighter footprint on the planet.

Jennifer Tuohy shares her chronicles of trying to mesh her love for technology and being green into the integration of her home renovation. In Jennifer's latest adventure, she explores using home automation and Smart LED light bulbs to save energy and money. Are you considering Smart LED light bulbs for your home? Check out the LED bulb options at The Home Depot.

All MOTHER EARTH NEWS community bloggers have agreed to follow our Blogging Guidelines, and they are responsible for the accuracy of their posts. To learn more about the author of this post, click on their byline link at the top of the page.


There is an ideal relative humidity range for our health and that is somewhere between 35% and 55%. In modern life we have introduced many new sources of moisture into our homes. Daily showers, laundry, cooking and dishwashing tend to create concentrated bursts of humidity. Because conventional construction can tolerate very little increase in humidity without condensation/mold problems moisture from these sources must be mechanically sucked out of the home. At the same time most heating systems tend to make the air too dry for optimum health, and so homes must be humidified to reach healthy levels. So on one hand, we are using technology to suck moisture out and on the other, we are using it to add humidity back in! Is there a better solution. econest-paula-baker-laporte-building-biology-creating-a-healthy-indoor-climate

This adobe building designed by Paula features naturally sealed earthen floors, interior, unfinished adobe walls, unsealed woods and clay-based plaster. It has built-in capacity to regulate the interior climate.

Building Biology explains how we can maintain healthy humidity in our homes by working with nature.  Certain building materials such as unfired clay, wood and natural fibers have the ability to naturally regulate indoor humidity provided they are not sealed with impermeable finishes. They can effectively capture humidity when the levels are too high and then release it again once the ambient levels drop thus buffering these extremes and creating natural humidity ranges. This material characteristic is known as hygroscopicity. This explains one aspect of the value of using natural unadulterated building materials, finishes and furnishings. Although exhaust fans are still a good idea they are a supplement and not a dire necessity for the health of the home.

There is a trend in conventional construction to take the exact opposite approach in finishing our homes, making everything impervious for ease of cleaning and maintenance. Surfaces are covered with a thin layer of plastic in the form of various types of man-made polymer finishes. While these wet applied finishes were once a great source of indoor pollution, there are now many choices for low-zero VOC synthetic finishes. Although with careful selection it is now possible to apply synthetic finishes without releasing poisonous gasses there are a number of subtle consequences to consider. These include:
An imbalance in the electro-climate that manifests in frequent static electric shocks
Reflective surfaces that have a negative impact on the acoustics and can create visual glare
A loss of hygroscopicity which leads to imbalanced and unhealthy ambient humidity

Here are some ways to introduce a higher level of hygroscopicity into our homes:
Use natural finishes that maintain porosity such as beeswax and natural oils
Use unfired clay in the form of clay plasters or exposed earthen walls and floors.
Don’t seal wood surfaces where a seal is not required such as ceilings or on exposed timbers
Use natural cottons and wools instead of synthetic fabrics for upholstery and drapery

The benefits of natural finishes go well beyond visual appeal. They aren’t maintenance-free. They require occasional re-application but they patina with age and these natural finishes reward us daily with a better indoor environment. It is a life-style choice.

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