Clay Walls: Using Earthen Plasters and Paints in Your Home

Clay walls beckon you to come closer—to see the subtle variations in color, to feel the textured surface, and to embrace the beauty of this natural and sustainable building material.


| November/December 2011


Dig your hands deep down into the earth. Get beneath the dark layer of topsoil and into the rich subsoil, where the earth gets dense and sticky. Here you find clay, a plentiful raw material humans have been using throughout history to build and decorate structures around the world. Rudimentary clay plasters waterproofed our ancestors’ primordial structures. Refined versions covered the walls of well-to-do 19th-century European homes. Rich red clay was baked into bricks to form the shape of the humble adobes that dot the southwestern United States. Today we can take advantage of this healthy, sustainable, user-friendly material to warm up the walls of our homes.

“Clay is one of the most abundant raw materials available,” says Adam Weismann, coauthor of Using Natural Finishes. “It’s right under your feet—right now. You just have to know how to use it in a living space.” When mixed with water, natural fibers and aggregates, clay acts as a binding agent, adhering the malleable mix to walls. It can be manipulated into varied shapes and styles—clean lines for modern and traditional tastes or undulating curves for an organic feel. If you can get the materials from your own land (or from a friend’s), the cost is minimal, and sourcing locally conserves the energy that would otherwise be used for shipping. “It’s also extremely rewarding and visually pleasing when the building materials that create a structure are literally a part of their natural surroundings,” Weismann says.

Dig Deeper

Making your own clay plaster out of materials available onsite is an inexpensive, local option, but it’s not easy. Digging clay and creating the proper mix for use on walls can be a labor- and time-intensive endeavor. If you want to give it a go, see our recipe and instructions at the end of this article. If you’re in the market for clay walls that require less effort, purchasing a ready-made mix from a manufacturer such as American Clay is an easier route. Based in New Mexico, American Clay sources 72 percent of its materials from within 500 miles of its manufacturing site, and its pigments are made of naturally occurring oxides and minerals from the United States. Most of its plasters are shipped as 50-pound bags of powder, which you hand-mix with water and a packet of one of the company’s 42 colored pigments. At about $1 to $1.35 per square foot, it costs more than the DIY version but provides consistent, colorful results. Want the look of clay with even less work? Consider roll-on clay paints (see Resources), which offer the warmth of clay but aren’t as thick and textured as clay plaster.

When made without synthetic additives, natural clay plasters and paints are entirely nontoxic, making them ideal for people with chemical sensitivities, pregnant women, young children and anyone who wants a healthy home. Clay plaster walls’ thick thermal mass means they also help regulate temperature and humidity. “Clay is breathable,” Weismann says. “It can safely absorb and hold moisture vapor when humidity levels are high and then release it back into the atmosphere as the air becomes dry.” This provides a comfortable living space and helps prevent condensation and mold. In fact, museums and galleries have begun using clay plaster to help protect artwork and artifacts. 

Hands On





mother earth news fair 2018 schedule

MOTHER EARTH NEWS FAIR

Next: June 2-3, 2018
Frederick, MD

Sit in on dozens of practical workshops from the leading authorities on natural health, organic gardening, real food and more!

LEARN MORE



Subscribe today and save 58%

Subscribe to Mother Earth Living !

Mother Earth LivingWelcome to Mother Earth Living, the authority on green lifestyle and design. Each issue of Mother Earth Living features advice to create naturally healthy and nontoxic homes for yourself and your loved ones. With Mother Earth Living by your side, you’ll discover all the best and latest information you want on choosing natural remedies and practicing preventive medicine; cooking with a nutritious and whole-food focus; creating a nontoxic home; and gardening for food, wellness and enjoyment. Subscribe to Mother Earth Living today to get inspired on the art of living wisely and living well.

Save Money & a Few Trees!

Pay now with a credit card and take advantage of our earth-friendly automatic renewal savings plan. You’ll save an additional $5 and get six issues of Mother Earth Living for just $19.95! (Offer valid only in the U.S.)

Or, choose Bill Me and pay just $24.95.




Facebook Pinterest Instagram YouTube Twitter


Copyright 2018, All Rights Reserved
Ogden Publications, Inc., 1503 SW 42nd St., Topeka, Kansas 66609-1265