150 Cordwood
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Transcript of 150 Cordwood
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CORDWOOD CONSTRUCTION: Progressive Home Building Techniques for the Construction Expert
July 27, 2011 Presentation By: Scot Runyan
Author of How to Become Rent and Mortgage Free
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What is Cordwood Construction?
• Discovered cordwood construction in 1984 while doing research for my book How to Become Rent and Mortgage Free .
• Cordwood construction of “cordwood masonry” is a natural building method. It’s highly labor-intensive, but inexpensive to build.
• The majority of American cordwood structures are located in Wisconsin, though several are located in Iowa, Minnesota, Michigan, Illinois, and Montana.
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The Cordwood Technique
Cordwood construction is a technique that utilizes whole or split wood,
usually 6” to 24” inches long or more, layered width wise in a bed of
mortar. The walls produced are textured with exposed log ends.
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The Cordwood Technique
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History of Cordwood Construction
Cordwood was used by early pioneer builders who were simply responding to conditions on the frontier.
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History of Cordwood Construction • Many existing cordwood
structures are barns built in the 1920s and 1930s during the Great Depression.
• These structures were built using available and affordable materials because high-quality heavy timber and stone were too costly and not readily available.
• Homes built using this technique and were called “Depression Housing” in parts of Wisconsin, Vermont, and upstate New York.
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Cordwood Renaissance
• The last 30 to 40 years has seen a renaissance in cordwood homes popping up across the U.S. and Canada.
• They are inexpensive to build, easy for the do-it-yourself homebuilder, energy efficient, and a natural construction method.
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Working With Cordwood
Cordwood Before Cordwood After
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Working With Cordwood
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Early Cordwood Structures
Circa 1929
Home in Port Angeles, Washington
Built in 1900
Mecikalski Store
Jennings, Wisconsin
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Examples of Cordwood Structures
Home located in the Upper Peninsula in Michigan
Built in 1930s
Peace of Art Café
Del Norte, Colorado
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Examples of Cordwood Structures
Home in Carlson, NY
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Cordwood in Action
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Interior of Cordwood Homes
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Creative Use of Cordwood
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A Cordwood Home Coming Near You…
2007
2008
2010
2009
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The “Why” of Cordwood
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They say that necessity is the mother of invention...
When it comes to building a
home, you can either pay someone else (forever) to
build your home or…
You can build it yourself and “leverage your labor” for the
rest of your life.
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Cordwood Techniques are:
Natural
Sustainable
Renewable
Recyclable
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The cordwood home is easy to build, especially for the novice.
All you need is a:
Tape measure
Square and a Level
Shovel
Wheel barrow
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No water intrusion No critters
Solid wall construction leaves no space for critters.
Solid wall construction eliminates many of the areas where water intrusion becomes a big problem in “stick frame” homes.
Best practices with a cordwood home include a large roof over hang of 3’-6’.
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Building With Cordwood Saves Money
The cordwood home is less expensive to heat.
Less expensive to cool.
This is because of the large thermal mass and the high R-Value in the exterior walls.
Not only that, you save money in material costs.
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Stick Frame vs. Cordwood
32’ x 40’ one-story home = 1,280 sq. ft.
• 144 linear feet of wall 8’ high = 1,152 sq ft of
surface • 1,152 sq ft of sheet rock hung, taped and textured
@ 1.30 sq ft = $1,497 • 1,152 sq ft interior prime & painting @.50 sq ft =
$576 • 1,152 sq ft of “Hardy plank siding” @ $5.00 sq ft =
$5,760. • 1,152 sq ft of exterior painting @ .50 sq ft = $576 • 1,152 sq ft of R-19 fiberglass batt insulation @ .90
sq ft = $1,036 • 1,152 sq ft of stick framed lumber @ 3.25 sq ft =
$3,744 • 1,152 sq ft of OSB sheething @ .50 sq ft = $576 • 1,152sq ft of TYVEK @ .25 sq ft = $288
Total cost of materials and skilled labor $14,053
32’ x 40’ one-story home = 1,280 sq. ft.
• CMU Block Post and Beam • 914 CMU Blocks to build the 20 columns &
bond beam @ $1.25 each = $1,142 • 1,274 linear ft of #5 Rebar @ .45 per ft =
$573 • 7.5 yards of Grout @ $100. per yard = $750 • Pump truck $350 • 3 yards of mortar @ $100. yd = $300 • 5 cords of Cedar @ $150. per cord = $750 • Foam Insulation $250. • Rebar Positioning Guides $50 • 1 yard sawdust chips for mortar $100
Total cost of materials only, no labor $4,265
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Top 7 Best Practice Starter Tips
1) The Mortar Mix – 3:2:1:1 of sand, sawdust, Portland cement, and lime
2) Prepping the cordwood – The cordwood should be peeled, cut, split and dried for at
least a year
3) Soaking the cordwood – The cordwood should be soaked (or dipped) for 15 seconds in
borax solution (4:1 water to borax) and dried overnight
4) Life Line exterior UV blocker
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Top 7 Best Practice Starter Tips
5) Permachink/Log Jam
– This is a well-known product for repairing any loose logs.
6) Fomo Foam
– Is a good, closed cell, expanding foam for insulating the dead air space created in the walls.
7) CMU block
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In conclusion...
• With so many people currently out of work, it just makes sense to use a construction method that is relatively inexpensive.
• This will allow the individual home owner to “leverage their labor” into their home
• Allowing homeowners to save money for the rest of their lives.
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Thank you!
For books and plans on Cordwood Construction Visit these sites by Richard Flatau.
Richard was very helpful in gathering this information and also editing the content.