Turning Whole Trees into High-Value Building Materials

Roald Gundersen's current projects is a 5,300 square metre grocery store in Madison, Wisconsin.
Roald Gundersen’s current projects is a 5,300 square metre grocery store in Madison, Wisconsin.

“Rather than chipping trees and re-forming the pieces with adhesive (like OSB), Roald Gundersen’s company, Whole Trees Architecture and Structures, has developed methods for using whole peeled logs for columns and trusses.

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An eco building named Speckled Wood

Speckled Wood is a roundwood timber-frame eco building. It was built in 2012, at Swan Barn Farm in Haslemere, on the borders of West Sussex and Surrey, by the National Trust’s Black Down countryside team and volunteers, led by Head Ranger David Elliott.

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Small-Diameter Wood: An Underused Building Material


Many of those in need of housing have access to small-diameter trees in nearby forests. These trees can be used to produce materials that are ideal for building affordable homes. If used in conjunction with energy-efficient straw bale construction and other natural materials, small-diameter wood can be used to create a better home than most building systems, at lower cost.

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Building The Roundwood Spiral Staircase

Spiral staircase at Ziggy and April's new house at Dancing Rabbit Ecovillage
Spiral staircase at Ziggy and April’s new house at Dancing Rabbit Ecovillage

“At last, I’m here to report that April and I accomplished building the round wood spiral staircase. Over the course of five days, literally up to the day before we left Dancing Rabbit, we installed the risers and treads. [Shock! They’re selling their home and moving to Berea, KY.]

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Dunne Family Strawbale Update

Dunne family strawbale house under construction -- December 2013
Dunne family strawbale house under construction — December 2013

Jay sent us this tip. The Dunne Family house is progressing nicely. The roof is on and straw bales are up. Plus, they now have a blog. We profiled their project one year ago: Dunne’s Hardware Store …NOT!

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Natural Design/Build Materials & Methods

Round timbers outperform milled timbers of the same dimension.
Round timbers outperform milled timbers of the same dimension.

“Round Timberframing. Harvesting trees from the site where we are building and using the trees as round structural members is ideal. Certainly this is time and labor intensive, although structurally, round timbers outperform milled timbers of the same dimension. This is because of the natural spiral form of the tree grain which is lost when the tree is milled. This spiral form is what allows tree branches of large girth to hang horizontally to limits that seem unbelievable.

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