Straw Bale Home Features Concrete Walls and CountertopsProject submitted by Seth Cluley, Tellus 360 Design & Build, Lancaster, Pa.
Straw bale walls in the master bath are hidden behind a gray decorative concrete wall overlay sealed with a waterproof acrylic.
The decorative concrete overlay (left) was given a textured finish to match the adjacent plaster-covered walls in the master bath.
The kitchen island, countertops, window sills and backsplash are all cast-in-place concrete, integrally colored a smoky gray.
The 8-foot-long backsplash and window sill in the kitchen were cast in one piece.
The same overlay system was used on shower walls in the second-floor bathroom. The window sill is also concrete.
You would never know by looking at the modern interior of this unique eco-friendly home located in Lancaster, Pa., that the walls are actually made of straw bales, an age-old construction material enjoying resurgence in the green building community. The marriage of old-world techniques and modern approaches is a theme carried throughout this home, which is built of locally salvaged materials combined with newer sustainable alternatives, including concrete shower wall overlays and countertops.
Occupying a small and often-forgotten segment of historical home building, straw bale structures provide for ultra-efficient spaces with an all-natural approach, according to homebuilder and owner Jesse Pellman of Longview Structures, Manheim, Pa. “Clean, holistic, quiet, and with a uniquely approachable aesthetic, bale homes possess character that’s hard to come by with most new construction methodology,” he says.
This character called for a unique approach to the home’s interior finishes, says Seth Cluley of Tellus 360 Design & Build, the installer of the concrete wall overlays and countertops. “Jesse hand stacked all the straw bales, which led to wonderfully modeled plaster walls, including in the master shower area,” he says. “Pretty much everything in the house was being handmade, so hand making the kitchen counters fit right in. Also, Jesse’s design called for a salvaged and reclaimed look and feel. He was working towards LEED certification.”
Because the plaster-covered straw bale walls weren’t perfectly flat and needed to be waterproofed, Cluley covered the shower walls with an eco-friendly cementitious resurfacing material called Deco-Poz. “I used this overlay because even at a 1/8-inch thickness I can create a watertight surface, which is essential in a shower,” he says. The system contains recycled pozzolan additives that reduce the portland cement content up to 25% while increasing compressive strength and durability.
Cluley primed the shower walls with a nontoxic water-based epoxy and then applied the wall overlay using Japanese plaster trowels and concrete pool trowels to give it a rustic texture that matched the bathroom’s plaster walls. Finally, he sealed the shower surround with a marine-grade acrylic urethane designed for submersible applications. The same resurfacing system was also used on the walls in the home’s second-floor shower.
In the kitchen, concrete was also the best solution for the countertops, island, window sills and backsplash. Because of the irregularities in the walls, template molds were used to make the concrete window sills. Cluley cast the kitchen island and countertops using Buddy Rhodes bag mix in a smoky gray tone, giving the island a decorative double-radius edge.
To see more photos of the straw bale house, visit www.longviewstructures.com/projects/.
Cementitious wall overlay: Deco-Poz gray, from EcoProcote
Epoxy primer: Eco-Tuff, from EcoProcrete
Acrylic urethane sealer: Eco-Tuff High Traffic Clear Coat AQ
Concrete countertop mix: Buddy Rhodes Counter Mix, in smoke
Countertop edge forms: Z-Counterform (square and double fancy profiles)
Tellus 360 Design & Build, Lancaster, Pa.
Longview Structures, Manheim, Pa.