Take a 1951 home, laser scan the exterior, then build new walls in a factory to tight specifications and then plop them right over top of the old walls. The result: a solar-powered, net-zero home with R40 insulated walls that makes money on its utilities. This is the Sandercock family home and a pilot where Butterwick Projects is using the Dutch EnergieSprong strategy of reskinning old homes to easily get them to net-zero.
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