The project, from start to finish, represents an unwavering commitment to Cradle-to-Cradle construction.  All new materials brought in wherever possible were re-purposed, or made of recycled content and locally sourced.

Non-toxic, VOC-free construction materials were selected & used exclusively to ensure superior indoor air, zero offgassing, and no negative impact to the environment throughout their life cycles.

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Cradle-to-Cradle Envelope Insulation

Product	Component	Description
	ICF	Concrete forms made of slag, recycled wood pallets, and insulated with rockwool form the extension’s reinforced concrete structure on South and portions of the East elevations.
	Rigid Insulation	Made entirely out of aerated recycled glass, Foamglas is a rigid insulation we used below slabs and around footings.  It entirely clads the envelope & forms a vapor, fire, termite, radon, and thermal barrier.
	Floor Structure	Lightweight temporary steel floor structure eliminates the need for extended forming and greatly reduces lumber used in construction and allows column-free interior spans.
	Borated Cellulose Insulation	National Fiber dense-pack cellulose is simply the cleanest, most organically produced, local recycled cellulose insulation available on the market today.   Together with solid service and installation support, the company and product are an end-to-end solution.

We used Foamglas over CMU block foundation wall in direct contact with Foamglas over stud walls.

Unbroken layer of Foamglas encasing both ICF new construction (left) and retrofit woodframe (right) sides of building envelope.   Foamglas bonded with VOC-free adhesive as a primary airtight layer.

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Building Structure

Note recycled wood & portland cement ICFs, mineral wool, and recycled steel rebar.

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 Interior Framing

The existing home was carefully dismantled, stud by stud

We salvaged 2×4 studs from the original house, and staggered them to create the third, innermost wood framing layer to minimize thermal conductivity.

Reclaimed original studs among new steel columns.

Original wood studs used along with new FSC-certified lumber over large sill plates.

Original 2×4 studs, original subflooring, new FSC-certified lumber, and new steel bracing.

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Interior Insulation

Blown Cellulose Insulation by National Fiber is made of recycled newspapers.

Dense-pack cellulose was blown into both new and retrofit walls.

PolyIso / Perlite Boards

Repurposed from a Massachusetts warehouse and slipped UNBROKEN between stud layers.

We took delivery of an entire truckoad of these boards

And slipped them- unbroken by studs- in between the 2nd and 3rd stud layers, both of which were filled with dense-pack cellulose.

Soy-based sprayfoam insulation was used in the roof joists, coming into direct contact with wall insulation.

Hambro Flooring System – Second Floor

An ingenious system that allowed us to 1) re-use scrap plywood from around the jobsite and 2) BORROW hangers that are reused from project to project to set our poured concrete 2nd floor.

 

Once the concrete is set, the hangers were returned to Hambro Corp.

In addition, we did some rather ingenious things with steel mesh and structural engineering to use as little concrete as possible while allowing for a column-free span.

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Garage –> Garage/Mechanical Room

Original garage studs were reused in framing of new garage.

Recycled steel being installed by crane

Salvaged studs used to frame new steel-framed garage.