True Timber Frame Homes:

In a True Timber Frame home, the timber frame is the structural skeleton of the home. The timber frame is wrapped with SIPs (structural insulated panels) that span the large spaces between each timber of the frame and are known for their superior insulation capabilities. The true timber frame home may required more specialized labor and front-end costs and is generally the most costly option.

  • Structural timber frame skeleton provides the structure of the home
  • Timber frame throughout the entire home
  • SIP Panel exterior enclosure

Structural Timber Frame Framework

Wrap your frame with Energy SIPs!

Structural Insulated Panels (SIPs) Enclosure

Energy SIPs combine structurally rated interior and exterior OSB sheathing with a rigid, solid core of insulation in one composite panel. Energy SIPs are structural and will span the large spaces between each member of the timber frame. Energy SIPs create a continuous whole-wall system with virtually no thermal bridging, breaks, or air infiltration. The result is a tight building envelope that will contain the inside conditioned air, eliminate air infiltration, and result in significantly less heating and cooling fuel consumption and lower energy costs, while providing exceptional living comfort.

Energy SIPs offer superior R-values over conventional construction. R-value is defined as a measure of the capacity of a material, such as insulation, to resist heat flow. The higher the R-value of a material, the greater its insulating capacity. Energy SIPs’ R-values range from R-16 to R-50, depending upon the type of foam core and its thickness. Our insulation types are described below.

Timber Frame Being Enclosed With SIPs

Energy SIPs from Natural Element Homes are Factory Pre-Cut

Natural Element Homes offers CNC factory pre-cutting of our Energy SIPs, a process that cuts installation time and virtually eliminates on-site panel waste. Our pre-cut panels arrive at the jobsite labeled and ready to assemble.  This allows speed of installation and virtually eliminates job site panel waste.

Here’s how our process works:  We develop panel drawings as part of the production phase of our design process. The dimensions for window and door openings, edge routs, bevels, and any other cutting requirements are programmed electronically and fed to CNC pre-cutting equipment. This automated equipment is designed for accuracy and precision. After cutting, each panel is labeled to correspond to the Panel Layout drawings for identification and assembly on the jobsite.

Our Energy SIPs come factory pre-cut with joinery systems and required installation accessories for the tightest fit, highest performance, and simplest installation.

Polyurethane Panels

Our Class I fire rated closed-cell polyurethane foam contains no formaldehyde or CFCs. Polyurethane foam is a thermoset plastic which does not melt and maintains structural integrity until consumed. It is far more fire-resistant than most conventional building materials. Polyurethane foam does not promote the growth of mold, and serves as its own vapor barrier. It’s a common, proven building product that is found in most homes and on store shelves.

Our polyurethane panels are custom-manufactured to the specifications provided in the shop drawings by injecting high-quality polyurethane between two sheets of oriented strand board. The polyurethane acts as its own adhesive, providing a strong, consistent bond across the entire panel. We design the panels to include features like pre-installed corners, door bucks, window bucks, subfacia, electrical conduit,  and outlet boxes to ensure the quality of construction while drastically reducing the time involved.


  • 4-inch Panel = R24
  • 4-1/2-inch = R28
  • 6-7/16-inch = R40
  • 8-1/4-inch = R50

EPS Panels

Expanded polystyrene (EPS) is a product that provides smart solutions and durable, efficient results. Equally important, EPS is a sustainable product that is recyclable and environmentally sound. The lifecycle of EPS has been studied, documented and proven to leave a smaller footprint on our planet than comparable materials. It is a smart option for SIPs and a responsible choice for the environment.

Our Expanded Polystyrene (EPS) SIPs offer a high quality, competitively priced alternative to conventional construction. EPS panels contain a core of rigid cellular foam plastic. The EPS foam core is molded in large blocks and cut to size, then laminated to the OSB skin surfaces with an extremely strong and durable one-part Urethane adhesive. EPS SIPs are installed using plywood key splines to join the panels together.


  • 4-1/2-inch = R15
  • 6-1/2-inch = R23
  • 8-1/4-inch = R29
  • 10-1/4-inch = R37
  • 12-1/4-inch = R45