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Custom home built by Norman L Graham

Super-Insulated Home

Super-Insulated Home 3D rendering and completed energy efficient home

The following home has been sold, but we'll be more than happy to build and customize your own super-insulated home. Simply contact us to get started!

You can now enjoy a Green home that is more than 40% more energy efficient than other new homes built to current codes. This new Super-Insulated Green home has an insulation package that far exceeds code-mandated "R" values, which are a way of measuring the resistance to heat flow through a given thickness of material. The higher the "R" value, the greater the resistance and the better the insulation.

The Problems

In a typical home with 2 x 6 framing and 1/2" sheathing, the cavity between the framing members is filled with insulation, but the framing members themselves are a source of heat loss. No insulation is installed outside the 2 x 6 studding.

In a standard construction, code-compliant home, there is always a deficiency of insulation at the wall/roof connection. Because of the way roof systems are constructed, there is typically only room for 4"-6" of insulation. This greatly reduces the "R" value of the ceiling/attic insulation in these areas.

The Solution

These issues and many more are addressed in this new Norman L Graham Inc Timberline house. Continue reading to see how we are exceeding the insulation levels required by codes.

Insulation Standards

Code Home Requirements NLG Inc Timberline House
Basement Walls R-0 Basement Walls R-22
Exterior House Walls R-20 Exterior House Walls R-30.5
Ceiling/Attic R-38 Ceiling/Attic R-60


Several layers of insulation board are installed outside the 2 x 6 wall with 1/2" OSB sheathing. A layer of 1" foam board insulation (R-6.5) is installed next. This is followed by a layer of 1/2" Styrofoam insulation board (R-3). All seams are taped to reduce air infiltration. Total wall "R" value is 30.5.
See #2 on drawing.

Insulation Specifications

R-21 spray foam is used in lieu of standard fiberglass batt insulation between the joists at the exterior wall. This not only provides insulation but also a tight "air seal" at an area where much heat loss normally occurs.
See #3 on drawing.

The 2 x 6 wall stud cavities are filled with cellulose insulation which is sprayed into the cavity. This reduces the 'heat loss gaps' so common with standard fiberglass batt insulation.
See #2 on drawing.

Roof trusses are custom designed with a "raised heel" to allow for the installation of full height insulation at the wall/roof connection.
See #1 on drawing.

All drywall joints in the ceiling/attic locations are sealed with spray foam insulation.

An insulated basement wall by Ideal Precast (R-21) is used rather than uninsulated concrete block or poured concrete.
See #4 on drawing.

A high efficiency advanced technology heat pump water heater is installed in the home.

A heat pump water heater uses fans and an evaporator to pull warmth from the surrounding air and transfers it to the water being heated in the storage tank. The water heater is located in an insulated basement, further enhancing its efficiency.

The following home has been sold, but we'll be more than happy to build and customize your own super-insulated home. Simply contact us to get started!

Floor Plans

First Floor Plan
Second Floor Plan
Foundation Plan
Section Details

Photo Gallery