Energy Efficient


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Annual utility costs in a CELBLOX building can be up to 50% less. One of the most basic elements of any energy efficient building is a well-insulated, sealed building envelope. Such an envelope serves as a thermal, moisture and air barrier between outside and inside environments and makes a significant contribution to the overall energy efficiency of the building.

An exterior OSB or plywood sheathed, wood framed 2” x 4” or 2” x 6” wall with R-19 BATT fiberglass insulation in the framed cavities leaves 23% of a traditionally framed wall actually insulated at an R-value of R-4.38 in the case of 2”x4” framing due to the thermal bridging caused by wood studs. With advanced framing techniques (24” on center rather than 16” on center) still 16% of the wall is left uninsulated on the interior. This leaves a wood framed wall insulated with R-19 insulation at an actual R-14.5 and highly vulnerable to air and moisture infiltration.

Today, a panel of XPS continuous insulation is required by code on the exterior of the wood frame wall assembly to enhance the insulating ability of wood framed construction. The addition of 1 ½” R-4/inch XPS takes it to R-18.5.

Conventional wood framed walls are porous with a typical structure ranging from .45 to 1.05 air changes per hour. More specifically, in a wood framed structure ½ or more of the structure’s conditioned air is exchanged every hour

A CELBLOX insulated concrete wall has 2 1/2 “ of continuous insulation on both the exterior and interior sides of the building envelope and the thermal mass effect of the concrete sandwiched between the insulation works to eliminate the air infiltration that is the major cause of heat loss in a wall assembly. The insulation value of a CELBLOX exterior wall is an actual whole wall R-value of R-25.

Energy Use of Single-Family Houses with Various Exterior Walls (PDF)