Exterior Wall Insulation Design

If the exterior wall sheathing is below the dew point temperature condensation will form on the sheathing.

Exterior wall insulation design.

Lower exterior wall clad in 1 inch thick stone veneer atop a backerboard with a pressure treated 2x4 attached vertically to allow additional roxul batts in the 1 1 2 inch cavity for insulation and drainage. Since modern two by fours are not 4 inches the true depth of the wall cavity is 3 1 2 inches. So in an. Insulation for 2x4 walls most wall assemblies especially those in older homes are built with two by four 2x4 studs.

Non structural exterior wall sheathing also called insulating sheathing is installed on the exterior wall to add insulation and provide a radiant barrier. A continuous layer of insulating sheathing applied to the exterior surface of a wall will minimize condensation and moisture levels. Insulating sheathing comes in various r values. It s installed over the exterior walls of the home and can have several purposes from lending structural support to helping to insulate the home.

Building codes and green building standards are continuing to raise the bar on energy efficiency and high performance in buildings. In most wall applications you will use r 13 or r 15 kraft faced fiberglass insulation rolls for these two by four stud walls. The energy performance of exterior walls is enhanced by continuous insulation between the siding and the framing which may also influence the selection of a vapor retarder in the wall. For the outside facing walls of your home insulating exterior walls is a cost effective way to reduce heat loss and help prevent moisture buildup in your home year round.

Non structural exterior wall installation of the sheathing is on the exterior or interior side of the structural sheathing. Best for unfinished walls floors and ceilings. For this third wall to work almost everywhere except alaska and north of flyn flon where we would not insulate even within a relatively non conductive wood structural frame we would split the thermal resistance of the insulation on the exterior of the structural frame with this insulation within the structural frame at least 50 50. As these walls are your home s first line of defense it s important that the insulation you use accounts for all of the changing weather conditions outside.

These are pre cut sections of insulation that are usually fiberglass although cellulose mineral wool natural fibers and plastic versions are also available. Designed for easy handling and use between framing such as studs and joists making it among the best insulation for walls. Having a central screw that attaches the panel to the wall and a separate screw attaching exterior furring strips to the rail breaks the thermal bridge. The advantages are plenty here panels are between 4 5 inches and 8 inches thick the exterior insulation is continuous and they can be attached with 6 inch 10 screws from 4 to 6 inches long.