Structural Insulated Panels R Value

At less than the cost of factory sip systems ez sips build in place structural insulated panels are changing the way homes are built.

Structural insulated panels r value.

Ez sips are 4 foot wide eps insulation panels that fit into 2 6 wall sections like a glove. The concept is simple. The r value of each osb facing is r 0 55. More importantly because all types of sips have solid insulation completely enclosed with wood sheathing they are not subject to any convective currents like fiberglass insulation.

The vast majority of sips are being manufactured using expanded polystyrene eps foam board insulation a closed cell type of insulation this type of insulation when used in structural insulated panels offers an r value measurement of insulation of r 4 to r 5 per inch of thickness. Calculated r values for generic structural insulated panel sip including 7 16 oriented strand board osb on each side. Expanded polystyrene eps is type i per astm c578 11. R control sips or structural insulated panels are a superior building envelope solution that provides the benefits of insulation and structural performance in a single building product.

What style of panel will best suit your needs. Expanded polystyrene with a stated r value of r 3 9 per inch at 75 f was tested at r 4 2 at per inch at 50 f and r 4 4 per inch at 25 f. Raycore s 5 1 2 inch thick polyurethane sip panel has an r value of 42. Thermocore s patented 4 r 24 panel is the highest r value in a standard jamb wall 4 9 16 thermocore panel systems was the first panel company to offer an optional plumb eve.

To reach a similar r value with a sandwich panel you would have to purchase their 10 1 4 inch thick panel with an r 40 or their 12 1 4 inch thick thick panel with an r 48 insulation value. Thus the effective r value of a 2 x 6 wall with all its thermal breaks is about 15 62 which is less than the standalone r value of the insulation pocketed between the studs. Lumber is still used to connect eps sip panels to each other. Expanded polystyrene insulated panels.

Zip system r sheathing is the simple all in one structural panel with built in exterior insulation. Extruded polystyrene xps is type iv type x per astm c578 11. That s 75 percent more r value for half the price. However insulspan manufacturers structural insulated panels in sizes up to 8 x 24.

All of thermocore s structural insulated panel sips innovations results in significant time labor and most of all money savings for you. Raycore structural insulated panels are available in varying stud configurations.