Murus combined several innovative elements in their Polyurethane (PUR) Structural Insulated Panels (SIPs). This industry-leading product uses a specially designed polyurethane closed-cell foam that offers several crucial advantages: unmatched thermal performance, superior R-values, and thermal-set plastic (does not melt) properties that earn Murus polyurethane SIPs a Class I Fire Resistance rating.

Murus 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.

Murus Extruded Polystyrene (XPS) SIPs provide an excellent alternative to EPS, where higher R-values and thinner cross-sections are required and budget considerations are not a priority. The XPS foam is a rigid cellular closed-cell foam, and the manufacturing process consists of extruding polystyrene foam into a pre-determined length and thickness, milling it to assure dimensional uniformity, then pressure-laminating it to the panel skins.

R-value is defined as a measure of the capacity of a material, such as insulation, to resist heat flow, with increasing values indicating a greater capacity. The higher the R-value of a material, the greater its insulating capacity. Murus SIPs’ R-values range from R-16 to R-57, depending upon the type of foam core and its thickness.

Download Murus SIP technical drawings and details provided in PDF format.

View and download 3-part specs.

While factory CNC pre-cutting of your Murus SIP order has many time- and money-saving advantages, you can site-cut your panels if you so choose.