Builders > Features & Benefits > PUR Features & Benefits

PUR Features

Polyurethane SIPs
Murus Polyurethane (PUR) Structural Insulated Panels (SIPs) are composed of a rigid Polyurethane foam core that is formed between two sheets of rated OSB (Oriented Strand Board). Murus SIPs provide structural strength that is equal or superior to conventional 2x stud construction of a comparable thickness. The Polyurethane foam core provides a solid, uninterrupted, highly energy efficient insulation. Once the SIP seams are sealed with spray foam and cam-locked tightly together, Murus SIPs provide a uniform continuity of structure, insulation, and interior and exterior substrate, all in one building component.

Patented Cam-Lock System
Murus' patented, high impact plastic Cam-Lock joining system speeds assembly and saves substantially on installation time as compared to other SIP systems, and can offer even greater time savings over conventional stud wall construction. Cam-Locks aid in achieving a uniform positive seal between panels, helping to eliminate possible moisture and air infiltration. Cam-Locks are located at two foot intervals along the vertical edge of the panel, and in conjunction with the tongue and groove profile of the foam core, create an exceptionally strong, superior building envelope. 

Tongue and Groove Edge Profile
A tongue and groove edge profile is molded into every Murus Polyurethane SIP, assuring quick, proper alignment of panel-to-panel joints. Once installed and sealed with spray foam, the tongue and groove connection provides a continuous uniformity of insulation that is lacking in spline connection SIP systems.

Superior Structural Strength
Murus Polyurethane SIPs provide a continuous whole-wall system that is superior in structural strength to conventional construction methods.

Electrical Chase
A standard electrical chase is embedded horizontally in the foam core of the Murus Polyurethane SIP during manufacturing. Three standard chase height options are available. Additional chase heights can be added; for example, a dedicated chase for countertop receptacle switches or communication wiring.

Optional Factory Pre-cutting

Murus offers state-of-the-art precision factory CNC pre-cutting services. Whole wall or roof sections are pre-assembled. Then we pre-cut window and door openings, adjust the overall panel lengths, and rout the panel foam cores to accommodate inlet plates and nailers. The panels are then disassembled and labeled to correspond with pre-cut drawings (included) for on-site assembly and installation. This service can save time and labor, and will cut on-site waste volume and waste disposal expense.

PUR Benefits

Superior Insulating Value for Energy Savings
With superior R-values per inch of thickness and consistent insulation through composite construction, a Murus Polyurethane SIP building envelope will offer significant savings on both heating and cooling energy, and perform better than other building systems that are plagued by air infiltration and thermal bridging and breaks. And, because Murus SIPs are so highly energy efficient, smaller-sized heating and cooling equipment may be installed for further savings.

Green Building Qualified
Because of their ability to significantly reduce heating and cooling loads, Murus SIPs lessen the consumption of fossil fuels, saving our limited resources and minimizing combustion emissions into the atmosphere. Murus SIPs are ideal for Green building projects as recognized by and listed in the Greenspec Directory, an independent agency specializing in qualifying Green construction products.

Total Living Comfort
Air infiltration creates drafts and air stratification (cold floors and hot ceilings). These conditions rob energy and create an uncomfortable living environment. Because of their solid core construction, Murus SIPs virtually eliminate air infiltration and stratification. A home enclosed with Murus SIPS will be significantly more airtight than typical enclosure systems, and will have a uniformly balanced, delightfully comfortable interior living environment.

Job-Specific Manufacturing
Murus realizes that every home is unique, so we manufacture every panel to specifications as provided in the project's architectural drawings.

Fast Installation
The composite construction of Murus SIPs ensures faster shell-in times. 

Builder Tax Credits

Home builders may be eligible for a $2,000 tax credit for a new energy efficient home that achieves 50 percent energy savings for heating and cooling over the 2004 IECC and supplements. At least 1/5th of the energy savings must come from building energy improvements.  To learn more, go to: Tax Credits for Home Builders

Client Mortgage Loan Advantage
Several banks and mortgage loan institutions have realized the positive contribution SIPs bring to a new home project, and have developed tailored mortgage loan programs just for system-built projects. 

Fire Resistance
The foam used in Murus SIPS holds a Class 1 Fire Resistance rating - the highest rating available for combustible materials. Because the core of a Murus SIP is solid, there is no air cavity in a SIP wall or roof to permit a "chimney effect." A chimney effect promotes and hastens fire spread, and is inherent with open cavity enclosure systems such as stick framing.