C-SIS Sheathing

5-in-1CPBS’ multi-tasking Composite Structural Insulated Sheathing (C-SIS) is a fast and easy way to achieve exterior walls with high energy savings, low air infiltration and virtually eliminate thermal bridging across exterior wall surfaces. C-SIS Sheathing was designed to address all the weaknesses of built up, multi-layered, labor intensive and low performance exterior wall building products and will perform equally well on existing walls for retrofits or new construction building projects.

Our premier 1-1/8″ and 2-1/8″ C-SIS insulated sheathing offers a smarter alternative to conventional plywood or OSB sheathing over wood or metal studs.  C-SIS utilizes an improved method for braced wall construction that significantly adds to wind-loading capabilities by fastening to the top plate framing member. C- SIS Sheathing may be applied with a standard drywall screw gun on either metal studs or wood framing. They go up quickly and can be easily field cut to adapt to various shapes and angles. Finishing is simple — for siding, just screw siding through the sheathing to the studs. A stucco finish, such as Stuc-O-Flex elastomeric stucco, can be applied directly to the sheathing’s composite skin.

C-SIS Sheathing is manufactured with an innovative composite fiberglass reinforced thermoset (FRT) polymer skin and moisture resistant, rigid polyurethane foam insulation that has excellent compressive strength and long term, stable R-values. This revolutionary sheathing not only delivers superior insulation performance but multitasks by providing enhanced structural performance, a Grade-A water barrier, a vapor retarder and an air barrier. C-SIS Sheathing is manufactured without adhesives joining the skin to the insulation. The FRT skin is bonded by a chemical reaction to the foam insulation during manufacturing, eliminating the risk of delamination.

The 1-1/8″ thick sheathing provides a nominal insulating value of R-6, which when added to a traditionally framed 2 x 4 wall with R-15 batt insulation, achieves an R-21 wall without the added expense of 6″ stud framing. The 2-1/8″ C-SIS sheathing provides an increased insulating value of R-12, so when coupled with conventional framing and insulation, it is easy to achieve an R-27 wall. CPBS’ C-SIS Sheathing is the most effective and easiest way to dramatically increase the performance benefits of your building envelope, measurably reduce air conditioning costs and improve indoor air quality year round.

Available sizes in both 1-1/8” and 2-1/8” widths:  4′ x  8′-1”, 4′ x  9’-1” and 4’ x 10’-1”

To confirm the compatibility of CPBS’ products system design with your building project, we advise architects, engineers or specifiers to contact CPBS during the preliminary design phase. CPBS custom makes sheathing specific to each project and so requires a minimum 30 day lead time for the manufacturing production in order to ensure clients receive custom orders on schedule.