We provide and install Structural Insulated Panels (SIPs). Whether you are looking into construction of a new home, a commercial building or a vacation home, or simply looking to add on, our Insulspan Structural Insulated Panels (SIPs) is the ultimate in construction methods. Replacing traditional stick built construction, SIPs are easy to work with and versatile for exterior walls, roofs, floors and additions. The SIP’s are composed of a continuous core of rigid foam insulation, which is laminated between two layers of structural board bonded together to form a single solid panel. They are then prefabricated inside a controlled environment following specific blueprints and architectural plans. The advantages of such a system are extensive:

Extreme Structures LLC also specializes in foundations using Insulated Concrete Forms (ICFs). Using ICF’s create a warm, dry and solid foundation to build on. They offer several of the benefits listed above for the SIPs. In addition, ICF’s have been shown to be effective in resisting natural disasters, such as tornadoes, fire, hurricanes and earthquakes.

Together, Structural Insulated Panels and Insulated Concrete Forms provide an unbeatable combination in construction methods. Whatever your needs might be, let Extreme Structures LLC help provide you with a safe, energy efficient and value-driven building. At home, at work, at play, since 1995 Extreme Structures LLC has been there to lead the way.

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What Our Customers Have To Say

Living in an Insulspan SIP home on Lake Winnebago has exceeded our greatest expectations. Extreme Structures LLC, the Insulspan contractor used Insulspan Structural Insulated Panels (SIPs) to design and create the home of our dreams. Value and quality were obtained with no costly architect required. The precut panels were erected in minimal time to our great satisfaction. Timber frame construction along with the panels allowed for an open floor plan. The vaulted ceilings accommodate a 21 foot stone fireplace to create a dramatic living area. Insulspan offered unique architectural features at reasonable construction costs. The energy efficient SIPs and ICFs along with an effective heating and cooling system maintained even heat and cooling throughout the entire home. This allowed the use of more square footage for living space. The 6,000 square foot home includes a lower level, with another large stone fireplace and the area above the 2,000 square foot heated garage which includes three overized bedrooms and a generous bathroom. The coziness and beauty of our home represents an architecturally unique home. People dream of exotic vacations, we dream of staying home and enjoying our SIP lake home.

-Tom and Cathy


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