SIP’s Panels 2019-03-20T15:43:21+00:00



EPS Structural Insulated Panels (SIPs) are proven efficient

Watch the hosts of Hometime talk about EPS SIPs:

Introduction to home construction using EPS:

What makes up a  SIPs Panel:

Building with SIPs Panels:

The Oak Ridge study discovered that structural insulated panels perform at about 97% of their stated R-value overall, losing only 3% to seams, splines and nail holes.

SIP 4A study implemented by ORNL (Oak Ridge National Labs), has demonstrated that a 4-inch SIP panel outperforms 2″x4″ stick and batt construction. Not only that, it even outperforms 2″x6″ construction when comparing thermal performance. A SIP panel provides the structural components. There are no braces or studs to cause openings in the insulation. This results in a more comfortable, energy efficient building that performs up to specifications in real world conditions.

Commonly, stick and batt insulated buildings are subject to inadequately installed or even missing insulation. The design of a SIPs panel combines the structural and insulation components joined as one. This means there are no hidden spaces because a solid layer of foam insulation is part of the wall or roof panel.

In additional testing and a comprehensive technical analysis of whole-wall performance indicates that the air losses in stud wall construction are much greater than originally anticipated. Average results showed that the other standard components in stick and batt walls can reduce R-values as much as 30% of the wall area.

The Oak Ridge study discovered that structural insulated panels perform at about 97% of their stated R-value overall, losing only 3% to seams, splines and nail holes. Chases for electrical wiring are preformed into the foam core which provides a continuous layer of insulation. This technology keeps the outdoor elements out and means the interior will be free of drafts and cold spots.

When it comes to maintaining constant interior temperatures, a SIP panel wall also outdoes stick and batt construction which leads to improved occupant comfort. The accompanying chart demonstrates how this works. The interior wall temperature of frame construction drops at every stud location. However, the SIP wall remains consistent across its entire surface. Occupant comfort is improved because there are no changes to the temperature – every part of the building is consistent and comfortable. That is why many people remark that they can immediately “feel the difference” in a SIP panel built home or commercial building.

ALL our SIPS homes are considered LEVEL 3 efficiency homes (with Level 4 considered “off the grid”)


Building with Structural Insulated Panels allows you to incorporate your unique style. From custom kitchens, vaulted ceilings, to beautiful open rooms. Here, decorative glue-laminated beams provide a rustic, open look and feel.

custom energy efficient home interior by Ultimate Construction


With people spending 90% of their time indoors, buildings should create a safe environment for occupants, free from mold, volatile organic compounds (VOCs) or other harmful airborne pollutants. A SIP home allows for better control over the indoor air quality because the airtight building envelope limits incoming air to controlled ventilation. Controlled ventilation filters out contaminants and allergens and allows for incoming air to be dehumidified, reducing the possibility of mold growth.


An EPS home built with Structural Insulated Panels will provide plenty of options for exterior finishes. Go with traditional wood or vinyl siding or choose brick and stone finishes. Exterior finishes provide not only a decorative look, but the weatherproofing for the life of the home. Our professional builders will be happy to discuss the benefits of each option.