Homes & Buildings / 03
An efficient building envelope starts with coordinated design. Explore SIP home kits and custom structural insulated panel packages for your home, cabin, or residential space with Big Twig and EPS.
EPS Building Systems
Manufacturer expertise. Personal package guidance from Big Twig.
Understand the system
EPS SIPs combine an expanded-polystyrene insulating core with structural wood facings. Factory manufacturing brings framing, sheathing, and insulation together in a panel. The specified assembly and its connections determine how the package works as a system.
Panels, openings, connections, and handling requirements are coordinated during design. Wall and roof arrangements vary by project. Your written package quote and project engineering define what is supplied.
SIP education
Coordinate panel layouts, openings, connections, and the structural design before manufacturing. SIPA design guidance notes that performance depends on more than a stated R-value and includes coordination topics such as HVAC systems and shop drawings.
A tight building envelope needs planned mechanical ventilation. Your HVAC professional should size equipment using the actual home design, climate, and envelope performance.
Plan access, unloading equipment, dry storage, foundation accuracy, and the assembly sequence with your builder. Follow the specified connections and sealing details.
Coordinate services during design. Electrical chases and trade routes need planning; avoid unapproved cuts to structural panels.
Structural panels work as a system. Support conditions, splines, fasteners, sealants, and roof support details must follow the engineered package and manufacturer instructions.
A well-detailed SIP envelope can help limit uncontrolled air movement. Mechanical ventilation, moisture management, and the selected windows and equipment remain part of the whole-home design.
General education informed by the Structural Insulated Panel Association’s SIP overview, SIPA design guidance, and SIPA builder education. Manufacturer information: EPS SIP information. General education does not replace EPS instructions or project engineering, and does not imply association membership or endorsement.
Know what you’re buying
Material packages, design assistance, technical support, and delivery coordination. Your written quote defines the materials, design fees, engineering, and delivery scope for your project.
On-Time Package Delivery
Construction and its schedule, including site work, foundation, assembly, trade coordination, and completion. Review labor, permits, mechanical systems, and finishes separately from the material-package quote.
SIP home inspiration
Photographs from EPS residential single-family projects. Confirm the wall and roof assembly, openings, and quoted package for your home; pictured finishes and construction are manufacturer inspiration.
EPS building applications may use different structural systems. Explore commercial buildings, horse barns, multi-family packages, or the EPS Buildings hub to discuss your use and the appropriate quoted assembly.
FAQ
A SIP home kit or package uses factory-made structural insulated panels for the walls and often the roof. EPS SIPs combine an insulating core with structural wood facings. Your Big Twig quote lists the actual panels, openings, connections, engineering, and delivery for the home you are designing.
Yes. You can start with an EPS plan or a custom layout. Custom SIP design is billable. Confirm design fees, engineering responsibilities, revisions, and the selected wall and roof assemblies before authorizing work.
Customers select and hire their own builder. Big Twig supplies the material package, design guidance, technical support, and delivery coordination. Your builder manages site work, installation, trades, and the construction schedule.
A tight building envelope needs planned mechanical ventilation. Your HVAC professional should size equipment using the actual home design, climate, and envelope. We do not quote a universal utility-bill saving.
No. Residential SIP homes and other EPS building applications can use different structural systems. A shop, barn, or commercial building is not automatically the same SIP assembly as a house. Explore the EPS Buildings hub for non-residential uses.
A clear next step
Tell us about your site, your ideas, and where you are in the process. We’ll help you understand the package, design scope, and delivery. Your builder manages construction.
