What are SIPs?

Structural insulated panels (SIPs) are high-performance, prefabricated building systems designed to enhance durability, energy efficiency, and indoor comfort. Each panel consists of an insulating foam core sandwiched between two engineered boards, creating a lightweight yet exceptionally strong material that forms an airtight, weather-resistant seal. At DC Structures, we incorporate SIPs into our wood homes and structures to optimize thermal performance and meet strict energy efficiency standards. Whether you’re envisioning a stunning timber home, a winery, a venue, or another custom structure, our team can help you design a highly durable, sustainable solution tailored to your property.

Stack of three layered construction panels with wood-textured surfaces and a white insulating core. The panels are slightly staggered, showcasing their thickness and composition.

How Are SIPs Made?

Structural insulated panels (SIPs) are made by bonding an insulating foam core between two engineered wood or fiber cement boards. Visually, SIPs are said to resemble an ice cream sandwich, with the insulation forming the core and the boards creating a rigid, protective shell. Manufacturers typically begin with the insulating core, which can vary from expanded polystyrene (EPS) to more energy-efficient options like high-performance graphite polystyrene (GPS). From there, the outer layers may consist of oriented strand board (OSB), plywood, gypsum, or fiber cement, depending on the project’s needs. Once bonded with structural-grade adhesives and compressed, SIPs become durable, airtight panels that can be custom-cut to any shape or size.

Construction workers install a large panel on a roof using a crane on a snowy day. The roof is covered with insulation material. Two men are guiding the panel into place. The landscape shows snow-covered hills in the background.
A construction worker in winter attire installs insulated panels on a snowy rooftop. The background features snow-covered trees and hills. A crane is lifting a panel in the distance. The scene conveys a cold-weather construction project.

Where Are They Used?

SIPs are widely used in residential, commercial, and industrial buildings, including single-family homes, retail spaces, schools, and warehouses. Their exceptional energy efficiency makes them particularly popular in regions with strict building codes, where high insulation and airtightness standards need to be met.

Because SIPs have lower embodied carbon than alternatives like steel, concrete, and masonry, they are an ideal choice for projects requiring high R-values—delivering superior insulation and reduced energy consumption. Their airtight construction also provides optimal thermal performance, making SIPs a smart, sustainable solution for colder climates and energy-conscious builds.

Why Choose SIPs for Your Project?

Whether you’re building a timber frame home, commercial venue, event space, or backyard ADU, SIPs provide a versatile, high-performance solution for both primary and secondary structures. From enhanced energy efficiency to ease of installation, here’s why property owners across the country are choosing to incorporate SIPs in their builds →

Spacious open-plan living room and kitchen with wooden floors, a large rug, and modern furniture. The kitchen features a black island with bar stools and pendant lights. Large windows allow natural light, and a dining table is set for six.

Superior Energy Performance

SIPs are 40% to 60% more energy-efficient than traditional stick-framing methods, thanks to their superior airtightness and thermal performance. Their high insulation values help meet strict energy standards across the U.S., creating a comfortable indoor environment you can enjoy year-round.

Workers installing a large prefabricated insulated panel on a roof with a snowy landscape in the background. The panel is being lifted by a crane, and the construction area is covered with protective material.

Precision-Cut & Prefab-Ready

SIPs are pre-cut, pre-insulated, and prefabricated for streamlined, hassle-free assembly. Like our precision-cut timbers, SIPs can be customized to match any design, ensuring accuracy and consistency. Their lightweight nature makes handling and installation faster and more efficient, reducing labor time on-site.

Extreme Weather & Seismic Strength

Engineered for extreme weather and seismic resilience, SIPs provide superior protection against high winds, heavy snow, and earthquakes. When combined with our framing lumber, they create an airtight, high-performance building envelope built to withstand even the toughest climates.

A modern two-story house with wooden accents surrounded by a forest. The house has a balcony and three garage doors. The trees display vibrant autumn colors. The sky is overcast, and fallen leaves decorate the gravel driveway.

Sustainable & Waste-Reducing

SIPs are a sustainable building solution, made from recyclable materials like oriented strand board (OSB) and expanded polystyrene (EPS). The SIP fabrication process also helps reduce excess material waste, with SIP installation cutting on-site waste by an average of 30%.