Compare Greenix SIP Systems: Polyurethane, EPS, with Wood and Steel Skin options
Looking for the best structural insulated panel (SIP) system for your next building project? Greenix Panels offers three high-performance SIP solutions—each designed to meet different needs for energy efficiency, strength, and cost. Whether you’re building a high-wind-rated structure, maximizing R-value, or seeking a cost-effective alternative, this side-by-side comparison chart will help you choose the right SIP system.
Explore the key differences between our OSB/PUR, OSB/EPS, and GX Steel SIP systems, including R-values, panel sizes, fire ratings, wind loads, ease of installation, and more.
| Feature | GP/W-PUR | GP/W-EPS | GX Steel Panel System |
|---|---|---|---|
| Panel Skins | OSB (7/16”) both sides | OSB (7/16”) both sides | 26-gauge galvanized embossed steel |
| Core Material | Polyurethane (PUR) Foam | Expanded Polystyrene (EPS) Foam | Polyurethane (PUR/ISO) Foam |
| Panel Width | 4 feet | 4 feet | 2 feet |
| Panel Length | Up to 24 feet | Up to 24 feet | Up to 50 feet (typical: 35–40 ft) |
| Spans (check snow loads) | Up to 12 feet | Up to 12 feet | Up to 16 feet |
| R-Values | 4.5″ = R-28, 6.5″ = R-40 | 4.5″–12″ = ~R-17.1–R-45.6 (~R-3.8/in) | 3″ = R-24, 4″ = R-28, 5″ = R-40 |
| Electrical | Conduit + boxes foamed in place | 1.5” chases only (no conduit), boxes cut and installed on-site | Interior walls furred out, surface mount or baseboard |
| Window & Door Openings | Pre-cut & framed | Pre-cut (splines installed onsite) | Cut onsite (due to 2′ width) |
| Angles & Cuts | All custom angles cut to fit | All custom angles cut to fit | Wrapped with bracing metal, on-site |
| Lumber / Accessories Included | Screws, adhesive, bottom/top plates, optional LVLs | Screws, adhesive, dimensional lumber, optional LVLs | Pre-bent 16-ga bracing metal, screws, adhesive |
| Cabinet / Ledger Attachments | Additional lumber can be added | Additional lumber can be added | Can attach directly at 20-ga members |
| Wind Load Rating | 90 MPH | 150 MPH | 155 MPH (Miami-Dade Approved) |
| Fire Rating | Class1 Type A Foam (1250 deg.) | Not specified | 1-hour assembly rating |
| Ease of Use | Easiest to install | Moderate (more work than PUR), splines installed on-site | Metal framing experience recommended |
| Weight | 6 lbs/sq ft average | 5.8 lbs/sq ft average | 3″ = 3.6 lbs/sq ft, 4″ = 4.4 lbs/ sq ft, 5″ = 5 lbs/sq ft |
| Best Use Cases | Residential walls & roofs | Budget builds; flexible chase placement | High wind/fire areas; infill panels |
| Price | Premium | Mid-range | Budget-friendly for large spans |
| Additional Notes | Production drawings included | Precut electrical chases as needed | Roll-formed, cost-effective vs OSB |