EPS Sandwich Panels: Economical, Lightweight Roof & Wall Systems
EPS (Expanded Polystyrene) sandwich panels offer the most economical and lightweight building envelope solution in modern industrial construction. Imposing minimal dead load (only 9.5 – 12 kg/m²) on primary steel structures, EPS panels cut structural steel tonnage requirements while eliminating crane dependency with effortless manual handling. Engineered for fast-track site mobilization, prefabricated office/accommodation containers, agricultural sheds, dry storage warehouses and interior partition walls, they deliver unmatched cost-to-performance efficiency with continuous custom cut lengths.
* All prices EXW Factory excluding VAT.
Key Engineering & Commercial Benefits
35% – 45% Budget Advantage
Lowest cost per square meter compared to PUR and mineral wool, preserving capital on large-scale infrastructure projects.
Ultra-Light Dead Load (9.5–12 kg/m²)
Halves envelope dead weight on structural frames, allowing lighter foundation and purlin steel sections.
Crane-Free Fast Manual Assembly
Lightweight modules assemble swiftly by 2 installers without costly mobile crane rentals on remote jobsites.
Flame-Retardant B1/E Additive Core
Self-extinguishing modified polystyrene beads prevent flame propagation once the ignition source is removed.
Available Systems & Models
Select the optimal profile and core configuration for your building envelope requirements.
EPS panels deliver the most economical insulation alternative for light industrial roofs, modular containers and prefab structures without compromising basic weather protection.
The 5-rib profile enhances panel moment of inertia, enabling wider purlin spacings up to 2.20 meters while retaining the superior cost benefits of EPS insulation.
EPS wall sandwich panels offer the most budget-friendly envelope solution for modular container camps, temporary construction offices, partition walls, and prefabricated housing.
Purpose-built for the container manufacturing and modular construction sectors, offering swift manual handling without crane dependency and excellent thermal-to-cost ratio.
Insulation Core & Performance Comparison
Compare lambda thermal conductivities, fire ratings, densities and ideal project usages.
| Model & System | Application | Profile / Rib | Density | Thermal Cond. (λ) | Key Advantage |
|---|---|---|---|---|---|
| SP-ROOF-EPS (Ekonomik Çatı) | Sanayi ve Şantiye Çatısı | 3 Hadveli Standart Tepe | 16 kg/m³ | 0.035 W/mK | Light steel canopies, site mess halls, open shelters and workshops |
| SP-ROOF-EPS5 (Mukavemetli Çatı) | Geniş Aşıklı Sanayi Çatısı | 5 Hadveli Güçlendirilmiş | 16 – 20 kg/m³ | 0.035 W/mK | Wide purlin spans (up to 2.00m), heavy snow loads and budget roofs |
| SP-WALL-EPS (Dış Cephe) | Bina Dış Cephe Kaplaması | Standart Vidalı Geçmeli | 16 kg/m³ | 0.035 W/mK | Warehouse envelopes, logistics sheds and agricultural storage |
| SP-MODULAR-EPS (Konteyner Paneli) | Modüler Kabin & Konteyner | Düz / Mikro Hadveli Yüzey | 18 – 20 kg/m³ Blok EPS | 0.033 W/mK | Site office containers, living pods and interior drywall partitions |
| EPS vs PUR vs Taşyünü | 3 Dolgu Tipi Kıyaslaması | E / B1 Yangın Tepkisi | 16-20 kg/m³ | 0.035 W/mK | 40% more economical than PUR and Rockwool, 10 kg/m² ultra-light |
Thickness, U-Value, Weight & Logistics Matrix
Verify thermal resistance (R), permissible purlin spans and truckload volume per thickness.
| Thickness | Thermal Resistance (R) | Thermal Transmittance (U) | Dead Weight | Rec. Purlin Span | Truckload Capacity |
|---|---|---|---|---|---|
| 40 mm | 1.14 m²K/W | 0.88 W/m²K | 9.80 kg/m² | 1.50 metre | ≈ 1.400 m² / Tır |
| 50 mm | 1.43 m²K/W | 0.70 W/m²K | 10.40 kg/m² | 1.80 metre | ≈ 1.200 m² / Tır |
| 60 mm | 1.71 m²K/W | 0.58 W/m²K | 11.00 kg/m² | 2.00 metre | ≈ 1.050 m² / Tır |
| 80 mm | 2.29 m²K/W | 0.44 W/m²K | 12.20 kg/m² | 2.20 metre | ≈ 850 m² / Tır |
| 100 mm | 2.86 m²K/W | 0.35 W/m²K | 13.40 kg/m² | 2.50 metre | ≈ 700 m² / Tır |
| 120 mm | 3.43 m²K/W | 0.29 W/m²K | 14.60 kg/m² | 2.70 metre | ≈ 580 m² / Tır |
Critical Engineering Guidelines for System Selection
Standards for purlin spacing, live loads, fire containment and joint detailing.
1. Density Grades (16 kg/m³ vs 20 kg/m³) & Compressive Strength
Standard EPS sandwich panels feature 16 kg/m³ density, providing 100 kPa compressive resistance ideal for site camps. For heavy snow loads or high-traffic container flooring, 20 kg/m³ high-density block EPS is specified, lowering lambda to 0.033 W/mK.
2. Dead-Load Reduction & Structural Steel Cost Savings
Weighing only 9.8 – 11.0 kg/m², EPS panels cut cladding dead load in half compared to rockwool (20-24 kg/m²). This enables downsized steel columns, truss sections and purlin gauges, saving 15% to 25% on overall structural steel tonnage.
3. Climatic Zones & Thickness Selection per Thermal Codes
Under thermal engineering standards, 40-50mm EPS suffices for temperate coastal zones (Zone 1). Moderate continental zones (Zone 2 & 3) require 50-80mm, while cold continental environments (Zone 4) require 80-100mm to prevent dew point condensation.
4. Site Mobilization, Modular Container & Drywall Assembly
On remote mining and infrastructure jobsites, EPS panels slide into base galvanized U-channels rapidly by hand without mobile crane fees. At project completion, panels can be disassembled and re-erected at new project sites without material degradation.
5. Fire Performance (B1 Flame-Retardant) & Code Boundaries
EPS cores utilize flame-retardant additives classified Class E (optional B1 flame-retardant) under EN 13501-1, self-extinguishing when fire sources are removed. However, for transformer rooms or 120-min firewall compartments, A1 Rockwool must be specified.
6. Trailer & 40ft HC Container Logistics Optimization
Due to low dead weight, road transports reach full volume capacity before hitting weight limits (26 tons). A standard 13.60m trailer carries up to 1,400 m² of 40mm or 1,200 m² of 50mm EPS panels, driving down freight costs per square meter.
Matching Flashings, Screws & Trims Package
Coordinated single-delivery guarantee: Color-matched flashings, EPDM fasteners, and covings.
Base Galvanized U-Channel
Provides plumb alignment and structural seat for modular wall and container panels.
3 & 5 Rib Top Ridge Cap
Seals roof apex against storm-driven rain and lateral wind suction.
Corner Angle & Eave Drip Trims
Protects wall corners and roof eaves from water ingress and impact.
Self-Drilling Screws with EPDM Washer
Watertight fastening directly into light gauge purlins and timber frames.
Joint Sealant & Polyurethane Mastic
Seals tongue-and-groove joints and sheet seams against moisture and dust.
Corrugated Eaves Foam Fillers
Contours to roof profile to block pest intrusion, wind and blowing sand.
Panel Quantity & Logistics Calculator
Roof & Wall Sandwich Panel Quantity & Logistics Calculator
Define your building dimensions and scope (Roof, Wall or Complete Envelope) to estimate net surface area, tonnage, logistics and budget.
Frequently Asked Technical Questions
Detailed engineering answers on pricing, fire codes, installation spans and delivery.
Why are EPS sandwich panels significantly more economical than PUR and Rockwool?
Do EPS sandwich panels absorb water or deteriorate in humid environments?
Where can EPS panels be safely specified according to fire regulations?
What is the optimal EPS panel thickness for site containers and modular cabins?
How many square meters of EPS sandwich panels fit in a standard truckload?
What steel gauges and color coatings are available for EPS panels?
What are the required roof pitch and purlin spacings for EPS roof panels?
How can custom continuous cut lengths be ordered without waste?
Ready to Receive a Factory-Direct Project Quotation?
Share your project drawings or quantity takeoffs; our engineering team will provide a comprehensive commercial offer within 2 hours.