PU Panel: Complete Guide to PU Sandwich Panel Solutions in Bangladesh

A PU panel is an insulated sandwich panel made with a rigid polyurethane (PU) core placed between two protective metal sheets. Because of its combination of thermal insulation, structural strength, lightweight construction, and relatively fast installation, PU panels are widely used for cold rooms, cold storage facilities, factories, warehouses, food processing areas, pharmaceutical facilities, clean rooms, and industrial buildings.

At SA EPS Insulation & Packaging, we manufacture and supply PU sandwich panels based on project requirements. Our PU panel solutions can be customized in thickness, length, sheet material, and other specifications depending on the application. We manufacture PU panels using different outer sheet options, including PPGI, GI, MS, and SS, allowing customers to select a suitable configuration for their project.

This guide explains what a PU panel is, how it is manufactured, its construction, advantages, available specifications, applications, and the factors to consider when selecting PU sandwich panels.

What Is a PU Panel?

A PU panel, also called a PU sandwich panel, consists of three primary layers:

Outer metal sheet
Rigid polyurethane insulation core
Inner metal sheet

The polyurethane core provides thermal insulation, while the metal sheets protect the core and provide the panel with its finished surface and structural properties.

Unlike conventional wall construction, which can require multiple layers of brick, concrete, plaster, insulation, and finishing materials, a PU sandwich panel combines insulation and panel construction into one prefabricated product.

The panels can be manufactured according to the required thickness and dimensions, making them suitable for both wall and roof applications.

How PU Sandwich Panels Are Constructed

The performance of a PU panel depends on the quality and combination of its core and facing materials.

1. Polyurethane Core

The central layer is made from rigid polyurethane foam. This insulation core helps reduce heat transfer through the panel.

The thickness of the PU core can be selected according to the project’s insulation requirements. At SA EPS Insulation & Packaging, we provide customized PU panel thicknesses from 40 mm to 200 mm based on customer requirements.

For applications requiring greater thermal insulation, a thicker PU core can be selected.

2. Metal Sheet

The PU core is enclosed between two metal sheets. The sheet material can be selected according to the project’s environmental conditions, appearance requirements, durability requirements, and budget.

Available options include:

PPGI sheet
GI sheet
MS sheet
SS sheet

The use of different sheet materials makes PU sandwich panels suitable for a wide range of industrial and commercial applications.

3. Panel Surface

The external surface provides protection for the insulation core while also creating the finished appearance of the building or room.

Depending on the project, customers can select suitable sheet thickness, colour, surface finish, and panel dimensions.

PU Panel Manufacturing at SA EPS Insulation & Packaging

SA EPS Insulation & Packaging manufactures PU sandwich panels as part of its complete sandwich panel solution.

Our manufacturing approach focuses on producing panels according to the specifications required for each project rather than relying only on fixed standard dimensions.

Depending on the application, we can provide customized:

Panel thickness
Panel length
Panel width
Sheet material
Sheet thickness
Surface finish
Panel configuration

Our standard customization range for PU sandwich panels is 40 mm to 200 mm thickness.

For example, a customer requiring a 100 mm PU sandwich panel can specify the required sheet configuration and panel dimensions according to the project. For specialized applications, stainless steel sheets can also be used where the project requires a different surface material.

This customization is particularly important for cold storage, food processing, pharmaceutical, industrial, and other controlled-environment projects.

Key Advantages of PU Panels

Excellent Thermal Insulation

One of the main reasons PU panels are used in industrial and temperature-controlled facilities is their insulation performance.

The polyurethane core reduces heat transfer through walls and roofs. This makes PU sandwich panels suitable for applications where maintaining a controlled indoor temperature is important.

For cold rooms and cold storage facilities, properly designed insulated panels help reduce the amount of heat entering the enclosed space.

Suitable for Temperature-Controlled Facilities

PU panels are commonly used for cold rooms, freezers, chillers, and cold storage facilities because they provide an insulated enclosure around the temperature-controlled space.

The required panel thickness should be selected according to the intended operating temperature, room size, refrigeration system, and overall project design.

Faster Installation

PU sandwich panels are prefabricated before reaching the installation site. This allows wall and roof systems to be assembled significantly faster than many traditional construction methods.

Faster installation can reduce construction time and allow industrial or commercial facilities to become operational sooner.

Lightweight Construction

Compared with many conventional wall construction systems, sandwich panels offer a lightweight alternative while still providing insulation and a finished wall surface.

The lower structural load can be an important consideration when designing industrial buildings, warehouses, temporary facilities, and other structures.

Clean and Professional Finish

PU panels provide a finished surface after installation, reducing the need for additional wall-finishing processes.

This makes them suitable for factories, warehouses, commercial facilities, clean areas, cold rooms, and other locations where a neat and uniform interior is required.

Customizable Construction

Different projects have different requirements. A cold room, factory partition, food processing area, and industrial warehouse may not require the same panel configuration.

With customized PU sandwich panels, customers can select appropriate thicknesses, dimensions, and facing materials for their applications.

PU Panel Thickness Options

Choosing the correct thickness is one of the most important considerations when ordering PU panels.

SA EPS Insulation & Packaging provides PU sandwich panels from 40 mm to 200 mm thickness.

Common considerations include:

PU Panel Thickness	Typical Consideration
40–50 mm	Internal partitions and selected insulation applications
60–80 mm	Industrial and commercial insulated areas
100 mm	Higher insulation requirements and various controlled environments
120–150 mm	Cold storage and stronger thermal insulation requirements
160–200 mm	Applications requiring higher insulation levels

These are general application considerations rather than fixed rules. The appropriate thickness should be determined based on the project’s temperature requirements, room dimensions, environmental conditions, refrigeration system, and building design.

Metal Sheet Options for PU Panels

The facing sheet is another important part of the PU sandwich panel.

PPGI Sheet

PPGI, or pre-painted galvanized iron/steel sheet, is widely used where customers require a finished coloured surface along with corrosion protection.

PPGI is suitable for many industrial, commercial, and warehouse applications.

GI Sheet

Galvanized iron/steel sheets provide a zinc-coated surface designed to improve resistance against corrosion compared with untreated steel.

GI-faced PU panels can be used in various industrial and construction applications.

MS Sheet

Mild steel sheets can also be selected for specific project requirements.

MS sheet configurations may be considered where the project has particular structural or fabrication requirements.

SS Sheet

Stainless steel sheets can be used for specialized applications where the project requires a stainless-steel surface.

This option can be particularly relevant to certain food-processing, pharmaceutical, laboratory, or hygiene-sensitive environments, depending on the complete project specification.

Applications of PU Sandwich Panels

PU panels can be used in many industries and building environments.

Cold Storage

Cold storage facilities require properly insulated walls and ceilings to help maintain the required internal temperature.

PU sandwich panels can form the insulated enclosure for cold rooms and cold storage facilities.

SA EPS Insulation & Packaging also provides solutions for different cold storage requirements, with panel thickness and construction selected according to project specifications.

Cold Rooms

Cold rooms are used for storing vegetables, fruits, meat, fish, dairy products, pharmaceuticals, flowers, and other temperature-sensitive products.

PU panels can be used for the walls and ceilings of these rooms to create an insulated environment.

Food Processing Facilities

Food processing areas often require controlled environments and easy-to-maintain surfaces.

PU sandwich panels can be used for internal walls, partitions, ceilings, and temperature-controlled rooms depending on the facility’s requirements.

Pharmaceutical Facilities

Pharmaceutical production and storage environments can require controlled temperature and cleanable surfaces.

PU panels can be incorporated into suitable controlled rooms and partitions based on the project’s technical requirements.

Factories and Industrial Buildings

PU sandwich panels can be used for factory walls, partitions, production areas, and selected roofing applications.

Their prefabricated construction makes them practical for projects where installation speed and thermal insulation are important.

Warehouses

Warehouses can use insulated sandwich panels for walls and partitions where temperature control or improved thermal performance is required.

Clean and Controlled Rooms

PU panels can be used for clean rooms, QC rooms, laboratory areas, and other controlled environments when the appropriate panel and jointing specifications are selected.

Commercial and Other Applications

Depending on the design, PU panels can also be used in offices, workshops, site facilities, commercial spaces, and specialized enclosures requiring insulation.

PU Panel for Cold Storage Projects

Cold storage is one of the most important applications of PU sandwich panels.

A cold storage building needs an insulated envelope to reduce unwanted heat transfer. If the walls and ceiling have insufficient insulation, the refrigeration system may need to operate for longer periods to maintain the target temperature.

A PU panel system helps create the insulated barrier around the storage area.

However, panel thickness alone does not determine the performance of a cold storage facility. Proper design should also consider:

Required operating temperature
Room dimensions
Product load
Door opening frequency
Refrigeration capacity
Floor insulation
Panel joints
Vapour control
Installation quality
Ambient temperature

Therefore, PU panels should be selected as part of the complete cold storage design rather than as an isolated product.

PU Panel vs Traditional Construction

Traditional brick-and-mortar construction can require separate processes for wall construction, insulation, plastering, and finishing.

PU sandwich panels combine the structural facing and insulation into a prefabricated system.

This can provide several practical advantages:

Faster installation
Integrated insulation
Reduced construction complexity
Clean finished surface
Lower installation time
Easy customization
Suitable for industrial applications

For projects where thermal insulation and rapid construction are priorities, PU sandwich panels can be a practical alternative to conventional wall systems.

How to Choose the Right PU Panel

Before ordering a PU panel, consider the following factors.

Determine the Application

First identify whether the panels will be used for a cold room, cold storage, factory, warehouse, partition, food-processing facility, or another application.

Select the Required Thickness

The required insulation level should determine the panel thickness. A project with a higher insulation requirement may need a thicker PU core.

Choose the Facing Material

Select between PPGI, GI, MS, or SS depending on the project’s environmental and operational requirements.

Confirm Panel Dimensions

Panel length and width should be determined according to the building design and installation requirements.

Consider the Installation Environment

Humidity, temperature, exposure to chemicals, cleaning requirements, and indoor operating conditions can influence the suitable panel configuration.

Work With the Manufacturer

A panel manufacturer can help determine a suitable configuration based on the project’s requirements, drawings, room conditions, and intended use.

Why Choose SA EPS Insulation & Packaging for PU Panels?

SA EPS Insulation & Packaging is a Bangladesh-based manufacturer and supplier of insulated sandwich panel solutions.

We manufacture PU sandwich panels according to customer requirements and provide customized solutions for different industrial and commercial applications.

Our PU panel range includes:

40–200 mm thickness
PPGI sheet options
GI sheet options
MS sheet options
SS sheet options
Custom panel sizes
Wall and roof applications
Project-specific configurations

Our products are supplied for applications including cold storage, cold rooms, factories, warehouses, food-processing facilities, controlled rooms, partitions, and other insulated structures.

As a manufacturer, we focus on providing the required panel configuration rather than treating every project as the same. Customers can discuss their required thickness, dimensions, sheet material, application, and project specifications with our team before production.

Final Thoughts

A PU panel is a practical insulated construction solution for projects where thermal insulation, fast installation, lightweight construction, and a finished surface are important.

PU sandwich panels consist of a polyurethane insulation core enclosed between metal sheets. By selecting the appropriate core thickness and facing material, the panels can be configured for applications ranging from industrial partitions and warehouses to cold rooms and cold storage facilities.

At SA EPS Insulation & Packaging, we manufacture PU sandwich panels from 40 mm to 200 mm thickness and offer customization using PPGI, GI, MS, and SS sheets according to project requirements.

Whether you are planning a cold storage facility, factory, warehouse, food-processing area, controlled room, or another insulated structure, selecting the correct PU panel specification is essential for achieving the required performance.

Contact SA EPS Insulation & Packaging to discuss your project requirements and get a suitable PU sandwich panel solution for your application.