Do you know using wall sandwich panels reduces the cost of modular construction materials by over 45%? Well, this is the reason importing modular houses from China is a thriving business.
As a matter of fact, this has been attributed to the availability of the economical version of wall sandwich panels. But this does not mean these sandwich panels are low quality.
In this article, we will give you detailed insights into these wall sandwich panels.
What Is a Wall Sandwich Panel?
A wall sandwich panel is a pre-fabricated construction material comprised of a solid insulating core that includes polyurethane (PU), polyisocyanurate (PIR), or expanded polystyrene (EPS).
Usually, these core materials are sandwiched between two sheets of metal. That is, the two outer metal sheets are typically galvanized steel or aluminum which are attached to an insulated core material.
Now, the economical version of wall sandwich panels mainly refers to the standard grade or budget friendly options. These budget friendly wall sandwich panels guarantee cost-efficiency, and not superior esthetics.
Therefore, during the production process, manufacturers may use low density PIR/PU or standard EPS. Additionally, the metal thickness may be smaller, with standard coating instead of PVDF.
Common Core Materials Used in Economical Panels
1. EPS (Expanded Polystyrene)
The most widely used core material in economical wall sandwich panels is EPS. It provides simple thermal insulation at a very low price.
This core material for sandwich panels is popular for its lightweight which reduces transportation and installation costs.
EPS panels can be used in projects where cost control is essential and fire performance needs are average. EPS, however, is less resistant to fire than PU or PIR cores. It is most applicable to warehouses, workshops, and temporary buildings.
2. PU (Polyurethane) – Standard Grade
Standard-grade PU cores have higher insulation performance compared to EPS and are relatively cheap. Thinner panels give you better thermal performance, enabling you to reduce the thickness of the walls and the space of the building.
PU panels are also extensively applied in industrial buildings and cold storage auxiliary space. Although premium PU formulations are better at providing higher fire ratings, standard grade PU aims at a balance between insulation and affordability. This makes it a favorite choice of economical panel systems.
3. PIR Light Panel (Entry-Level Options)
Entry level PIR light panels have better fire performance than both EPS and standard PU. It offers superior fire resistance properties and thermal stability within a reasonable budget.
These economical version of wall sandwich wall panels are intended to be used in projects that need better safety compliance without transferring to the full premium systems. PIR light panels are commonly used in logistics centers, light-industrial buildings, and in those commercial premises that have more stringent fire rules.
4. Thin-Gauge Steel Panels
Thinner steel facings are commonly employed in economical wall sandwich panels to save on weight and cost. Thin-gauge steel reduces the use of raw materials and makes it easy to handle during installation.
Although thinner steel decreases the impact resistance, it is still adequate in various low- to medium-risk conditions. You must make sure the panel thickness fits structural requirements and wind-load requirements in your project.
Key Features of Economical Wall Sandwich Panels
· Thermal Insulation Performance
Economical panels offer sufficient insulation for general industrial and commercial applications. EPS provides simple insulation, whereas PU and PIR cores provide higher thermal resistance. You have the option of choosing the level of insulation depending on the climatic factors and energy efficiency goals.
· Fire Behavior and Safety Level
The performance of fire depends on the core material. EPs panels have low fire resistance.
On the other hand PU and PIR panels have a superior fire behavior, with the PIR having the highest resistance among economical choices.
Before you choose these panels, ensure they comply with the set safety standards like the NFPA 285, GB 8624, ASTM E84 and EN 13501-1. Usually, these may vary depending on your geographical location.
· Structural Strength
The structural strength of economic panels varies with the steel thickness, panel profile, and core density. These panels are made to fulfill the standard load requirements of walls, but they are not meant to be used in high-impact or heavy-duty uses.
· Cost Efficiency
The main benefit of the economical wall sandwich panels is cost-efficiency. You save on material costs, transportation costs, and installation time. This renders them applicable in large-scale projects where budget control is paramount.
· Weight
Economical panels are light because of the thinner steel facings and low-density cores. Lightweight makes it easy to handle, reduces the foundation needs, and hastens the construction timelines.
· Ease of Installation
Prefabricated design enables rapid installation using easy fixing systems. You save time on labor and machinery requirements, and this, once again, minimizes the cost of the entire project.
Economical Panels vs Premium Sandwich Panels
| Aspect | Economical Wall Sandwich Panels | Premium Sandwich Panels |
| Cost Comparison | Costs much lower. You select them when cost constraints are more important than high-performance requirements. | More expensive because of the increased thickness of steel, high-density cores, and improved coatings. |
| Insulation Efficiency | Offer adequate insulation to moderate climates and non-critical conditions. | Provide increased thermal performance and greater airtightness particularly in extreme weather. |
| Durability and Lifespan | Shorter service life, though can be quite reliable with appropriate installation and care. | Increased resistance to impact and corrosion and longer service life. |
| Best Use Cases | Best suited for warehouses, temporary buildings, auxiliary facilities, and cost-sensitive projects. | Ideal for cold storage facilities, high-end business buildings, and long-term infrastructure projects. |
Typical Applications of Wall Sandwich Panel
· Warehouses and Logistics Centers
Warehouses and logistics facilities widely use economical wall sandwich panels. You enjoy rapid construction, adequate insulation, and low cost of the project.
· Industrial Buildings and Factories
Factories and workshops tend to focus more on functionality, rather than beauty. Economical version of wall sandwich panels offers sound enclosure, weather resistance, and thermal performance to the industrial processes.
· Cold Storage and Auxiliary Rooms
While premium panels are commonly used in main cold rooms, economical wall sandwich panels are suitable in auxiliary cold storage, corridors, and service rooms.
· Temporary and Modular Buildings
Economical wall sandwich panels are suitable for temporary buildings, site offices, and modular buildings. You can install, deconstruct them, and later use them with minimal cost implications.
Factors to Consider Before Choosing an Economical Panel
· Project Budget and Timeline
You must consider the total project cost and not only the price of the panel. Economical panels assist in reducing the time spent on building construction and labor costs.
· Local Building Codes and Standards
In all cases, make sure that the local fire, insulation, and structural regulations are adhered to. Other projects might demand higher-performance panels even with restricted budgets.
· Climate and Insulation Requirements
The insulation requirements are influenced by the climate conditions. You might need PU or PIR cores, rather than EPS, in the areas with severe temperatures.
· Expected Service Life
Determine the required period of performance of the building. Economical panels are appropriate for short to medium-term undertakings. Premium options might be justified by long-term facilities.
· Installation Considerations
Good installation guarantees the performance of the panel. You should take into account joint sealing, repairing systems, and alignment to avoid thermal bridging and water intrusion.
FAQs
Are economical wall sandwich panels energy efficient?
Economical wall sandwich panels provide low to moderate energy efficiency. PU and PIR cores offer superior insulation than EPS, therefore they can be used in most industrial applications.
What is the cheapest core material for sandwich panels?
The most inexpensive core material is EPS. It is lightweight in construction and simple to insulate at a minimum cost.
What is the difference between wall sandwich panels and drywall?
A wall sandwich is a panel that integrates the structure and insulation in a single system. The drywall needs an extra layer of framing and insulation.
How long do economical wall sandwich panels last?
Economical wall sandwich panels usually have a lifespan of 15 to 30 years with proper maintenance and installation, depending on the surroundings and quality of materials.
Lutonpanel; Your Trusted Economical Sandwich Panel Manufacturer in China
At Lutonpanel, we manufacture alternative sandwich panels specially designed for cost-sensitive industrial and commercial applications. Our team will help you choose the right core material and panel structure while recommending a custom finish to match your project.
For all your economical wall sandwich panels, Lutonpanel remains your trusted supplier in China – Get our latest prices now.
