Wall and Roof Sandwich Panels: What’s the Difference?
Sandwich panels are widely used in the construction of warehouses, industrial facilities, commercial buildings, hangars, cold storage rooms, and other prefabricated buildings.
When choosing a material, it is important to understand that wall and roof sandwich panels differ in design and purpose. Despite their similar appearance, they are designed for different operating conditions and loads.
Let us look at the main differences and determine which type of panel is suitable for walls and which one is intended for roofing.
What are wall sandwich panels?
Wall sandwich panels are designed for the construction of exterior and interior walls of buildings.
A panel usually consists of three layers:
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an outer metal sheet;
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a thermal insulation layer;
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an inner metal sheet.
Expanded polystyrene, mineral or basalt wool, PUR, and PIR can be used as insulation.
The main purpose of wall panels is to provide the required thermal insulation, protect the interior from external influences, and create a finished facade surface.
Wall panels can be installed both vertically and horizontally, depending on the building architecture and project requirements.
What are roof sandwich panels?
Roof sandwich panels are designed for roofing applications.
They also consist of metal sheets and insulation, but their design includes specific features that allow them to withstand weather exposure and operational loads.
The main visual difference is the more pronounced outer profile.
The stiffening ribs help the panel withstand loads caused by:
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its own weight;
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snow;
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wind;
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precipitation;
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installation work.
Roof panels also have a special joint design that helps protect connections from water penetration.
Main differences between wall and roof panels
Although both types of panels are manufactured using similar technology, there are several important differences between them.
1. Purpose
Wall panels are used for facades, partitions, and enclosing structures.
Roof panels are designed for roofing.
Using a wall panel instead of a roof panel without an appropriate engineering design is not recommended.
2. Shape of the outer profile
Wall panels usually have a smoother and more decorative profile.
The surface may be:
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smooth;
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micro-profiled;
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trapezoidal;
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wave-shaped.
Roof panels have higher stiffening ribs. These are necessary to increase structural strength and improve water drainage from the roof surface.
3. Locking joint
The locking joint is one of the most important elements of a sandwich panel.
In wall panels, the joint is mainly designed to ensure tight contact between adjacent elements and reduce heat loss.
In roof panels, the locking system must additionally prevent rainwater and meltwater from entering the joint.
Therefore, roof panel locks usually have a more complex shape.
4. Loads
Walls mainly experience wind loads and their own weight.
The roof must additionally withstand snow loads and precipitation.
That is why, when choosing roof panels, it is especially important to consider:
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spacing between supports;
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panel thickness;
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metal thickness;
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type of insulation;
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expected snow load.
All these parameters must comply with the building design.
5. Installation
Installation technology also differs.
Wall panels are attached to columns, beams, or other structural elements of the building frame.
Roof panels are installed on roof purlins with a specified slope.
When installing roof panels, it is especially important to maintain the correct installation direction and properly seal longitudinal and transverse joints.
Installation errors may lead to leaks.
Can wall panels be used on the roof?
In most cases, no.
Wall panels do not have the profile and joint design required for full use as a roofing material.
Even if the panels look similar, their technical purpose is different.
For roofing, it is better to use special roof sandwich panels designed to withstand the required loads and effectively drain precipitation.
Can roof panels be used for walls?
Technically, this may be possible in some cases, but usually there is no need to do so.
Roof panels have pronounced ribs, so the appearance of the facade will differ from standard wall solutions.
In addition, their design is optimized primarily for roofing applications.
For facades, it is more practical to use panels specifically designed for walls.
Is the insulation different?
Wall and roof panels can be manufactured with the same types of insulation.
For example:
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expanded polystyrene;
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mineral wool;
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basalt wool;
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PUR;
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PIR.
The choice of insulation depends less on whether the panel is intended for a wall or roof and more on the purpose of the building, required thermal insulation performance, fire safety requirements, and budget.
What thickness should you choose?
Panel thickness is determined by the project and the building’s operating conditions.
For premises where high thermal insulation is not required, thinner panels may be used.
For heated buildings, cold storage rooms, and facilities with higher energy-efficiency requirements, thicker panels are used.
When selecting panel thickness, consider:
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regional climate;
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purpose of the building;
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indoor temperature;
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type of insulation;
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spacing between structural frame elements.
The higher the thermal insulation requirements, the more carefully the panel thickness should be calculated.
What should you choose for construction?
If you are building walls, choose wall sandwich panels.
If you need a roof, use roof sandwich panels.
For most prefabricated buildings, both types are used at the same time: wall panels form the facade, while roof panels create a warm and weather-protected roof.
What to consider when buying
Before ordering sandwich panels, it is recommended to clarify:
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panel type — wall or roof;
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panel thickness;
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metal sheet thickness;
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type and characteristics of insulation;
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product length;
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available RAL colors;
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locking joint design;
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required accessories.
It is better to purchase wall panels, roof panels, and accessories from the same manufacturer. This makes it easier to match colors, dimensions, and connecting elements.
PanelCity wall and roof sandwich panels
PanelCity manufactures wall and roof sandwich panels in Uzbekistan.
Depending on the project requirements, you can choose the appropriate insulation type, panel thickness, length, and color from the RAL catalog.
PanelCity also manufactures accessories for corners, joints, roof connections, ridges, plinths, window openings, and door openings.
A complete order makes it possible to receive panels and accessories that match each other in size and color.
Conclusion
The main difference between wall and roof sandwich panels lies in their purpose and design.
Wall panels are intended for facades and partitions, while roof panels are designed for use as part of a roofing system and to withstand snow, wind, and precipitation.
Choosing the correct panel type helps ensure the reliability, thermal insulation, and durability of the building.
Before purchasing, it is important to consider the characteristics of the insulation, metal thickness, panel dimensions, and project requirements. PanelCity specialists will help you select suitable wall and roof sandwich panels for your project.
