A sandwich panel is a cladding material for constructing walls and roofs. Each panel is made up of a thermal insulating core with sheet metal skins on both sides. Sandwich panels are curtain materials, not structural elements. The steel framework or equivalent carrier structure to which the sandwich panels are joined carries the structural stresses.
The thermo insulating substance employed as the core is utilised to categorise the different types of sandwich panels. EPS (expanded polystyrene), mineral wool, and polyurethane (PIR, or polyisocyanurate) sandwich panels are all easily accessible.
Thermal insulating performance, sound insulating performance, fire resistance, and weight are the key differences amongst the materials.
Sandwich panels, fire-preventing performance
Sandwich panels are typically constructed with two metal sides and an insulating core. The steel coating’s integrated linkage with the interior layer allows for the creation of a one-of-a-kind element that performs well in a fire. The panel’s fire-prevention capabilities may be enhanced depending on the material used for the core.
The dry building method has the benefit of allowing the components to be modulated according to the demands of the specific design. As a result, depending on the building’s intended use, sandwich panels with a fire-resistance class, or at the very least a response to fire class, i.e., the class that shows the building’s flammability class, may be more appropriate.
Because of the flexibility of the structures for assembly, the panels may be used for outer walls, roofing, and interior dividers, ensuring that the whole building envelope and walls operate uniformly. Whatever the goal, sandwich panels can help you achieve it: from thermal insulation to soundproofing, from resistance to stability, from waterproofing to fire protection.
The panels can really help safeguard buildings by stopping fires from spreading and restricting their size, thanks to the particular technological capabilities supplied by the materials that make them up.
How are sandwich panels installed on a wall or a roof?
Sandwich panels are easy to assemble and take very little time. An experienced construction crew can install 600 m2 of sandwich panels in roughly 8 hours, according to my experience.
The steps for installing wall and roof sandwich panels are as follows:
- Construction materials are delivered to the project site, including sandwich panels, subframe components, and accessories (including flashing, fasteners, gaskets, seals, etc.). Dana Steel UAE can provide all of the components required to complete the installation.
- The products delivered by the transporter are unloaded using construction handling equipment.
- Beams, posts, and purlins are inserted after the subframes are put together.
- Remove the sandwich panels’ protective covering.
- The sandwich panels are fastened to the subframe structural components using the necessary fasteners.
- The flashing is installed, and the sandwich panel connections are sealed.
How many bolts do I need to install a sandwich panel? This is the most common question customers have throughout the project planning stage. A preliminary estimate of 1.1 fasteners per square metre of sandwich panels has been made. The amount, distance, and arrangement are determined by the project design engineer and/or the construction material supplier.
Any type of sandwich panel may be used as cladding for walls and roofs. Depending on the project’s requirements, cladding may include the following:
- EPS-core sandwich panels(the budget option);
- Mineral wool core sandwich panels(for structures with improved resistance to fire);
- PIR-core sandwich panels(whenever good thermal insulation parameters are essential).
Sandwich panels may be used in a variety of structures. The only limit is your creativity. Sandwich panels are commonly utilised in industrial applications; however, stud partitions and sandwich panels are also employed in certain residential constructions.
Sandwich panels are most commonly used in the construction of:
- Warehouse buildings
- Logistic hubs
- Sports facilities
- Cold stores and freezers
- Shopping malls
- Manufacturing buildings
- Office buildings
because to their quick installation time and broad unit coverage. Sandwich panels can be combined with other structural solutions. A popular option is to install the panels as external cladding for the outer walls of shopping malls, including sandwich-layered roofing structures: box profile sheets, thermal insulation (e.g. Thermano PIR-core sandwich panels), and a waterproof membrane.
Types of Sandwich Panels: –
- PU Polyurethane foam (B2/B3), Polyisocyanurate (PIR), Rockwool, and Mineral Wool as Insulation
- DCP 35(38)/200 (Corrugated), DCP 45/250 (Flat), The profile height is from 35 to 45 mm, the normal width is 1000 mm, and the thickness of the profile sheet ranges from 0.4 to 0.9 mm.
- On the basis of the required finish: pre-painted finish in Aluminium (PPAL), Pre-painted finish in GI (PPGI), Pre-painted finish in Alu-Zinc (PPGL), and Mill Finish are all options for top corrugated sheet. All of the aforementioned, as well as Aluminium Foil backed Craft paper (AF), are available for the bottom liner.
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