What makes wall sandwich panels easier to install?

Factory-bonded facings and core form a ready-made envelope element. On site, these layers do not have to be laid separately in the same way as in wall sections built in stages. This reduces the number of operations. However, it does not mean that the panel on its own forms the entire wall without supports, flashings and seals.

The parameters depend on the core, thickness and construction of the specific product. A PIR panel can provide good thermal insulation at a small thickness, but its selection must also take into account fire, acoustics and loads. The reaction to fire of the material must not be equated with the fire resistance of the entire wall.

Before installation, the spacing, verticality and plane of the supports must be checked. Unevenness should not be corrected by forcibly pulling the panel into place with screws. This can deform the facing and make it difficult to close the joints. The support width and the arrangement of fixings must correspond to the documentation and the design loads.

Gate and window openings are also important. Their framing must be prepared so that the panels can be supported and a tight detail can be executed. Failure to agree dimensions often leads to cutting on site. Measuring in advance reduces material waste and allows suitable lengths to be ordered.

The panel edges are shaped to form the connection intended for the given system. This makes it easier to align subsequent elements and maintain the continuity of the envelope. However, not every interlock works in the same way. The variant with visible fixing differs from the arrangement with fasteners concealed in the joint.

The connection must be properly closed and sealed at the locations specified in the instructions. Random foam or sealant must not be used as a substitute for the system detail. Continuity of sealing at the base, corner and opening is important. A gap in a concealed location can impair the airtightness of the entire wall.

The large format speeds up covering the surface but makes manual handling more difficult. The lifting method must be matched to the length, weight and rigidity of the panel. Equipment and slings approved for the given product are used. Incorrect gripping can damage the edge or permanently deform the facing.

Packs must be stored in accordance with the instructions, on suitable supports and protected from water. The protective film has specified conditions and a removal time. Leaving it in the sun for too long can make it difficult to peel off. It is worth scheduling these actions in the works programme rather than treating them as final cleaning.

The fastener must match the type of structure and the panel thickness. Its pressure must not dent the facing or leave the seal loose. The fixing layout results from the design, including wind action zones. There is no single number of screws suitable for every wall made of sandwich panels.

Cuts are made with tools approved for metal facings. Swarf must be removed and the surface protected from scratching. With dark colours, heating and the rules for selecting length or span from the documentation must be taken into account. Colour is therefore not only an aesthetic decision.

Before delivery, approve the panel layout, the dimensions of openings and the complete set of flashings. Establish the unloading sequence and equipment access. The first panel should be positioned with particular care, as it determines the position of the subsequent ones. Progress checks allow an error to be corrected before it affects a large part of the façade.

At acceptance, check the joints, plinth, corners and opening flashings. Document the details that will be covered. Ease of installation results from the factory preparation of components and good organisation. A sandwich panel does not relieve you of design and accuracy, but allows you to use them for efficient completion of the enclosure.

A wall panel should not be swapped for a roof panel or vice versa without assessing the design. The facing profile, the joint and the method of water drainage are different. A similar core thickness does not mean the applications are interchangeable. Each element should go to the place intended in its documentation.