How can you reduce the cost of sandwich panels? Seven decisions before ordering

Do not buy parameters without a clear purpose either. In an unheated storage room the priorities may differ from those in a year-round service point. Every change relative to the design must nevertheless be checked. The function of the room does not exempt you from assessing loads and fire protection.

Count full modules and lengths. The wall area after deducting windows does not have to correspond to the purchase. A panel around an opening usually has a full dimension first. A cut-off piece is only useful if it has suitable edges, length and the possibility of correct fixing.

In the worked example, 84 m² of usable cladding requires 92 m² of panels. At an agreed net price of €32.40 per m², you buy the material for €2,980.80. The cost per metre of finished surface is €35.49 net. This result shows the effect of waste more clearly.

With several pavilions, check the possibility of repeating dimensions. A common module can simplify the order and reduce the number of non-standard sections. Do not, however, change the dimension of a window or support solely to suit a random length from a sale. The effects must be assessed for the entire building.

A very long panel reduces the number of joints but complicates transport and lifting. A shorter one requires an additional connection and support. Compare both variants together with the labour. The price of a single piece does not show which arrangement will be cheaper after installation.

Check the requirements on both sides of the panel. A damp interior or frequent washing may need a different solution from a dry warehouse. The external cladding is exposed to sun and precipitation. Saving on an unsuitable coating can shorten the period of trouble-free use.

Do not compare colour alone. The steel thickness, type of protection and approved working environment matter. For several buildings, order a colour sample and a description of the coating. Differences between batches may be visible even though the colour designation is the same.

Add flashings, fasteners, tapes and sealants to the price. The required elements result from the details. With a small façade, the share of corners and openings can be significant. A simple price list per m² does not cover the cost of finishing each panel and sealing the connection to another partition.

Ordering the accessories straight away can reduce urgent reorders. Do not replace them with random equivalents just to keep the discount. A wrong fastener or seal can cause a repair far more expensive than the price difference. Completeness is checked before delivery.

Ask about access, unloading and storage conditions. Delivery to the address does not always mean unloading the material from the vehicle. Long panels need suitable space and equipment. An inaccessible entrance may force additional transhipment and increase the risk of damage.

For a series of buildings, compare consolidated delivery with staged delivery. Joint transport does not always win if you then store the panels on site for a long time. The quote should take the actual schedule into account. The cost of crew downtime is sometimes more important than a small discount on transport.

For a heated pavilion, compare heat losses, airtightness and surface durability. A thicker core will not fix leaky connections. A good panel requires correct installation. The expected energy savings must be calculated for the whole building and the way it is used.

Also plan inspections and the possibility of replacing an element. A material without available documentation or with an unknown interlock will make repair difficult. The most favourable purchase gives a predictable cost of the enclosure over time. The discount percentage alone is only one of the data for comparison.