Comparing sandwich panel offers across Poland

A common specification should cover the core, facings, coatings, colour and intended use. If the project sets fire requirements, include the appropriate classification of the whole solution. A lower material price with different properties does not mean savings on delivering the same task.

For quotes from distant warehouses, also establish whether the stated quantity refers to one consistent batch. Combining remnants with different parameters may require a separate division of the façade. Add this to the table before calculating the apparent saving on the combined area.

Assume you need 210 m² of finished wall. Batch A covers 228 m² at an agreed €29.63/m², that is €6,755.64. Batch B allows you to order 214 m² at €31.25/m², that is €6,687.50. Here the more expensive purchase metre gives a lower material value because the lengths fit the wall layout better.

This is a net example, excluding transport and extras. Dividing the panel value by 210 m² gives approximately €32.17 and €31.85 per square metre of finished surface. However, you should not assume that every offcut is recovered. A piece without a proper tongue and groove or with an inconvenient length may not be usable in this build.

Match the flashings and seals to the same panel system. When the panel is available cheaply but a non-standard detail has to be designed and made separately, the price difference may shrink. Also verify the fixings for the actual thickness of the supports. A universal bag of screws is not a schedule for the entire building.

The comparison should reveal missing elements: gutters, opening substructures, base trims or installation accessories. Note who supplies them. This way you will not consider a quote limited to panels as equivalent to a proposal covering the entire envelope.

Long elements occupy a specific space on the vehicle and require planned unloading. Determine the number of trips, the possibility of transporting accessories together and access restrictions to the site. The cost may depend on the dimensions and route organisation, not just the kilometres between the warehouse and the construction site.

If you plan to install in stages, calculate the effects of two smaller deliveries versus one larger one. A single transport can reduce the transport cost but requires space for proper storage. Splitting deliveries reduces the space occupied on site but increases the risk of differences between batches and requires confirmation of conformity.

The designation of second grade is sometimes related to appearance, dimension or specific damage. Ask for a description of the cause and the documents assigned to the batch. Do not assume that a nice surface means all parameters are maintained. In a heated building or where fire resistance is required, this is particularly important.

Also assess the possibility of supplementing the material in the event of a design change. It is not about buying a large stock unnecessarily. It is about knowing whether the missing two panels can be matched to the already planned layout. Different locks and modulations may force a change of the entire façade area.

Build a simple table: quantity used, purchase value, flashings, fasteners, sealants, transport and unloading. For each item, state whether it is confirmed or estimated. Compare totals only for variants that meet the project requirements. Then the lowest total has a clear meaning.

Before deciding, confirm the date and the specific lengths covered by the price. A general availability advertisement does not reserve the required batch. Keep a written list of the accepted scope so that the contractor, supplier and investor work from the same data, even when the construction site is far from the point of purchase.