How do you compare the installed cost of sandwich panels from suppliers in Poland?

Pay attention to the unit of price. It may refer to an effective square metre, the total area, or a whole piece. For sheet metal, a linear metre also appears. Only convert the rates after establishing the coverage and length. The number next to the euro symbol alone is not enough.

Check whether the given values are net or gross. Compare the same tax scope and the same number of elements. Note the validity of offers, because material and transport prices can change independently.

First, arrange the panels on the walls and roof. Mark the cuts and the sections that cannot be used. Only then divide the purchase cost by the area of the finished cladding. This indicator shows the effects of the cutting plan better than the nominal price per metre alone.

Let us take a hypothetical example: the finished cladding must cover 140 m². Option A requires the purchase of 170 m² at €21.29 net and delivery for €162.01. The cost is €3,781.31 net. Option B allows 145 m² to be purchased at €24.07, with delivery for €115.72. In total this is €3,605.87 net.

Despite the higher rate per metre, variant B is cheaper in the example by €175.44 net. The cost for 140 m² of finished cladding is approximately €27.01 and €25.76 net per m² respectively. The comparison assumes the same technical suitability and the same remaining scope. The amounts are an illustration, not a current price list.

When its dimensions fit the actual cutting plan and its condition allows the planned use. Short panels may prove suitable in small areas, but they will not replace an arbitrarily long element without additional connections and supports. Do not buy the whole batch just because the price looks attractive.

Determine the reason for the price reduction. A minor visual defect differs from damage to the interlock, delamination or missing necessary data. The description “second grade” does not by itself say which properties have been retained. Each batch must be assessed in relation to the planned task.

Also check the possibility of supplementing missing pieces. The offcut may have a profile, colour or coating that cannot easily be ordered. The reserve should result from the cutting plan and the condition of the elements, not from a general percentage added without inspection.

A further supplier may have more favourable material but require a different vehicle or date. Establish the cost of transport, unloading and any waiting time. Check whether long elements will fit on site and whether suitable supports have been prepared for storage.

For staged construction, assess the cost of two deliveries and the cost of storing one large batch. Repeatedly moving packs increases the risk of damage. If the material must lie for a long time, storage conditions become part of the real profitability of the purchase.

Also take into account the availability of flashings and fixings. Very cheap panels without matching accessories can delay installation. Compare the delivery date of the complete enclosure, not the arrival date of the first pack.

Prepare a short table covering the full cost, usable area and technical compliance. Record the limitations of each offer in a separate item. This may be the need for cutting, lack of supplementation or greater unloading requirements. This makes it clear what the difference results from.

Clarify doubtful parameters before ordering. Do not assume that a “typical panel” has all the properties required in the project. When the seller proposes a replacement, compare its data with the adopted solution. The same thickness is not enough to confirm equivalence.

After selection, keep the specification and delivery arrangements. On receipt, check that this particular batch and configuration have been received. A favourable calculation only makes sense if the material actually corresponds to what was compared.

When purchasing a larger quantity, also check the rules for reserving material. A quote and a physically allocated batch are different things. The order confirmation date should be coordinated with the readiness of the construction.