What do panels cost per square metre of finished wall after cutting?

Panel layout requires the cover width. The full width of the element may include the part that works in the joint. It should not be added as another fragment of the finished wall. The seller’s basis for settlement should be stated separately and unambiguously.

Also establish whether the price is net or gross and which variant it describes. The core type, thickness, sheets and coatings must be comparable. A matching colour and a similar number of millimetres do not confirm that two items are equivalent.

Let us take a simple wall 9.50 m wide and 3 m high. Its area is 28.50 m². The panel under consideration has a module of 1.13 m and will be installed vertically. Eight strips give only 9.04 m, so nine are needed for the described layout.

Nine full panels 3 m long mean 30.51 m² of area calculated by cover width. The last strip requires adjustment to the end. The difference from the wall area is 2.01 m². This is the result of this geometry, not a general waste norm.

Before ordering, check the width of the remaining fragment and the fixing position. A cut panel must have a correct termination. Changing the module or the division can improve material utilisation, but requires conformity with the supports and corner details.

For a wall of variable height, prepare a separate length for each strip. Calculating all panels by the highest point can overstate the purchase. An average height, in turn, will not provide material for the higher sections.

Not every metre of opening can be deducted from the order. If a window is cut from a full panel, part of the material still has to be purchased. A different cutting pattern may be possible when an opening crosses several fields. It must, however, preserve the correct connections and support.

Mark all openings on the drawing together with their distances from the edges. This shows where short sections and narrow strips will occur. Sometimes a minor adjustment to the layout makes installation easier. However, do not move the joinery arbitrarily without consulting the design.

Flashings and seals adjoin the opening. Their cost may increase despite the smaller area of visible panels. Therefore compare the full scope of materials for the finished façade. The square metreage alone after deducting windows does not describe the number of required elements.

Let us return to the wall of 28.50 m² and the order of 30.51 m². At an assumed price of €29.63 net/m², the boards cost €904.01 net. This is a calculation example, not a current offer. Let us additionally assume €166.64 net for processing and fixings and €97.21 for delivery.

The sum of the scope defined in this way is €1167.86 net. Dividing by 28.50 m² gives approximately €40.98 net per square metre of finished wall surface. Installation and construction are not included here. Their cost must be added if the aim is the price of a complete execution.

It is worth keeping both rates. The price €29.63 describes the unit of the material purchased, while €40.98 is the result of the adopted set per surface used. Do not compare the second figure with the panel price alone at another seller. First align the quantities and the scope.

Attach the wall drawing and a list of lengths. Ask for the number of pieces, the module and the billing area. For flashings, indicate the cross-sections and lengths. A general term “complete set” does not allow verification of whether every termination has been included.

If a different module is offered, ask for a new cutting layout. A lower price per metre may mean a larger quantity to purchase. Conversely, a seemingly more expensive panel may fit the field width better. The answer is a calculated layout, not the rate alone.

Before approval, check the dimensions of the constructed structure. A change in the opening width or the position of a corner may affect the last strip. Keep the version of the cutting layout on which the order was based. This allows later adjustments and their effect on the price to be controlled.