Selection of sandwich panels
Will white PIR wall panels 100 mm thick and 2480 mm long fit your wall?
In brief
A small batch of white PIR wall panels 100 mm thick may be useful in a small building. First, however, you need to check whether the 2480 mm length fits the walls and details. Second-grade material also requires an assessment of the actual deviations. Colour and thickness alone do not tell you how much material you will use or whether it can be installed tightly. The description should indicate a wall panel, PIR core, 100 mm thickness and 2480 mm length. The cover width, facing thicknesses and type of coating are also needed. The term “white” does not replace the shade and surface finish code.
What exactly does the description of such a batch mean?
This is not information on current stock levels. A variant described in this way must always be confirmed in a specific offer. Photos should show the delivered batch or clearly indicate its condition. In second grade, the differences between individual pieces matter, not just the appearance of one sample.
Compare the whiteness of several pieces in the same light. A difference in shade may only become visible once the panels are placed next to each other. If it is to be accepted on the finished façade, it is worth establishing this at the batch assessment stage.
How do you check the length against the wall height?
A 2480 mm panel will not close a wall section higher than its actual length and the mounting detail allow in one run. Support, clearances and flashings must be taken into account. The nominal room height should not be treated as the finished order length.
Where 2600 mm is required, the shortfall is not eliminated by a random strip pushed in at the top. An additional joint requires a suitable solution and support. If the project does not provide for this, a shorter batch may not be worthwhile. First measure the building, then match the available pieces.
How do you calculate the area of one board?
With an example cover module of 1130 mm, a 2480 mm long element gives 1.13 × 2.48 = 2.8024 m² of coverage. Ten such pieces is 28.024 m² before offcuts. This calculation is for the assumed module. A different panel width gives a different result.
Do not use the overall width for this if the offer settles on effective area. Check the unit in the documents. With a short wall, the last panel usually has to be adjusted. The usable area will result from the cutting plan, not just from the sum of metres in the purchased batch.
How do you assess defects in second-grade material?
Separate visual deviations from those that affect the panel’s performance. A scratch, a dent and a damaged lock are not equivalent. Check the bond between facing and core, the edges and the condition of the sheet metal protection. Not every defect can be safely hidden under flashings.
Ask for a description of each group of deviations and the possibility of linking it to the batch. If the wall has thermal or fire requirements, the relevant material properties must be confirmed. The original product name alone does not guarantee that a damaged piece retains all characteristics.
Is 100 mm enough for a heated room?
This depends on the project requirements and the specific panel. In an example wall family, PIR 100 mm has Uc 0.22 W/(m²·K). This result should not be attributed to every batch of that thickness. Data for the variant and an assessment of the joints of the entire enclosure are needed.
In a small building, the doors, gate and floor junction also matter. Panel thickness does not compensate for a leaky opening perimeter. Determine the pattern of use and ventilation. If the room is to be heated continuously, the selection should follow the full requirements, not just an attractive batch price.
How should short pieces around openings be planned?
Draw the walls and mark the places where the full 2480 mm length will be used. Then check the strips above doors and below windows. An opening requires framing, and the remaining pieces require appropriate support. Do not assume that every offcut will become a standalone element.
If you plan a horizontal layout, check the supports at the ends of the sections. Vertical joints affect the appearance of the façade and the number of flashings. Shorter panels can help with delivery to a narrow property. However, the benefit must be weighed against the additional work at the joints.
When does the price of a batch actually make sense?
Calculate the cost of the used area together with waste and accessories. Add any repairs permitted for the material and transport. Compare with ordering panels of a better-matched length. A low price per metre does not determine the final saving.
Before purchase, agree the terms of liability and the acceptance procedure. Keep a list of the pieces and a description of the deviations. This will allow you to check whether the delivered material corresponds to what was agreed. The decision should follow from matching the specific batch to the specific wall.
Questions before ordering
Does a length of 2480 mm mean the finished usable height of the garage?
No. The dimensions of the structure, floor and installation details are also needed. The nominal panel length does not automatically determine the interior height.
Does white second grade always have only a colour defect?
No. The reason for classifying the batch must be checked. Deviations may relate to the surface, geometry, edges or other properties.
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