Avoid overpaying for sandwich panels: seven checks before accepting a quote

Wall and roof panels have different intended uses. Even two PIR-core versions can differ in geometry or fixings. A façade may use exposed fasteners or a joint in which the next panel edge conceals them. The quotation must identify that difference: it affects more than the appearance of the finished wall.

Record the full product name and required properties. For a proposed substitute, obtain a comparison of the specifications. Thickness alone does not establish equivalence. If a lower price results from changing the product, identify precisely what changes and whether the design still permits that version.

Prepare the cutting plan before purchasing. Mark each wall, opening and panel. Check whether offcuts can be used elsewhere, but do not assume they can: the joint and installation direction may prevent their reuse.

For a panel with 1 m cover width, each extra metre of length means another 1 m² of purchased material. An excess length of 0.5 m on 30 panels adds 15 m². Compare that cost with the discount on an available batch. At 1.1 m cover width, the same length allowance adds 16.5 m². These are worked examples; use the actual cover module of the offered panel.

The facings affect panel behaviour and durability. A cheaper version may use a different sheet thickness or surface protection. Require details for both sides rather than the general description “coated steel”. The selected coating must suit the service environment.

There is no need to pay for an unnecessary feature, either. Selection should follow the design and service conditions. Comparing two suitable versions is reasonable; arbitrarily reducing facing thickness to save money can change load-bearing capacity. That decision cannot be based on a sample’s appearance.

Ask about versions included in the standard production schedule. A change of colour or delivery date can sometimes simplify supply. There is no universal surcharge across manufacturers: the amount depends on the particular configuration and order size.

For end-of-batch stock, check shade consistency and whether matching material can be ordered later. A façade assembled from unrelated colours may need repainting or rebuilding. Heating of long panels matters too: dark surfaces experience different thermal conditions from light ones. Include that in the assessment of the selected version. Colour is therefore more than an aesthetic choice.

Count the flashings for the base, corners, openings and roof. Add screws, saddle washers, tapes and suitable sealants. List each in the units used for ordering. A price per flashing piece is different from a price per linear metre.

Fasteners for different substrates and the various seals have specific jobs. Random substitutions may appear cheaper but make installation harder. Obtain a schedule for the complete system. Add any omitted components before comparing quotations; otherwise, the cheapest list may simply be incomplete.

Provide the exact address, longest component and access conditions. Agree the unloading equipment. Check small-batch surcharges and waiting charges. Transport terms for one product family should not be assumed to apply to every material from that manufacturer.

Obtain confirmation of the price and date for the complete order, with an understandable breakdown of the total. When using several suppliers, check whether panel savings cover the additional freight. A combined delivery of compatible components can simplify the job, but its value must be calculated together with the method and cost of unloading.

Check the model, quantities, quotation validity and description of the quality grade. For outlet material, require a list of defects. Establish which documents will accompany the goods. Read warranty and complaint terms before paying, and compare warranty coverage as well as its stated duration.

Keep the written agreement so that it can be compared with labels and material condition on arrival. Avoiding unnecessary purchases and remedial work usually offers the most useful saving. A discount complements a well-prepared order. Without a specification, it is difficult even to decide whether the lower price represents a better offer.

With a complete materials list and the same scope in every quote. Then compare available lengths, colours and delivery arrangements.

No. Waste, accessories, labour and transport can reverse the comparison.