Buying PIR boards for a large project: specification, deliveries and batch checks

With multiple pallets, batch information is easily lost once the packs are opened. Keep the labels and assign them to installation areas. If a discrepancy is reported, you can identify its extent. Traceability supports quality control alongside inspection of the installed work.

In each quotation, identify the price of the main insulation layer separately from components for parapets, outlets and equipment bases. For every line, check that thickness and declared thermal conductivity deliver the required resistance and that the facing suits the specified adhesive.

An average square-metre price can hide omissions at edges or around equipment. Divide the enquiry by function and board type. Uniform boards, tapered pieces and junction components may each need a separate line. Comparing like-for-like items exposes missing components and shows whether a lower price covers the same work.

Before choosing a larger board, trace its route from pallet to installation point. A long board can be quick to lay on an open roof but impossible to turn in a narrow corridor. Divide the delivery into lots that match the sections ready for installation and the available storage.

Schedule deliveries to match the rate at which the crew can close each section. Allow for crane availability, storage areas and the sequence of trades. Early deliveries can block the work area, while late ones can prevent the envelope from being closed. Agree a lot size for each phase to keep boards in good condition and minimise exposure before protection is in place.

Mark both factory edges and cut edges on the cutting layout. An offcut from the first row can start the next only if its dimensions and remaining edge profile suit the joint detail. Check one bay before multiplying the board count by the number of repeats.

A trial bay reveals whether the board format fits the structural module and openings. Adjust the cutting plan before extending installation across the whole area. Check which offcuts retain the edges required for later joints. Planning a repeatable bay reduces waste without compromising joint quality.

For a bonded assembly, list the board reference, facing type, adhesive and substrate together in the order. If joint tape is purchased separately, check that it is intended for the same facing. Assign responsibility for checking compatibility between line items before dispatch.

Agree who will confirm the junction where board, adhesive, tape and structural element meet, especially if different suppliers are involved. Correct labelling of the individual components alone does not establish that they work together. Ask for confirmation for the actual assembly. This also gives you a basis for assessing substitutions if stock availability changes.

Compare the cost of complete deliveries for each phase with a delivery that needs a second trip for missing accessories. Include repeat unloading, temporary protection of the unfinished section and the crew time needed to return to the same work area.

Delivery terms and completeness have a direct cost on a large site. One missing accessory can prevent an entire section from being closed, leaving the crew to stop and restart. When comparing offers, check how discrepancies can be reported and the time allowed for resolution. This places the quoted price in the context of the actual programme.

For a 105 m² rectangular area, a nominal 1.20 × 0.60 m board covers 0.72 m² and a 2.40 × 1.20 m board covers 2.88 m². Divide the area by each figure and round up: the lower bounds are 146 and 37 boards respectively. Before ordering, check the effective cover area for the specified edge profile, draw the cuts and find the number of boards per pack. Only then convert the quotation into a deliverable number of packs.