Ms Mair?ad Phelan:

The manufacturer will have carried out consistent and constant testing on a weekly, monthly and biannual basis on the construction product it produces and have records available of what it has placed on the market. With the withdrawal of these certificates, there was an inconsistency in factory production control, in that the source material, constituent aggregate, for the blocks in question was not as specified in the factory production control. The factory production control certificate had to be changed because the source material was not as specified in the certificate and it had to be recertified for that purpose. In any event all of the testing that was previously carried out was available to us. Manufacturers carry out due diligence and check stockpiles they may have for a couple of months. We have checked a certain percentage which we can go back to. They also have the records of who they sold all the products to. If they find a defect, they may have to recall the product.