We’d say it’s better to over order than under order. Nobody wants to come to the end of fitting their brick slips and find they are just a few short and need to order again along with extra delivery charges.
We always recommend to add an extra 5% to your order to account for wastage.
If you do find you have over ordered and would like to return the extras you have. That’s no problem at all. Get in touch with our team who will be happy to help out.