Coolaboola, the pull test and boroscopic test are both requirements for best practice on all agrement certs. The pull test is to determine the type of fixing suitable for the type of substrate you have. If the proper type of mechanical fixing is not used you could, in the future have a situation where your walls are becoming loose(worse case scenario!) due to wind loading depending on your location. Or simply you might not have enough fixings per board again depending on the location ie: west coast Ireland. The boroscopic test would be to determine what type of wall construction you have, which would also have an effect on the type of fixings used. If you determine that you have a hollow block house you should always check to make sure the top of your cavity is fully closed. If it is not this results in a level of thermal looping that makes a nonsense of a U-value calculation and definitely results in heat loss and much poorer airtightness. Many people are not aware of this and are not taking the proper precautions, resulting in an under performing external insulation system. All good installers should be able to make you aware of best practice.