Yeah cheers cat. Much relieved it all turned out well without having to jump up and down and cause a stir. Our Site Manager was awesome. However if we hadn't been driving past the site 3 times a day and checking things out for ourselves, it probably would have slipped through unnoticed. The roof guys were telling our Site Manager that it was ok for the blanket to get wet. It wasn't until I rang Bradford and found out from their customer service team that the roof guys were incorrect, and then passed that information on to our Site Manager that he rectified the situation. The experience has highlighted for me just how important it is to get invested in the build process yourself and triple check things. And maintain good contact and relations with the Site Manager.