Ours was a small job of about 200 sq ft on a flat roof terrace on Bowen Island BC. The job was set up professionally and in due course Penfolds turned up and did the job. Unfortunately they made a couple of errors. They spilled bitumen on to a deck and tried to cover it up with boards but, worse than that, they left the job with a large pooling area, where water collected and would not drain. Within two days I brought this to their attention. Two different inspectors turned up over the next six weeks, and both said the problem was real; it had been caused by the way they had done the work; it was something that had happened before but had not warned me of this prospect, and they would go back to HQ and discuss it. Weeks past. I received three subsequent telephone calls from nice people, but gradually it became clear that they had no intention of doing anything about it, despite acknowledging they had caused the problem. I was asked to pay more ($900, kindly discounted from $1800!) for the repair. They would not compensate me so that I could do the work myself, and threatened that my warranty would be voided if I did any work myself. As yet I do not have the building inspector sign-off, because the roof won't drain, and the deck is not useable. Penfolds appeared to engage in a scam, in which they used their size and much heralded guarantee mechanism to fend off legitimate complaints and gouge more money out of helpless customers. They are big and 'professional', but believe nothing of what they say of their guarantee. They use their size to put you off, escape their liability and take as much money as they can from you. read more