Have you had render by the The Wall Coating Company (TWCC). Did you get a 20 year insurance policy for the work? Your insurance policy may be worthless. I contracted with the The Wall Coating Company who (6 months and many many problems later) completed the work and sent a Guarantee certificate and an Insurance Policy Document. My insurance policy policy stated that contractor was WCC Systems Ltd. The contract, work and payments are all to The Wall Coating Company, so who is WCC Systems Ltd? I have been told that The Wall Coating Company is a trading name of WCC Systems Ltd and they, but neither I, the broker and the Insurance company have any paperwork that shows that. The address and phone numbers for the Wall Coating Company are totally different to WCC Systems Ltd. I queried this with the Policy Broker and they confirmed that, because of the different names on the different paperwork, the Insurance Policy is (or could potentially be) invalid. After some discussion, the broker will be sorting out he situation by amending the policy document to reflect that The Wall Coating Company is the trading name of WCC Systems Ltd. So. Have you had render done by The Wall Coating Company (TWCC)? Take a close look at the part of the Insurance Policy Document which states who the Contractor is. If it says WCC Systems LTD and your guarantee certificate is by The Wall Coating Company, it may be invalid. If anyone is thinking of contracting with The Wall Coating Company, be prepared for poor quality render (wonky, corners uneven, not level, not straight etc.) with the render dropped over your brand new windows and your paving slabs. Then be prepared for 6 months of trying to get the render to be put right. Eventually you may get hold of the Director Michael Richard ACKROYD who will deny any problems, accuse you of nit-picking and nagging and then threaten to send a team to remove the render from your walls.