Guarantees There are broadly three different types of guarantee: Installation guarantee: A guarantee provided by the door / window installation company. Manufacturer’s guarantee: The manufacturer takes responsibility for the guarantee, not the door / window installation company. Insurance-backed guarantee: The insurance company takes responsibility for the guarantee, not the door / window installation company. However, there are companies that may make the claim that they have manufacturer’s guarantees and indeed insurance-backed guarantees when they do not. Here are some questions you can use to confirm this: Q: Do I have to pay for these guarantees? A: In most instances, no - the guarantee is normally issued free of charge. There is however, often the opportunity to extend a manufacturer's guarantee and a little money spent now can provide peace of mind in the long run. Q: Should the manufacturer's guarantee be supported by a guarantee registration card? A: Manufacturer's guarantees are usually supported by a consumer registration process. Manufacturers validate the guarantee by asking the consumer to return a registration card with proof of purchase, directly to them. Q: Are any remedial costs covered with the insurance backed guarantee? A: All remedial work should be covered under the guarantee. Q: Are the guarantees transferable? If I buy a house with PVCu windows and doors, will I be covered by the previous owners guarantee? A: Not all guarantees are transferable, but it is always worth checking with the installation company. Q: How do I find a reputable door / window installation company? A: Ask your friends and family if they would recommend a company that they have used.