Our Buffalo uPVC Facebook Page is regular updated with our recent installations. Please visit it and if you like it, let us know! Our Teams of installers are the best in the industry. See the Buffalo uPVC Services page. We are a Yale Locks approved installer and all locks to windows and doors come with a Yale Lifetime Guarantee with over £1000 paid by Yale for foreced entry. You must register your Buffalo order with Yale to comply with their warranty cover.