Screwing into the face of a upvc not only invalidates any warranty you have on the door but also weakens the plastic which will simply split if anyone forces it. The only available chain you can use is shown if you Google "upvcdoorchain.com" and will cost you about £10
DIY how to tutorial projects and guides - Did you know we have a DIY Projects section? Well, if no, then we certainly do! Within this area of our site have literally hundreds of how-to guides and tutorials that cover a huge range of home improvement tasks. Each page also comes with pictures and a video to make completing those jobs even easier!