Thanks for your responds. I forgot to mention... when I drilled the hole for the additional lock there has been a thin layer of metal on the outside. Does it mean those are composite doors? I heard that composite doors have some mixture of plastic and glass outside, not metal.
Hi guys, at the beginning I would like to thank you for all of your advices on this forum which helped me a lot in the past. I was wondering if you can give me advice on what kind of front doors do I have? Are they composite, upvc or any other? I was thinking of replacing them, but if they are...