Hi, I need a new white uvpc or wooden back door. This door leads from the bedroom into a shared garden so I need the top half of the door to have frosted glass and also need a window in the top section (for ventilation and the flat gets damp). The bottom half can be solid wood or uvpc. Please can anyone recommend a reliable, cheap and decent company that could provide a guarantee as well for installation/door. I am in East London. Many thanks