The chosen position should allow for doors, furniture and normal room use. Agree the layout before drilling. A wall photograph with approximate dimensions can help identify conflicts without relying on a generic hanging height that may not suit the space.
A mirror can be heavier than its appearance suggests. Provide weight information and a photograph of its rear hanging system. The wall fixing and the fittings on the frame must both suit the load; neither should be judged from the front view alone.
List the weight and fittings for each picture or mirror separately. Similar dimensions can conceal very different loads. A combined request helps plan the visit, but every object still needs compatible support and its own agreed position and handling requirements.
The agreed service covers layout, hanging-system and substrate review, compatible fixings for assessed loads. Exclusions: Glass cutting, frameless glazing, conservation handling, oversized unsupported loads, electrical work.