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.
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.
Masonry, plasterboard and other surfaces need different fixing assessments. Share what is known about the wall and nearby services. Existing holes do not establish suitable support for a heavier object, and unknown construction can require further review before installation.
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.