Step by step
7List what you cannot see
Name each hidden area and the question it raises. Silence from a visual survey says nothing about what is behind.
Write down · NoteStart with the least invasive look
Go from records to surfaces, then probes through existing gaps. Open only where those leave the question unanswered.
Write down · NoteLocate services in the path
A qualified person marks wiring, pipe, and tubing in the path and checks the far side. Plans can be wrong.
Write down · PhotoTest suspect material first
In older buildings, have qualified people test suspect insulation, paint, or tile before anyone opens or cuts it.
Write down · TaskGet a yes for the opening
Tell the customer what will be opened and why. Record their yes before any cut.
Write down · DecisionOpen the smallest window
A qualified person opens the smallest spot at a chosen place. Photograph before, during, and after, including the back of the material.
Write down · PhotoCarry open questions as allowances
Keep each unanswered question in the quote as an allowance, with the test that would close it. Record found conditions as found.
Write down · Note
A finished run leaves located services, test results, the customer's yes, photos of the opening, and open items as allowances.
General guidance for a qualified person, not a finding about any home. The person on site decides.