Whats happening: 1100 sq ft new two story addition onto 1600 sq ft existing 70 year old double brick two story home (fully detached) in southern ontario (toronto). Full basement not included in those size numbers. Existing home has hot water gas, no a/c. This is to be removed and forced air gas system installed in entire 2700 finished home.
Mechanical engineer wants to come over to see the existing home and discuss what's involved before he starts the drawings for permits. Existing home will have lathe and plaster walls removed, reframed, and spray foam insulated, new windows, etc to maximize energy efficiency.
Can anyone share some tips for what I should be discussing, asking, etc this fellow? Like possible zoning, types of systems, etc. Any advice would be greatly appreciated. I want to make sure that this job gets done right and it seems to make sense to start with the engineer.
Thanks in advance.