Survey of a Craftsman house before it is lifted onto a new foundation
Example project
- Home
- 1920s two-story Craftsman house in Seattle, basement not yet finished
- Original request
- Lift the house, pour a new foundation and finish the basement as a living floor
- Testing
- About 14 samples from the basement walls and ceiling, the furnace and its ducts, the laundry floor, the plaster upstairs and the window putty
- Found
- Asbestos in the corrugated wrap on the furnace ducts and in the sheet vinyl on the laundry floor
- Clear
- No asbestos in the plaster, the kitchen floor, the window putty or the basement ceiling
- Timeline
- One visit by the inspector, then a written report within a few days
- Estimated testing cost
- $950
Scope of work
The inspector's visit, about 14 samples with each spot patched, the lab bill and a written report that measures every positive material in feet and square feet. Taking out the duct wrap and the vinyl is a separate price.
Project overview
In this example, the owners of a 1920s Craftsman house plan to lift it, pour a new foundation and turn the basement into a finished floor. The furnace, the ducts and the basement walls will all be disturbed, so the owners ask for a survey before they hire the foundation crew.
The corrugated wrap on the furnace ducts and the sheet vinyl on the laundry floor test positive. The plaster, the kitchen floor and the window putty are clear, so the removal list is short and the crew knows what to leave closed.
The goal
The goal is a short list of what the lift and the new lower floor will disturb, with the duct wrap and the laundry vinyl cleared first.
Process
- Before the visit The plans and photos shared, so the inspector samples only what the lift and the new lower floor will touch.
- Visit The inspector works through the basement first, then the main floor and the windows, labeling every bag.
- A few days later Results arrive with a report that gives the duct wrap and the laundry vinyl in feet and square feet.
- Then The positive materials are priced and removed before the furnace comes out and the lift begins.
Planning right
- The report measures every positive material, which is what the foundation crew needs to bid.
- Duct wrap counts toward the 48 square feet that call for a notice, so the survey measures it.
- Sampling the plaster upstairs settles a question that otherwise stays a guess.
- Rooms the lift will not touch can stay as they are.