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4 cited sources on this page · Reviewed August 16, 2026Key takeaways
The short version
- Plaster and lath dry slower and add an organic layer.
- Balloon framing carries water between floors invisibly.
- Pre-1978 buildings raise lead requirements before demolition.
- Investigation is a larger share of the job than in new construction.
The short answer
Direct answer
Older Vermont buildings hold and move water differently: plaster over wood lath dries slowly and adds an organic layer, and balloon framing lets water run between floors with no visible path. Drying takes longer, investigation matters more, and any pre-1978 building raises lead requirements before demolition begins.
Plaster behaves differently from drywall
Plaster over wood lath is thicker, denser and holds more water than paper-faced drywall, and it releases it slowly. Sound plaster can often be dried and saved where drywall would be removed, which is good news for the building and bad news for the schedule.
The wood lath behind it is an organic layer inside the assembly, and it stays wet after the plaster face feels dry.
Balloon framing and the invisible path
In balloon-framed walls, studs run continuously from the sill to the roof rather than stopping at each floor. That creates an uninterrupted cavity, so water entering at an upper level can appear two storeys down with nothing wet in between.
It also means the affected area cannot be assumed from where the stain is. Investigation has to follow the cavity, not the room.
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Why drying takes longer
More mass, denser materials, multiple layers and cavities that are hard to reach all extend the drying phase. Specialist techniques for drying inside assemblies are more often needed.
A drying schedule quoted from experience with modern construction will be wrong in an 1890s Burlington duplex.
Lead and asbestos come first
In a pre-1978 building these are not optional considerations and they are settled before demolition rather than during it.
- Painted surfaces disturbed in a pre-1978 building raise lead-safe work practice requirements
- Some older materials raise asbestos questions that require assessment
- Vermont publishes contractor requirements and a licensed contractor lookup
- Requirements apply to the work regardless of who is paying
- Discovery mid-project is the most common cause of a mid-job pause
Knob-and-tube and old systems
Older electrical, and any component that was wet, is an electrician's call rather than a restoration one. Insulation packed around old wiring that has been wet raises its own questions.
Opening walls is also the moment to find out what is actually in them, which is frequently different from what anyone assumed.
Matching what comes out
Reinstatement in an older building involves matching profiles, plaster finishes and trim that are not available off the shelf. That is a reconstruction cost and a schedule item, not a mitigation one.
Where original material can be saved rather than replaced, saving it is usually both cheaper and better. Say so early, because the default in demolition is removal.
Burlington's building stock, specifically
Burlington's Old North End, the Hill Section and the older parts of Winooski and Essex Junction carry large numbers of pre-1940 wood-frame houses and duplexes, many converted to apartments, with plaster interiors and balloon-framed walls.
Vermont publishes both residential contractor registration and a lookup for licensed lead and asbestos contractors, and for a pre-1978 Greater Burlington property those two references belong in the conversation before anyone opens a wall.
Clear answers
Common questions
Can wet plaster be saved?
Sound plaster can often be dried and retained where drywall would be removed. It dries slowly, and the wood lath behind it stays wet after the face feels dry.
Why did water appear two floors below the leak?
Balloon framing runs stud cavities continuously between floors, so water can travel down inside a wall with nothing visibly wet in between.
Does my old house need lead testing before demolition?
In a pre-1978 building, disturbing painted surfaces brings lead-safe work practice requirements into scope. Vermont publishes contractor requirements and a licensed contractor lookup.
Will drying take longer in an old house?
Generally yes. More mass, denser materials and harder-to-reach cavities all extend the drying phase compared with modern construction.
Why does an old house take longer to dry?
Plaster over lath, board sheathing and multiple layers of added flooring all hold more water and release it more slowly than drywall over studs. The drying is longer and depends more on readings than on appearance.
What is balloon framing and why does it matter?
In the oldest stock, wall cavities run uninterrupted from the sill to the attic, so water and smoke travel vertically inside a wall with nothing to stop them. A loss that looks like one floor often is not.
Authoritative references
Sources used on this page
Time-sensitive rules and public guidance should be checked at the source before work begins.