
Plaster wall opened for a wider bedroom window
Example project
- Home
- 1920s house in Hayward, with plaster walls and plank floors
- Original request
- A wider window and a closet in the front bedroom
- Testing
- Separate samples of the gray base coat, the white finish coat and the ceiling
- Found
- Asbestos in the base coat; the finish coat and the wood lath are clear
- Opening
- One wall of about 90 sq ft, under the 100 sq ft that needs a J#
- Work
- Plaster and lath taken off wet in sections inside plastic, with a filtered air unit
- Timeline
- Two days of removal before the carpenter
- Cost
- $3,100
In this example, the owners of a 1920s house in Hayward want a wider window and a closet in the front bedroom, which means opening one plaster wall. About 2,000 Hayward homes were built before 1940, and their walls are plaster on wood lath, so each layer goes to a lab before the carpenter makes a cut.






