He is doing it to find where it hits wood. That wood is the ceiling joist. Then he has screwed into the ceiling joists on either side of the crack to stabilize the area. It helps to look into the attic beforehand to verify which direction the joists run and to verify how far apart they are (commonly 16 inches from center to center).
I was so worried about this on my ceilings so I called in two different foundation experts. They both told me the same thing. My foundation was perfect but when they were originally putting up the plaster they must have done a bad job. Over the years as it settled and dried, it just would crack open. So basically check foundation and then if its all good just plaster it over.
@@Chuco029 The plaster in my house in spots has settled and pulled completely away from the original nails fastening it to the joist. I'm fastening like this video shows and hoping the crack doesn't come back. Mine's gyprock lathe and drywall screws will catch the backing.
How does tapping the nail into the crack help you find the ceiling joists? What am I looking for?
He is doing it to find where it hits wood. That wood is the ceiling joist. Then he has screwed into the ceiling joists on either side of the crack to stabilize the area. It helps to look into the attic beforehand to verify which direction the joists run and to verify how far apart they are (commonly 16 inches from center to center).
I got the same exact kind of cracks in my first floor ceiling. How did those cracks come about?
I was so worried about this on my ceilings so I called in two different foundation experts. They both told me the same thing. My foundation was perfect but when they were originally putting up the plaster they must have done a bad job. Over the years as it settled and dried, it just would crack open. So basically check foundation and then if its all good just plaster it over.
@@Chuco029 The plaster in my house in spots has settled and pulled completely away from the original nails fastening it to the joist. I'm fastening like this video shows and hoping the crack doesn't come back. Mine's gyprock lathe and drywall screws will catch the backing.