Repairing 7/8 plaster/drywall

[jawmaw]

We attached our new garage with a breezeway and to fit the breezeway we had to remove a window on the house.

House was built in 1957 and I have never seen this type of drywall before. It appears to be 3/8 drywall with 1/2 plaster for a total of 7/8. Has anyone ever repaired this before?

Photo attached.

 

[Kamn]

treat it the same as a plaster wall.......we had this in the home as well before I gutted the place last spring and renovated the whole house

 

[Daedalus]

Button board most likely. In place of lath, gives the plaster something to hold onto. Drywall, tape and mud.

 

[KenC]

A couple of layers of 3/8 drywall with setting type compound between, tape and same compound over. Be sure to keep it a little low, then finish with more compound.

 

[jawmaw]

Awesome! Thanks everyone.

 

[Diggla]

Its called rock lath. Sheeteock with holes in it for strucco lite to adhear too. U can use reg sheeteock to fill then plaster to take out serious dips. Then compound

 

[Kevin54]

3/8" and 1/2" will give you 7/8". Screw, tape mud, and feather out.

 

[Cyberbear]

Depending on your budget and amount of time and labor you wish to be involved with, perhaps you can cut strips of cheap 1/4" hardboard used as furring over the wall studs and cover that with 5/8" sheet rock to achieve the total thickness desired.