When Drilling through steel lintels the plaster can easily be cracked when you break through and the drill hits the top of the recess
Use a foam sanding sponge over the drill bit as a shock absorber to prevent this from happening
When Drilling through steel lintels the plaster can easily be cracked when you break through and the drill hits the top of the recess
Use a foam sanding sponge over the drill bit as a shock absorber to prevent this from happening