Drywall repair guide
A crack can involve a seam, loose tape or movement in the assembly. Applying another thin cosmetic coat may hide the line without addressing its cause.
What to discuss before work starts
Tell the contractor when the crack returns and whether doors stick or nearby surfaces move. Unexplained movement may require separate evaluation.
Put the scope in writing
Confirm the affected surface, repair method, finish boundaries, room access and any separate work before scheduling. The condition of concealed material can change what is needed.