I had a single story extension built on my house about 4 years ago. Two long thin vertical crack have since appeared where the new walls meet the old. If this gets worse and I need to get it fixed would the cost be covered by household insurance?
sandy,
Natural shrinkage when stuff dries out, it contracts. i have actually seen real problems, a gap in internal wall that you could stick your fingers into, that was subsidence, but cracks on fairly new work are quite common. don't panic