Once we start your installation we will carry out a full inspection of the timbers that we intend to fix to, if rot is discovered then we simply cut away the offending timber and replace the damaged section with new treated timber to allow for a secure fixing.
Within reason this is done at no extra cost to the client, however we will always advise if a serious rotting problem is discovered and will stop works until a full survey has been carried out by a compitent building surveyor, this is a very extreme circumstance and would need to be funded by the client.