Can anyone advise how much a slate re roof should cost please? It is a 1930's semi located in the North West, with 3 bedrooms and 1 bathroom. The down stairs floor measurements are 7.9 m x 5.6m if this helps. We would probably need new roof batons and felt as there is no felt at present. Worried, as most people are, about being ripped off. The roof has not been attended to for at least 30 years, so am I right in thinking this is the only option? Building society survey suggests it is.