Tal-Y-Bont

As we stripped back the roof, problems grew clearer

This roof in Tal-Y-Bont in Ceredigion (between Aberystwyth and Machynlleth) shows what can happen when previous roofers have not fitted a roof to proper standards in accordance with Building Regulations - in this case, serious condensation problems.

All roofs in the UK need to be insulated but the level of insulation depends on whether it's a "warm roof" or a "cold roof", which in turn depends upon factors such as the position of the…