We have ordered our timber frame kit from Scotframe. After weighing up various options we decided to go with the company that the original owner of the plot had been dealing with. Being from the south east we're more used to seeing brick and block houses as timber frame is not as popular down there but it is very popular in Scotland.
We wanted to build a well insulated house so we have gone for Scotframe's closed panel timber frame system called SupaWall that should meet future thermal performance targets. Once combined with mechanical heat recovery and solar panels we hope that this combination will keep heating costs manageable.