I will write about the install of my MVHR system, as this is something I have done myself (with help).  Theo house is being built by my contractor, supervised by my Architect and QS (who is the CDM).  As I am remote from the location I can only watch what happens on CCTV.  When I was last there the old house was standing and we had disconnected the services. 6 Months later, I have a new house, Weather tight shell, Windows and doors in, sarking and felt on, and tiles and PV being fitted.  I am do