As a temporary fix to stop rain entering the Diffutherm woodfibre insulation to the gaps at the jambs and head, silicone has been carefully inserted between the aluminum cladding to the fenestration and the back face of the plastic APU bead, making use of the weather seal. Obviously not a permanent fix, but should buy time to get to the bottom of the issues. Very disappointingly,the installer Downs Energy and the system manufacturer, NBT have now both walked away form the job and it my require the courts to get a resolution.
