Finished another stretch of overcladding at the shack last weeked - an average of 82mm of decent insulation and hugely improved airtightness thank to a continous wind and vapour barrier laid over the original shiplap boarding.
Having set up a little local symmetry with the paired living room windows, the new bedroom window takes a different slant: rather than look straight into the neighbours, the new cladding peels away to make an oblique window that scoops in the evening sun and gives a framed view of the fields and church tower beyond.
An inward opening shutter gives night-time ventilation through gaps in the rough-sawn Douglas Fir boards. And a mirror on the deep reveal reveals more, bouncing light and view around.
The window is a box of 18mm ply, wrapped all round with 25mm insulation, boarded on one side, glazed with direct fixed glass for the window and roofed with self-adhesive membrane running to an aluminium angle drip.
Locally sawn Douglas Fir at £15/cubic foot makes an economical and durable solution.