When installed between wall studs, even perfect wall insulation only eliminates conduction through the insulation but leaves unaffected the conductive heat loss through such materials as glass windows and studs.
However, any timber-framed home should have been built from new with a high standard of insulation already in place, fitted between the timber wall studs.
Their hair flows like rippling flags of cornsilk, their faces have such symmetry that you could use their cheekbones as a spirit level on your wall studs.
The main part of the roof is supported on crown post trusses with the aisle roofs formed by raking rafters between the wall studs and the main truss posts.
