Lyonnet C
Bibliographic info:
Cahiers du Centre Scientifique et Technique du Batiment, No 1926, livr 249, May 1984. 15p, 12 figs.

Roof space ventilation is necessary to evacuate water vapour to avoid condensation and to conserve the wooden roof supports. It has been affected by 1. increased insulation, 2. snow screens fitted under the roof, 3. increased humidity due to