Strong frame construction, vertical rafters ca. every 40 cm. 
Option : isolation between the rafters. 
Option: Anti-damp cloth.
- 28 mm + 58
natural / autoclave - 28 mm + 58
cedar - 28 mm + 58
oak - 28 mm + 58
iroko - 28 mm + 58
thermo ayous - big hor.
Colors Autoclave:
Woodtypes:
- Price range:
- Explanation woodtypes: