Holz100 is a large panelized pure solid wood construction that is cross laminated without glue; it is friction fit with the use of beech wood dowels. Although made of wood, Holz100 has a completely different structure to conventional wood frame construction. The mass size of Holz100 in comparison, takes advantage of the inherent fire resistance of heavy timber. In the event of a fire, the surface layers char and act as sacrificial or insulating layers against the onset of heat to the inner layers of wood. There are no glues, chemical adhesives, or toxic chemicals. This means there is no fuel to ignite the fire or risk of premature delamination as a result of reduced strength in adhesive at rising temperatures during a fire. The moonwood used to manufacture Holz100 chars at a predictable rate of 0.5-0.7mm/min according to EN 13501-1.
The European standard in high-tech woodblock and frame buildings (with normal, average wall, ceiling and roof thicknesses) is maximal F30. This means that the building element resists a flame at 1,000 degrees Celsius for 30 minutes. Holz100 elements reached top ratings of up to F180! This means six times safer than the usual reinforced concrete or stud structured brick walls offer. The ceiling ratings are even better.