Heat Insulation and Fire Properties
Heat permeation resistances of various floors and floor coverings |
||
|---|---|---|
Thickness |
Covering |
m² x K/W |
2 mm |
PVC Flooring |
0,02 |
13 mm |
Ceramic Tiles |
0,02 |
20 mm |
Natural Stone |
0,02 |
35 mm |
Cement Screed |
0,02 |
20 mm |
Poured Asphalt |
0,03 |
8 mm |
Carpet |
0,09 |
30 mm |
Oak Woodblock |
0,10 |
60 mm |
Pine Woodblock |
0,30 |
Warmth to the feet
Woodblock is warm to the feet, and particularly fulfils the requirements on standing areas specified by prevailing workplace regulations. According to measurements carried out at the University of Stuttgart, 10 min. permanent contact with the foot at a temperature of 38 °C causes cooling of over 10 °C in the case of cement screed, but only 2 °C – 2.8 °C in the case of woodblock. With woodblock, the foot temperature also remains constant after the initial fall. The flow losses are covered by resupply of warmth.
Heat insulation
The heat permeation resistance of the
floor is calculated from the total of the
resistances of the individual layers. In the
case of woodblock, this depends on the
thickness = a and the heat conductivity of
the wood type λ (unit of measure w/m K),
and is calculated according to the formula:
= 1 / Λ = d / λ.
The good heat-insulating properties of
woodblock become particularly clear when
compared to other types of flooring.
Fire characteristics
Due to the method of laying, woodblock
is tightly sealed on five surface sides. On
the sixth surface, the tread surface, only
minor carbonisation occurs when exposed
to fire, which forms an effective air barrier.
Fire damage therefore causes only minor
carbonisation of the surface to a shallow
depth.
Woodblock of oak including the sealant fulfils
the requirements of Building Materials
Class B 1 to DIN 4102 “Low flammability”
(examination result of the FMPA-Ba/Wü.-
Otto Graf Institute, Stuttgart).
