Fachverband Holzpflaster e.V. | Rethelstraße 28 Hof | 40237 Duesseldorf | Germany

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).

©2011 Fachverband Holzpflaster e.V.