Quality conditions WE
The wood blocks must be produced from healthy, clean-edged trimmed timber. Blocks from 100 mm only have to be planed on the long sides. Colour variations, healthy sapwood and blue stain in pine are basically permissible. Blocks from 40 mm height of single-stem wood up to 10% of the total quantity are permissible.
Moisture content
The average moisture content of the blocks (on delivery) must be established in accordance with the anticipated room climate of the local conditions. For woodblock RE, this is 8 - 12%, and for woodblock WE 8 - 13%. The average moisture content of individual blocks may vary from the established figure by ± 2% moisture content. If no unusual room climate conditions are to be expected, the following wood moisture values have proven to be suitable in practice for the relevant application areas:
Woodblock
RE = 9 % - 10% (± 2%)
WE = 11 % - 12% (± 2%)
In the event of room climate conditions varying
from the above requirements, this must
be noted specially in the list of specifications,
or notified in advance by the client to the
contractor of the woodblock work, and the
required wood moisture content specified.
If the woodblock is to be laid on a non-heatinsulated
undersurface, this must also be
brought to the attention of the contractor.
The moisture content is determined on delivery
and on laying. The determination of the
moisture content is carried out with the aid
of suitable electronic moisture measurement
devices. In the event of doubt, the DARR
method specified in DIN 52183 should be
used to establish the definitive value.
